
ACE Securities Corp. Home Equity Loan Trust Series 2007-SL1	FREE WRITING PROSPECTUS

The following is a free writing prospectus. The information in this free writing prospectus is preliminary and is subject to completion or change.

FREE WRITING PROSPECTUS

ACE Securities Corp.

$351,623,000(Approximate)

Home Equity Loan Trust

Series 2007-SL1

ACE Securities Corp.

(Depositor)

ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

(Issuing Entity)

February 20, 2007

The depositor has filed a registration statement (including a prospectus) with the SEC for the offering to which this free writing prospectus relates. Before you invest, you should read the prospectus in that registration statement and other documents the depositor has filed with the SEC for more complete information about the depositor, the issuing entity and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling DBSI’s trading desk at 212-250-7730. This free writing prospectus is not required to contain all information that is required to be included in the base prospectus and the prospectus supplement. The information in this free writing prospectus is preliminary and is subject to completion or change. The information in this free writing prospectus, if conveyed prior to the time of your commitment to purchase, supersedes information contained in any prior similar free writing prospectus relating to these securities. THIS FREE WRITING PROSPECTUS IS NOT AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE SUCH OFFER, SOLICITATION OR SALE IS NOT PERMITTED. The information in this free writing prospectus may be based on preliminary assumptions about the pool assets and the structure. Any such assumptions are subject to change.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

The analysis in this report is based on information provided by ACE Securities Corp. (the “Depositor”). Investors are urged to read the base prospectus and the prospectus supplement and other relevant documents filed or to be filed with the Securities and Exchange Commission because they contain important information. Such documents may be obtained without charge at the Securities and Exchange Commission’s website. Once available, the base prospectus and prospectus supplement may be obtained without charge by contacting Deutsche Bank Securities, Inc.’s (“DBSI”) trading desk at (212) 250-7730. This free writing prospectus is not required to contain all information that is required to be included in the base prospectus and the prospectus supplement (collectively, the “Prospectus”). The information in this free writing prospectus is preliminary and is subject to completion or change. The information in this free writing prospectus, if conveyed prior to the time of your commitment to purchase, supersedes information contained in any prior similar free writing prospectus relating to these securities. This free writing prospectus is not an offer to sell or a solicitation of an offer to buy these securities in any state where such offer, solicitation or sale is not permitted. You should consult your own counsel, accountant, and other advisors as to the legal, tax, business, financial and related aspects of a purchase of these securities.

The attached information contains certain tables and other statistical analyses (the “Computational Materials”) which have been prepared by DBSI in reliance upon information furnished by the Depositor. Numerous assumptions were used in preparing the Computational Materials that may or may not be reflected herein. As such, no assurance can be given as to whether the Computational Materials and/or the assumptions upon which they are based reflect present market conditions or future market performance. These Computational Materials should not be construed as either projections or predictions or as legal, tax, financial or accounting advice. Any weighted average lives, yields and principal payment periods shown in the Computational Materials are based on prepayment assumptions, and changes in such prepayment assumptions may dramatically affect such weighted average lives, yields and principal payment periods. In addition, it is possible that prepayments on the underlying assets will occur at rates slower or faster than the rates shown in the attached Computational Materials. Furthermore, unless otherwise provided, the Computational Materials assume no losses on the underlying assets and no interest shortfalls. The specific characteristics of the securities may differ from those shown in the Computational Materials by a permitted variance of +/- 10% prior to issuance. Neither DBSI nor any of its affiliates makes any representation or warranty as to the actual rate or timing of payments on any of the underlying assets or the payments or yield on the securities.

An investor or potential investor in the certificates (and each employee, representative, or other agent of such person or entity) may disclose to any and all persons, without limitation, the tax treatment and tax structure of the transaction (as defined in United States Treasury Regulation Section 1.6011-4) and all related materials of any kind, including opinions or other tax analyses, that are provided to such person or entity. However, such person or entity may not disclose any other information relating to this transaction unless such information is related to such tax treatment and tax structure.

THIS INFORMATION IS FURNISHED TO YOU SOLELY BY DBSI AND NOT BY THE ISSUING ENTITY OF THE SECURITIES OR ANY OF ITS AFFILIATES. DBSI IS ACTING AS UNDERWRITER AND NOT ACTING AS AGENT FOR THE ISSUING ENTITY IN CONNECTION WITH THE PROPOSED TRANSACTION.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

FREE WRITING PROSPECTUS DATED February 20, 2007

ACE Securities Corp.

Home Equity Loan Trust, Series 2007-SL1

$351,623,000(Approximate)

Subject to a permitted variance of +/- 10%.

Structure Overview
*To 10% Optional Termination*
Class	Approximate Size ($)	Type	WAL (yrs)	Principal Payment Window (months)	Pmt Delay (days)	Interest Accrual Basis	Legal Final Maturity	Expected Ratings S / M

Offered Certificates:
A-1	48,608,000	Float	1.19	1 - 36	0	ACT/360	March 2037	AAA / Aaa
A-2	223,538,000	Float	1.19	1 - 36	0	ACT/360	March 2037	AAA / Aaa
M-1	19,022,000	Float	5.00	36 - 64	0	ACT/360	March 2037	AA+ / Aa1
M-2	18,645,000	Float	5.05	54 - 64	0	ACT/360	March 2037	AA / Aa2
M-3	8,475,000	Float	4.55	50 - 64	0	ACT/360	March 2037	AA- / Aa3
M-4	9,040,000	Float	4.34	46 - 64	0	ACT/360	March 2037	A+ / A1
M-5	6,215,000	Float	4.21	44 - 64	0	ACT/360	March 2037	A / A2
M-6	5,085,000	Float	4.13	43 - 64	0	ACT/360	March 2037	A- / A3
M-7	4,897,000	Float	4.07	42 - 64	0	ACT/360	March 2037	BBB+ / Baa1
M-8	3,955,000	Float	4.02	41 - 64	0	ACT/360	March 2037	BBB / Baa2
M-9	4,143,000	Float	3.99	40 - 64	0	ACT/360	March 2037	BBB- / Baa3
Total Offered	351,623,000

Non-Offered Certificates:
M-10	4,520,000	Float	3.95	40 - 64	0	ACT/360	March 2037	BB+ / Ba1
Total	356,143,000

Transaction Overview

Certificates:

The Class A-1 Certificates and Class A-2 Certificates (the “Senior Certificates” or “Class A Certificates”) and the Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9 and Class M-10 Certificates (collectively, the “Mezzanine Certificates”). The Class A-1 Certificates are backed by conforming principal balance fixed-rate second lien mortgage loans (the “Group I Mortgage Loans”) and the Class A-2 Certificates are backed by fixed-rate second lien mortgage loans with conforming and non-conforming principal balances (the “Group II Mortgage Loans”). The Mezzanine Certificates are backed by the Group I Mortgage Loans and Group II Mortgage Loans (collectively, the “Mortgage Loans”). The Class A Certificates and the Mezzanine Certificates (other than the Class M-10 Certificates) are referred to collectively in this free writing prospectus as the “Offered Certificates”. The pass-through rates on the Senior Certificates and Mezzanine Certificates will be the lesser of (i) One-Month LIBOR plus their respective margins and (ii) the applicable Net WAC Pass-Through Rate. The trust will also issue the Class CE-1 Certificates, the Class CE-2 Certificates, the Class P Certificates, and the Class R Certificates which, along with the Class M-10 Certificates, are referred to herein as the “Non-offered Certificates”.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview

Collateral:		As of the Cut-off Date, the Mortgage Loans will consist of approximately 6,457 fixed-rate second lien, closed-end, mortgage loans. The aggregate outstanding principal balance of all of the Mortgage Loans is approximately $376,674,430 as of the Cut-off Date. The Mortgage Loans will be separated into two groups. The Group I Mortgage Loans will represent approximately 1,487 conforming principal balance fixed-rate Mortgage Loans totaling approximately $67,277,963 and the Group II Mortgage Loans will represent approximately 4,970 conforming and non-conforming principal balance fixed Mortgage Loans totaling approximately $309,396,467.

Senior Certificates or Class A Certificates:		Class A-1 Certificates and Class A-2 Certificates

Mezzanine Certificates:		Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9 and Class M-10 Certificates

Depositor:		ACE Securities Corp. (“ACE”)

Originators:	Originator	Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance
	American Home Mortgage		80,644,110		21.41
	GMAC		78,521,877		20.85
	Chapel		62,080,036		16.48
	Mortgage IT		25,209,412		6.69
	Other		130,218,995		34.57
	Total		376,674,430		100.00

Master Servicer and Securities Administrator:		Wells Fargo Bank, National Association

Servicers:		GMAC Mortgage Corporation (“GMAC”) and Ocwen Loan Servicing, LLC (“Ocwen”)

Trustee:		HSBC Bank USA, National Association

Custodians:		Wells Fargo Bank, National Association and Deutsche Bank National Trust Company

Credit Risk Manager:		Clayton Fixed Income Services Inc. (formerly known as The Murrayhill Company)

Underwriter:		Deutsche Bank Securities Inc.

Swap Provider:		TBD

Cut-off Date:		February 1, 2007

Expected Pricing:		Week of February 19, 2007

Expected Closing Date:		On or about February 28, 2007

Record Date:		For so long as the Offered Certificates are held in book-entry form, the Record Date will be the business day immediately preceding the related Distribution Date, With respect to any Offered Certificates held in definitive form, the Record Date will be the last business day of the month immediately preceding the month in which the related Distribution Date occurs.

Distribution Date:		25^th day of each month (or the next business day if such day is not a business day) commencing in March 2007.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Determination Date:		With respect to any Distribution Date, the 15^th day of the calendar month in which such Distribution Date occurs or, if such 15^th day is not a business day, the business day immediately preceding such 15^th day.

Due Period:		The Due Period with respect to any Distribution Date commences on the second day of the month immediately preceding the month in which such Distribution Date occurs and ends on the first day of the month in which such Distribution Date occurs.

Prepayment Period:		With respect to the first Distribution Date and the Mortgage Loans serviced by (i) GMAC, the period beginning on the Cut-off Date and ending on the (15^th) day of the month of such Distribution Date, and with respect to any Distribution Date thereafter, the period beginning on the sixteenth (16^th) day of the month preceding the related Distribution Date and ending on the fifteenth (15^th) day of the month in which such Distribution Date occurs and (ii) Ocwen, with respect to prepayments in full, the period beginning on the sixteenth day of the month preceding the related Distribution Date and ending on the fifteenth day of the month of such Distribution Date, and (ii) with respect to prepayments in part, the prior calendar month.

Interest Accrual Period:		Interest will initially accrue on the Offered Certificates from the Closing Date to (but excluding) the first Distribution Date, and thereafter, from the prior Distribution Date to (but excluding) the current Distribution Date on an actual/360 basis. The Offered Certificates will initially settle flat (no accrued interest).

Interest Distribution Amount:		For the Offered Certificates of any class on any Distribution Date is equal to interest accrued during the related Interest Accrual Period on the Certificate Principal Balance of that class immediately prior to such Distribution Date at the then applicable pass-through rate for such class, and reduced (to an amount not less than zero), in the case of each such class, by the allocable share, if any, for such class of prepayment interest shortfalls to the extent not covered by Compensating Interest paid by the Master Servicer or the Servicers and shortfalls resulting from the application of the Servicemembers’ Civil Relief Act or similar state or local laws.

Senior Interest Distribution Amount:		For any class of Class A Certificates on any Distribution Date is an amount equal to the sum of the Interest Distribution Amount for such Distribution Date for each such class and the Interest Carry Forward Amount, if any, for such Distribution Date for each such class.

Administration Fee Rate:		The Master Servicer, the Servicers and the Credit Risk Manager will be paid monthly fees on the outstanding principal balance of the Mortgage Loans. These fees (“Administration Fee Rate”) initially aggregate to a weighted average cost of approximately 0.5285% per annum for the Mortgage Loans.

Compensating Interest:		Each Servicer will be required to cover Prepayment Interest Shortfalls on prepayments in full on the Mortgage Loans received during the portion of the related Prepayment Period occurring between the 16^th day of the month prior to the month of the Distribution Date to the last day of such prior month up to the Servicing Fee payable to the related Servicer. If a Servicer fails to make such payments, the Master Servicer will be required to do so in an amount not to exceed the compensation payable to the Master Servicer.

Prepayment Interest Shortfalls:		Interest shortfalls attributable to voluntary principal prepayments on the Mortgage Loans.

Expense Adjusted Mortgage Rate:		For any Mortgage Loan for any Distribution Date shall be a per annum rate equal to the applicable Mortgage Rate for such Mortgage Loan as of the first day of the month preceding the month in which such Distribution Date occurs minus the Administration Fee Rate.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Optional Termination:	On any Distribution Date on which the aggregate outstanding principal balance of the Mortgage Loans as of the related Determination Date is less than or equal to 10% of the aggregate outstanding principal balance of the Mortgage Loans as of the Cut-off Date, the Master Servicer may purchase all of the Mortgage Loans and REO properties remaining in the trust, causing an early retirement of the Certificates, but is not required to do so. In the event that the Master Servicer fails to exercise such purchase option on the first possible optional termination date, each Servicer may, subject to certain conditions set forth in the pooling and servicing agreement, exercise such purchase option. In the event either the Master Servicer or a Servicer exercises this option, the portion of the purchase price allocable to the certificates will be, to the extent of available funds, (i) 100% of the then outstanding Certificate Principal Balance of the certificates, plus (ii) one month’s interest on the then outstanding Certificate Principal Balance of the certificates at the then applicable pass-through rate for each such class, plus (iii) any previously accrued but unpaid interest thereon to which the holders of the certificates are entitled, together with the amount of any Net WAC Rate Carryover Amounts.

Monthly Servicer Advances:	The Servicers will collect monthly payments of principal and interest on the related Mortgage Loans and will be obligated to make advances of delinquent monthly principal and interest payments but only to the extent such amounts are deemed recoverable. If a Servicer fails to make any such advances, the Master Servicer will be required to do so subject to its determination of recoverability. The Servicers and the Master Servicer are entitled to be reimbursed for these advances, and therefore these advances are not a form of credit enhancement.

Credit Enhancement:	1)	Excess Interest;
	2)	Overcollateralization (“OC”); and
	3)	Subordination.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Allocation of Losses:		Any Realized Losses on the Mortgage Loans will be allocated on any Distribution Date, first, to Net Monthly Excess Cashflow and Net Swap Payments made to the Swap Provider, if any, second, to the Class CE-1 Certificates (the Class CE-2 Certificate will not have a certificate principal balance and will not be allocated any losses), third, to the Class M-10 Certificates, fourth, to the Class M-9 Certificates, fifth, to the Class M-8 Certificates, sixth, to the Class M-7 Certificates, seventh, to the Class M-6 Certificates, eighth, to the Class M-5 Certificates, ninth, to the Class M-4 Certificates, tenth, to the Class M-3 Certificates, eleventh, to the Class M-2 Certificates, and twelfth, to the Class M-1 Certificates. There will be no allocation of Realized Losses to the Class A Certificates. Investors in the Class A Certificates should note, however, that although Realized Losses cannot be allocated to such Certificates, under certain loss scenarios there may not be enough principal and interest on the Mortgage Loans to distribute to the holders of the Class A Certificates all principal and interest amounts to which they are then entitled. Once Realized Losses have been allocated to the Mezzanine Certificates, such amounts with respect to such Certificates will no longer accrue interest and such amounts will not be reinstated thereafter (except in the case of subsequent recoveries). However, the amount of any Realized Losses allocated to the Mezzanine Certificates may be distributed to such certificates on a subordinated basis on any Distribution Date from Net Monthly Excess Cashflow, to the extent available for such distribution or from any Net Swap Payments payable by the Swap Provider available for this purpose. A “Realized Loss” for a Liquidated Mortgage Loan is equal to the principal balance of such Liquidated Mortgage Loan plus interest thereon from the date on which interest was last paid less any liquidation proceeds received on such Mortgage Loan and for a Charged Off Mortgage Loan is equal to the principal balance of such Charged Off Mortgage Loan plus interest thereon from the date on which interest was last paid. A “Liquidated Mortgage Loan” is a Mortgage Loan that was liquidated and for which the related Servicer has determined that it has received all amounts it expects to receive in connection with such liquidation, including payments under any related private mortgage insurance policy, hazard insurance policy or any condemnation proceeds and amounts received in connection with the final disposition of the related REO property. A “Charged Off Mortgage Loan” is a defaulted Mortgage Loan that the related Servicer is required to charge off once such Mortgage Loan becomes 180 days delinquent provided that such Mortgage Loan has not yet been liquidated and provided further, that the related Servicer has determined, based on a broker’s price opinion and other relevant considerations, that no significant net recovery is possible through foreclosure proceedings or other liquidation of the related mortgaged property or that the potential net recovery is anticipated to be an amount that is insufficient to warrant proceeding through foreclosure or other liquidation of the related mortgaged property.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Required Overcollateralization Amount:		Overcollateralization refers to the amount by which the aggregate principal balance of the Mortgage Loans exceeds the aggregate Certificate Principal Balance of the certificates (other than the Class CE-1 Certificates). This excess (the “Overcollateralization Amount”) is intended to protect the certificateholders against shortfalls in payments on the Certificates. The Required Overcollateralization Amount for the Certificates, which will be fully established at issuance, is anticipated to be approximately 5.45% of the aggregate principal balance of the Mortgage Loans as of the Cut-off Date. On or after the Stepdown Date and provided that a trigger event is not in effect, the Required Overcollateralization Amount may be permitted to decrease to approximately 10.90% of the aggregate principal balance of the Mortgage Loans as of the last day of the related Due Period, subject to a floor amount of approximately 0.50% of the aggregate outstanding principal balance of the Mortgage Loans as of the Cut-off Date. If, due to losses, the Overcollateralization Amount is reduced below the Required Overcollateralization Amount, excess spread, to the extent available will be paid to the Certificates then entitled to receive distributions in respect of principal in order to reduce the certificate principal balance of such Certificates to the extent necessary to reach the Required Overcollateralization Amount. In addition, Net Swap Payments paid by the Swap Provider may be used to restore or maintain the Required Overcollateralization Amount.

Overcollateralization Increase Amount:		An Overcollateralization Increase Amount for any Distribution Date is the lesser of (i) the Net Monthly Excess Cashflow and Net Swap Payments received from the Swap Provider, if any, for that Distribution Date and (ii) the excess of the Required Overcollateralization Amount over the current Overcollateralization Amount.

Overcollateralization Reduction Amount:		An Overcollateralization Reduction Amount for any Distribution Date is the amount by which the current Overcollateralization Amount exceeds the Required Overcollateralization Amount after taking into account all other distributions to be made on the Distribution Date limited to the distribution of principal on the Mortgage Loans.

Stepdown Date:		Is the earlier of (i) the first Distribution Date following the Distribution Date which the Certificate Principal Balances of the Class A Certificates are reduced to zero and (ii) the later to occur of (x) the Distribution Date occurring in March 2010 and (y) the first Distribution Date on which the Class A Credit Enhancement Percentage (calculated for this purpose only after taking into account distributions of principal on the Mortgage Loans, but prior to any distribution of principal to the holders of the certificates) is equal to or greater than approximately 55.50%.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Credit Enhancement
Percentage:

The Credit Enhancement Percentage for any class of certificates and any Distribution Date is the percentage obtained by dividing (x) the aggregate Certificate Principal Balance of the class or classes subordinate thereto (which includes the Overcollateralization Amount) by (y) the aggregate principal balance of the Mortgage Loans, calculated after giving effect to scheduled payments of principal due during the related Due Period, to the extent received or advanced, and unscheduled collections of principal received during the related Prepayment Period and distribution of the Principal Distribution Amount to the holders of the Certificates then entitled to distributions of principal on the Distribution Date.

Class	(S/M)	Initial CE %	CE % On/After Step Down Date
A	AAA / Aaa	27.75%	55.50%
M-1	AA+ / Aa1	22.70%	45.40%
M-2	AA / Aa2	17.75%	35.50%
M-3	AA- / Aa3	15.50%	31.00%
M-4	A+ / A1	13.10%	26.20%
M-5	A / A2	11.45%	22.90%
M-6	A- / A3	10.10%	20.20%
M-7	BBB+ / Baa1	8.80%	17.60%
M-8	BBB / Baa2	7.75%	15.50%
M-9	BBB- / Baa3	6.65%	13.30%
M-10	BB+ / Ba1	5.45%	10.90%

Net Monthly Excess Cashflow:		For any Distribution Date is equal to the sum of (i) any Overcollateralization Reduction Amount and (ii) the excess of the Available Distribution Amount over the sum of (w) with respect to the Class A Certificates, the Senior Interest Distribution Amount for such Distribution Date, (x) with respect to the Mezzanine Certificates, the Interest Distribution Amount for such Distribution Date, (y) the amount of principal required to be distributed to the holders of the certificates on such Distribution Date and (z) any Net Swap Payment or the Swap Termination Payment (not caused by a Swap Provider Trigger Event (as defined in the Swap Agreement)), owed to the Swap Provider.

Net WAC Pass- Through Rate:		Class A-1 and Class A-2 Certificates: The per annum rate (subject to adjustment based on the actual number of days elapsed in the related Interest Accrual Period) equal to the product of (i) 12 and (ii) a fraction, expressed as a percentage, the numerator of which is the difference of (a) the amount of interest which accrued on the Mortgage Loans in the related loan group in the prior calendar month minus the fees payable to the Servicers, the Master Servicer and the Credit Risk Manager with respect to the related Mortgage Loans for such Distribution Date, over (b) the Group I Allocation Percentage or Group II Allocation Percentage, as applicable, of any Net Swap Payment or Swap Termination Payment made to the Swap Provider for such Distribution Date (which was not caused by a Swap Provider Trigger Event as defined in the Swap Agreement), and the denominator of which is the aggregate principal balance of the Mortgage Loans in the related loan group as of the last day of the immediately preceding Due Period (or as of the Cut-off Date with respect to the first Distribution Date), after giving effect to principal prepayments received during the related Prepayment Period.

		Mezzanine Certificates: The per annum rate equal to the weighted average (weighted in proportion to the results of subtracting from the aggregate principal balance of each loan group, the certificate principal balances of the related Class A Certificates), of (i) the Net WAC Pass-Through Rate for the Class A-1 Certificates and (ii) the Net WAC Pass-Through Rate for the Class A-2 Certificates.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1



		Group I Allocation Percentage: The aggregate principal balance of the Group I Mortgage Loans divided by the sum of the aggregate principal balance of the Group I Mortgage Loans and the Group II Mortgage Loans.

		Group II Allocation Percentage: The aggregate principal balance of the Group II Mortgage Loans divided by the sum of the aggregate principal balance of the Group I Mortgage Loans and the Group II Mortgage Loans.

Net WAC Rate Carryover Amount:		If on any Distribution Date the Pass-Through Rate for any class of the Series 2007-SL1 Certificates is limited by the Net WAC Pass-Through Rate, such class will be entitled to the “Net WAC Rate Carryover Amount” which will be equal to the sum of (i) the excess, if any of (a) the amount of interest that would have accrued on such class based on One-Month LIBOR plus the related margin over (b) the amount of interest accrued on such class based on the Net WAC Pass-Through Rate and (ii) the unpaid portion of any related Net WAC Rate Carryover Amount from the prior Distribution Date together with interest accrued on such unpaid portion at a rate equal to One-Month LIBOR plus the related margin for the most recently ended Interest Accrual Period. Any Net WAC Rate Carryover Amount will be paid on such Distribution Date or future Distribution Dates to the extent of funds available. The Net WAC Rate Carryover Amount will be distributed from certain amounts received by the Securities Administrator, on behalf of the supplemental interest trust (described below), under the Swap Agreement, if any, and from the Net Monthly Excess Cashflow on a subordinated basis on the same Distribution Date or on any subsequent Distribution Date to the extent of available funds. The ratings on each class of Offered Certificates do not address the likelihood of the payment of any Net WAC Rate Carryover Amount from Net Monthly Excess Cashflow.

Swap Agreement:		On the Closing Date, the Trustee will enter into a Swap Agreement with the Swap Provider described in the prospectus supplement. The Swap Agreement will have an initial notional amount of $281,893,162. Beginning with the Distribution Date in September 2007, the trust (through a supplemental interest trust) will be obligated to pay an amount equal to the product of (i) [5.28]% per annum, (ii) the Swap Notional Amount (as defined below) and (iii) a fraction, the numerator of which is 30 and the denominator of which is 360, and the Swap Provider will be obligated to pay to the supplemental interest trust, for the benefit of the holders of the Offered Certificates, an amount equal to the product of (i) one-month LIBOR, (ii) the Swap Notional Amount and (iii) a fraction, the numerator of which is the actual number of days elapsed during the related Interest Accrual Period and the denominator of which is 360, until the Swap Agreement is terminated. The “Swap Notional Amount” for each Distribution Date will be equal to the lesser of (a) the aggregate certificate principal balance of the Offered Certificates and Class M-10 Certificates on the day immediately preceding such Distribution Date, and (b) the scheduled swap notional amount set forth in the Swap Agreement for such Distribution Date. Only the net amount of the two obligations will be paid by the appropriate party (the “Net Swap Payment”). See the attached schedule.

		A separate trust created under the pooling and servicing agreement (the “Supplemental Interest Trust”) will hold the Swap Agreement. The Swap Agreement and any payments made by the Swap Provider thereunder will be assets of the Supplemental Interest Trust but will not be assets of any REMIC.

		Upon early termination of the Swap Agreement, the Securities Administrator on behalf of the Supplemental Interest Trust or the Swap Provider may be liable to make a termination payment (the ‘‘Swap Termination Payment’’) to the other party (regardless of which party caused the termination). The Swap Termination Payment will be computed in accordance with the procedures set forth in the Swap Agreement. In the event that the Securities Administrator, on behalf of the Supplemental Interest Trust, is required to make a Swap Termination Payment which is not payable as a result of the occurrence of a swap provider trigger event under the Swap Agreement, that payment will be paid on the related Distribution Date, and on any subsequent Distribution Dates until paid in full prior to distributions to Certificateholders.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Available Distribution Amount:		For any Distribution Date, net of the administration fees, an amount equal to (i) the aggregate amount of scheduled monthly payments on the Mortgage Loans due on the related Due Date and received on or prior to the related Determination Date; (ii) unscheduled payments in respect of the Mortgage Loans (including prepayments, insurance proceeds, liquidation proceeds, subsequent recoveries and proceeds from repurchases of and substitutions for the Mortgage Loans occurring during the Prepayment Period or proceeds from the repurchase of the Mortgage Loans due to the Optional Termination of the Trust); (iii) all P&I Advances with respect to the Mortgage Loans received for the Distribution Date; (iv) all Compensating Interest paid by each Servicer or the Master Servicer in respect of Prepayment Interest Shortfalls for the related Due Period; and (v) Net Swap Payments payable by the Swap Provider.

Class A Principal Distribution Amount:		Until the Stepdown Date, the Class A Principal Distribution Amount will be distributed to the holders of the Class A-1 Certificates and the Class A-2 Certificates concurrently, on a pro rata basis based on the related Class A Principal Allocation Percentage (for any Distribution Date, the percentage equivalent of a fraction, the numerator of which is the principal remittance amount for the Group I Mortgage Loans (in the case of the Class A-1 Certificates) or the principal remittance amount for the Group II Mortgage Loans (in the case of the Class A-2 Certificates) and the denominator of which is equal to the principal remittance amount for all of the Mortgage Loans).

		Until the Stepdown Date, or if a Trigger Event occurs, the Class A Certificates will receive the principal collected on the Mortgage Loans plus any excess interest and any Net Swap Payment received by the Securities Administrator from the Swap Provider required to restore or maintain the Required Overcollateralization Amount until the aggregate certificate principal balance of the Class A Certificates has been reduced to zero. On or after the Stepdown Date, if no Trigger Event occurs, principal paid on the Class A Certificates will be an amount such that the Class A Certificates will maintain approximately a 55.50% Credit Enhancement Percentage (2x the Class A Credit Enhancement Percentage). The Class A Principal Distribution Amount will be distributed to the holders of the Class A-1 Certificates and the Class A-2 Certificates to the extent of their respective group-based principal distribution amount.

Class M Principal Distribution Amount:		Unless the Class A Certificates have been reduced to zero, the Mezzanine Certificates will generally not receive any principal payments until the Stepdown Date. On or after the Stepdown Date (if no Trigger Event is in effect), principal will be paid to the Mezzanine Certificates, first to the Class M-1 Certificates until it reaches approximately a 45.40% Credit Enhancement Percentage (2x the Class M-1 Target Credit Enhancement Percentage), second to the Class M-2 Certificates, until it reaches approximately a 35.50% Credit Enhancement Percentage (2x the Class M-2 Target Credit Enhancement Percentage), third to the Class M-3 Certificates until it reaches approximately a 31.00% Credit Enhancement Percentage (2x the Class M-3 Target Credit Enhancement Percentage), fourth to the Class M-4 Certificates until it reaches approximately a 26.20% Credit Enhancement Percentage (2x the Class M-4 Target Credit Enhancement Percentage), fifth to the Class M-5 Certificates until it reaches approximately a 22.90% Credit Enhancement Percentage (2x the Class M-5 Target Credit Enhancement Percentage), sixth to the Class M-6 Certificates, until it reaches approximately a 20.20% Credit Enhancement Percentage (2x the Class M-6 Target Credit Enhancement Percentage), seventh to the Class M-7 Certificates until it reaches approximately a 17.60% Credit Enhancement Percentage (2x the Class M-7 Target Credit Enhancement Percentage), eighth to the Class M-8 Certificates until it reaches approximately a 15.50% Credit Enhancement Percentage (2x the Class M-8 Target Credit Enhancement Percentage), ninth to the Class M-9 Certificates, until it reaches approximately a 13.30% Credit Enhancement Percentage (2x the Class M-9 Target Credit Enhancement Percentage, and tenth to the Class M-10 Certificates, until it reaches approximately a 10.90% Credit Enhancement Percentage (2x the Class M-10 Target Credit Enhancement Percentage.

Coupon Step-up:		On the Distribution Date following the first possible optional termination date, the margin on the Certificates will increase to the following, subject to the applicable Net WAC Pass-Through Rate.

		Class	After Optional Termination
		A-1 Certificates and A-2 Certificates	2 x Margin

		Mezzanine Certificates	The lesser of 1.5 x Margin and Margin plus 0.50%


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Trigger Event:		If either the Delinquency Test or Cumulative Loss Test is violated.

Delinquency Test:		The determination on any Distribution Date that the percentage obtained by dividing (x) the principal amount of (1) Mortgage Loans delinquent 60 days or more, (2) Mortgage Loans in foreclosure, (3) REO Properties and (4) Mortgage Loans discharged due to bankruptcy by (y) the aggregate principal balance of the Mortgage Loans, in each case, as of the last day of the previous calendar month, exceeds 14.40%.

Cumulative Loss Test:		The determination on any Distribution Date that the aggregate amount of Realized Losses incurred since the Cut-off Date through the last day of the related Due Period divided by the aggregate principal balance of the Mortgage Loans as of the Cut-off Date exceeds the applicable percentages set forth below with respect to such Distribution Date:

		Distribution Date Occurring in		Percentage
		March 2009 to February 2010		3.05%, plus 1/12th of 2.70% for each month thereafter
		March 2010 to February 2011		5.75%, plus 1/12th of 1.75% for each month thereafter
		March 2011 to February 2012		7.50%, plus 1/12th of 1.50% for each month thereafter
		March 2012 to February 2013		9.00%, plus 1/12th of 0.50% for each month thereafter
		March 2013 and thereafter		9.50%


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Transaction Overview (Cont.)

Payment Priority:	I. On each Distribution Date, the Available Distribution Amount will be distributed as follows:
	1.	To the Supplemental Interest Trust, to pay any Net Swap Payment or the Swap Termination Payment (not caused by a Swap Provider Trigger Event (as defined in the Swap Agreement)) owed to the Swap Provider.
	2.	(A) To pay interest to the Class A Certificates, including any accrued unpaid interest from a prior Distribution Date; on a pro rata basis, based on the entitlement of each such class.
		(B) to pay interest excluding any accrued unpaid interest from a prior Distribution Date to the Mezzanine Certificates, on a sequential basis.
	3.	To pay principal to the Class A Certificates in accordance with the principal payment provisions described above under “Class A Principal Distribution Amount”.
	4.	To pay principal to the Mezzanine Certificates in accordance with the principal payment provisions described above under “Class M Principal Distribution Amount”.
	5.	From excess interest and any Overcollateralization Reduction Amount, if any, to the certificates then entitled to receive distributions in respect of principal in order to reduce the Certificate Principal Balance of the certificates to the extent necessary to restore or maintain the Required Overcollateralization Amount.
	6.	From excess interest and any Overcollateralization Reduction Amount, if any, to pay the Interest Carry Forward Amounts on the Mezzanine Certificates, in the same priority as 2(B) above.
	7.	From excess interest and any Overcollateralization Reduction Amount, if any, to pay the allocated Realized Losses on the Mezzanine Certificates, in the same priority as 2(B) above.
	8.	From excess interest and any Overcollateralization Reduction Amount, if any, to pay the Net WAC Rate Carryover Amount on the Class A Certificates and the Mezzanine Certificates in the same order of priority as described in 2 above.
	9.	From excess interest and any Overcollateralization Reduction Amount, if any, to pay the Swap Termination Payment (caused by a Swap Provider Trigger Event) owed to the Swap Provider.
	10.	To pay any remaining amount to the non-offered certificates identified in, and in accordance with the provisions of, the Pooling and Servicing Agreement.
Payment Priority (continued):	II. Commencing on the Distribution Date in September 2007, any Net Swap Payments on deposit to the Supplemental Interest Trust will be paid after the distribution of the Available Distribution Amount as follows:
	1.	To the Supplemental Interest Trust, to pay any Net Swap Payment or the Swap Termination Payment (not caused by a Swap Provider Trigger Event (as defined in the Swap Agreement)) owed to the Swap Provider.
	2.	To pay any unpaid interest on the Class A Certificates including any accrued unpaid interest from a prior Distribution Date, on a pro rata basis based on entitlement of such class, then to pay any unpaid interest including any accrued unpaid interest from prior Distribution Dates to the Mezzanine Certificates, sequentially.
	3.	To pay any principal to the Offered Certificates in accordance with the principal payment provisions described above in an amount necessary to restore or maintain the Required Overcollateralization Amount.*
	4.	To pay any allocated Realized Losses* remaining unpaid on the Mezzanine Certificates, sequentially.
	5.	To pay the Net WAC Rate Carryover Amount on the Offered Certificates remaining unpaid in the same order of priority as described above.
	6.	To pay the Swap Termination Payment (caused by a Swap Provider Trigger Event under the Swap Agreement) owed to the Swap Provider.
	7.	To pay any remaining amount to the Class CE-1 Certificates.
	* Notwithstanding the foregoing, the cumulative amount paid pursuant to clauses 3 and 4 shall at no time be permitted to exceed the cumulative amount of realized losses incurred on the Mortgage Loans from and after the Cut-Off Date

	Commencing on the Distribution Date in September 2007, amounts payable by the trust to the Securities Administrator in respect of Net Swap Payments and Swap Termination Payments other than Swap Termination Payments resulting from a Swap Provider Trigger Event (and to the extent not paid by the Securities Administrator from any upfront payment received pursuant to any replacement interest rate swap agreement that may be entered into by the Supplemental Interest Trust Trustee) will be deducted from related available funds before distributions to the holders of the Offered Certificates. On or before each Distribution Date commencing on the Distribution Date occurring in September 2007, such amounts will be distributed by the trust to the Securities Administrator, and paid by the Securities Administrator to the Swap Provider as follows:


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1



		(i)	first, to make any Net Swap Payment owed to the Swap Provider pursuant to the Interest Rate Swap Agreement for such Distribution Date, and

		(ii)	second, to make any Swap Termination Payment not due to a Swap Provider Trigger Event owed to the Swap Provider pursuant to the Swap Agreement (to the extent not paid by the Securities Administrator from any upfront payment received pursuant to any replacement interest rate swap agreement that may be entered into by the Securities Administrator).

ERISA:	It is expected that the Offered Certificates may be purchased by, or with the assets of, employee benefit plans subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”) or plans or arrangements subject to section 4975 of the Internal Revenue Code (each, a “Plan”). Prior to the termination of the Supplemental Interest Trust, Plans or persons using assets of a Plan may purchase the Offered Certificates if the purchase and holding meets the requirements of an investor-based class exemption issued by the Department of Labor. Investors should consult with their counsel with respect to the consequences under ERISA and the Internal Revenue Code of a Plan’s acquisition and ownership of such certificates.

Taxation - REMIC:	One or more REMIC elections will be made for designated portions of the Trust (exclusive of certain shortfall payments or payments from the Supplemental Interest Trust or the obligation to make payments to the Supplemental Interest Trust pursuant to the Swap Agreement).

Form of Registration:	Book-entry form through DTC, Clearstream and Euroclear.

Minimum Denominations:	$25,000 and integral multiples of $1 in excess thereof.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Swap Schedule

Distribution Date	Notional Schedule ($)	Distribution Date	Notional Schedule ($)
9/25/2007	281,893,162	8/25/2011	28,952,803
10/25/2007	268,595,515	9/25/2011	27,580,806
11/25/2007	255,924,198	10/25/2011	26,273,661
12/25/2007	243,849,746	11/25/2011	25,028,261
1/25/2008	232,344,080	12/25/2011	23,841,517
2/25/2008	221,380,438	1/25/2012	22,710,896
3/25/2008	210,933,319	2/25/2012	21,633,748
4/25/2008	200,978,418
5/25/2008	191,492,573
6/25/2008	182,453,713
7/25/2008	173,840,801
8/25/2008	165,633,792
9/25/2008	157,813,582
10/25/2008	150,361,966
11/25/2008	143,261,593
12/25/2008	136,495,931
1/25/2009	130,049,222
2/25/2009	123,906,451
3/25/2009	118,053,309
4/25/2009	112,476,159
5/25/2009	107,162,006
6/25/2009	102,098,466
7/25/2009	97,273,738
8/25/2009	92,676,576
9/25/2009	88,296,261
10/25/2009	84,122,580
11/25/2009	80,145,802
12/25/2009	76,356,651
1/25/2010	72,746,287
2/25/2010	69,306,290
3/25/2010	66,028,631
4/25/2010	62,905,663
5/25/2010	59,930,097
6/25/2010	57,094,986
7/25/2010	54,393,712
8/25/2010	51,819,967
9/25/2010	49,367,742
10/25/2010	47,031,307
11/25/2010	44,805,205
12/25/2010	42,684,235
1/25/2011	40,663,440
2/25/2011	38,738,098
3/25/2011	36,903,708
4/25/2011	35,155,981
5/25/2011	33,490,831
6/25/2011	31,904,363
7/25/2011	30,392,865


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Sensitivity Table

To 10% Call

		0% CPR	20% CPR	35% CPR	45% CPR	55% CPR

A-1	Avg Life	13.55	2.94	1.19	0.87	0.66
	First Payment Date	Mar-07	Mar-07	Mar-07	Mar-07	Mar-07
	Last Payment Date	Jan-28	Feb-17	Feb-10	Apr-09	Oct-08

A-2	Avg Life	13.97	2.96	1.19	0.87	0.66
	First Payment Date	Mar-07	Mar-07	Mar-07	Mar-07	Mar-07
	Last Payment Date	Jan-28	Feb-17	Feb-10	Apr-09	Oct-08

M-1	Avg Life	16.12	6.52	5.00	3.60	2.52
	First Payment Date	Oct-21	Mar-10	Feb-10	Apr-09	Oct-08
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-2	Avg Life	16.12	6.52	5.05	3.64	2.83
	First Payment Date	Oct-21	Mar-10	Aug-11	May-10	Sep-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-3	Avg Life	16.12	6.52	4.55	3.29	2.56
	First Payment Date	Oct-21	Mar-10	Apr-11	Feb-10	Jun-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-4	Avg Life	16.12	6.52	4.34	3.14	2.43
	First Payment Date	Oct-21	Mar-10	Dec-10	Dec-09	Apr-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-5	Avg Life	16.12	6.52	4.21	3.04	2.34
	First Payment Date	Oct-21	Mar-10	Oct-10	Oct-09	Mar-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Sensitivity Table

To 10% Call (Continued)

		0% CPR	20% CPR	35% CPR	45% CPR	55% CPR

M-6	Avg Life	16.12	6.52	4.13	2.99	2.30
	First Payment Date	Oct-21	Mar-10	Sep-10	Sep-09	Feb-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-7	Avg Life	16.12	6.52	4.07	2.95	2.26
	First Payment Date	Oct-21	Mar-10	Aug-10	Aug-09	Feb-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-8	Avg Life	16.12	6.52	4.02	2.90	2.23
	First Payment Date	Oct-21	Mar-10	Jul-10	Aug-09	Jan-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-9	Avg Life	16.12	6.52	3.99	2.88	2.21
	First Payment Date	Oct-21	Mar-10	Jun-10	Jul-09	Jan-09
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10

M-10	Avg Life	16.12	6.52	3.95	2.86	2.18
	First Payment Date	Oct-21	Mar-10	Jun-10	Jul-09	Dec-08
	Last Payment Date	Jan-28	Feb-17	Jun-12	Dec-10	Jan-10


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Sensitivity Table

To Maturity

		0% CPR	20% CPR	35% CPR	45% CPR	55% CPR

A-1	Avg Life	13.80	3.11	1.19	0.87	0.66
	First Payment Date	Mar-07	Mar-07	Mar-07	Mar-07	Mar-07
	Last Payment Date	May-36	Oct-21	Feb-10	Apr-09	Oct-08

A-2	Avg Life	14.30	3.14	1.19	0.87	0.66
	First Payment Date	Mar-07	Mar-07	Mar-07	Mar-07	Mar-07
	Last Payment Date	Jul-36	Dec-21	Feb-10	Apr-09	Oct-08

M-1	Avg Life	17.12	7.08	7.20	5.25	3.67
	First Payment Date	Oct-21	Mar-10	Feb-10	Apr-09	Oct-08
	Last Payment Date	Apr-36	Oct-21	Mar-19	Dec-15	Sep-13

M-2	Avg Life	17.12	7.08	5.50	3.98	3.14
	First Payment Date	Oct-21	Mar-10	Aug-11	May-10	Sep-09
	Last Payment Date	Mar-36	Oct-21	Jun-17	Aug-14	Oct-12

M-3	Avg Life	17.11	7.08	4.93	3.57	2.76
	First Payment Date	Oct-21	Mar-10	Apr-11	Feb-10	Jun-09
	Last Payment Date	Dec-35	Oct-21	Nov-16	Mar-14	Jun-12

M-4	Avg Life	17.11	7.08	4.71	3.42	2.63
	First Payment Date	Oct-21	Mar-10	Dec-10	Dec-09	Apr-09
	Last Payment Date	Oct-35	Oct-21	Jul-16	Dec-13	Apr-12

M-5	Avg Life	17.10	7.08	4.57	3.31	2.54
	First Payment Date	Oct-21	Mar-10	Oct-10	Oct-09	Mar-09
	Last Payment Date	Aug-35	Oct-21	Mar-16	Sep-13	Feb-12


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Sensitivity Table

To Maturity (Continued)

		0% CPR	20% CPR	35% CPR	45% CPR	55% CPR

M-6	Avg Life	17.09	7.08	4.47	3.24	2.49
	First Payment Date	Oct-21	Mar-10	Sep-10	Sep-09	Feb-09
	Last Payment Date	Jun-35	Oct-21	Nov-15	Jun-13	Dec-11

M-7	Avg Life	17.08	7.08	4.40	3.19	2.44
	First Payment Date	Oct-21	Mar-10	Aug-10	Aug-09	Feb-09
	Last Payment Date	Mar-35	Oct-21	Aug-15	Apr-13	Oct-11

M-8	Avg Life	17.07	7.07	4.34	3.14	2.40
	First Payment Date	Oct-21	Mar-10	Jul-10	Aug-09	Jan-09
	Last Payment Date	Dec-34	Oct-21	Apr-15	Jan-13	Aug-11

M-9	Avg Life	17.05	7.05	4.28	3.10	2.37
	First Payment Date	Oct-21	Mar-10	Jun-10	Jul-09	Jan-09
	Last Payment Date	Sep-34	Sep-21	Jan-15	Nov-12	Jun-11

M-10	Avg Life	17.01	7.00	4.22	3.06	2.33
	First Payment Date	Oct-21	Mar-10	Jun-10	Jul-09	Dec-08
	Last Payment Date	May-34	Feb-21	Aug-14	Aug-12	Mar-11


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Effective Available Funds Schedule*			Effective Available Funds Schedule*
Period	Date	Net WAC Pass-Through Rate Cap 1 (%)	Period	Date	Net WAC Pass-Through Rate Cap 1 (%)
1	3/25/2007	12.596	46	12/25/2010	19.060
2	4/25/2007	10.158	47	1/25/2011	18.717
3	5/25/2007	10.497	48	2/25/2011	18.615
4	6/25/2007	10.158	49	3/25/2011	19.295
5	7/25/2007	10.497	50	4/25/2011	18.414
6	8/25/2007	10.158	51	5/25/2011	18.561
7	9/25/2007	24.010	52	6/25/2011	18.218
8	10/25/2007	24.027	53	7/25/2011	18.369
9	11/25/2007	23.681	54	8/25/2011	18.026
10	12/25/2007	23.705	55	9/25/2011	17.932
11	1/25/2008	23.359	56	10/25/2011	18.090
12	2/25/2008	23.201	57	11/25/2011	17.747
13	3/25/2008	23.441	58	12/25/2011	17.910
14	4/25/2008	22.891	59	1/25/2012	17.567
15	5/25/2008	22.933	60	2/25/2012	17.478
16	6/25/2008	22.588	61	3/25/2012	10.865
17	7/25/2008	22.637	62	4/25/2012	10.164
18	8/25/2008	22.292	63	5/25/2012	10.503
19	9/25/2008	22.147	64	6/25/2012	10.165
20	10/25/2008	22.206
21	11/25/2008	21.862
22	12/25/2008	21.928
23	1/25/2009	21.583
24	2/25/2009	21.446
25	3/25/2009	21.990
26	4/25/2009	21.178
27	5/25/2009	21.260
28	6/25/2009	20.916
29	7/25/2009	21.004
30	8/25/2009	20.660
31	9/25/2009	20.534
32	10/25/2009	20.632
33	11/25/2009	20.287
34	12/25/2009	20.391
35	1/25/2010	20.047
36	2/25/2010	19.928
37	3/25/2010	20.545
38	4/25/2010	19.696
39	5/25/2010	19.813
40	6/25/2010	19.469
41	7/25/2010	19.591
42	8/25/2010	19.248				*CPR: 35%
43	9/25/2010	19.139				*Effective AFC is ACT/360 day count
44	10/25/2010	19.269				*1 Month Libor: 20%
45	11/25/2010	18.926				*Includes Net Swap Payments received from the Swap Provider


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Effective Available Funds Schedule*			Effective Available Funds Schedule*
Period	Date	Net WAC Pass-Through Rate Cap 2 (%)	Period	Date	Net WAC Pass-Through Rate Cap 2 (%)
1	3/25/2007	13.468	46	12/25/2010	19.784
2	4/25/2007	10.861	47	1/25/2011	19.417
3	5/25/2007	11.223	48	2/25/2011	19.314
4	6/25/2007	10.861	49	3/25/2011	20.070
5	7/25/2007	11.223	50	4/25/2011	19.113
6	8/25/2007	10.861	51	5/25/2011	19.283
7	9/25/2007	24.713	52	6/25/2011	18.917
8	10/25/2007	24.753	53	7/25/2011	19.091
9	11/25/2007	24.383	54	8/25/2011	18.725
10	12/25/2007	24.431	55	9/25/2011	18.631
11	1/25/2008	24.061	56	10/25/2011	18.812
12	2/25/2008	23.903	57	11/25/2011	18.446
13	3/25/2008	24.191	58	12/25/2011	18.632
14	4/25/2008	23.593	59	1/25/2012	18.266
15	5/25/2008	23.659	60	2/25/2012	18.177
16	6/25/2008	23.290	61	3/25/2012	11.612
17	7/25/2008	23.363	62	4/25/2012	10.863
18	8/25/2008	22.994	63	5/25/2012	11.225
19	9/25/2008	22.849	64	6/25/2012	10.863
20	10/25/2008	22.932
21	11/25/2008	22.563
22	12/25/2008	22.653
23	1/25/2009	22.285
24	2/25/2009	22.148
25	3/25/2009	22.767
26	4/25/2009	21.879
27	5/25/2009	21.985
28	6/25/2009	21.617
29	7/25/2009	21.729
30	8/25/2009	21.361
31	9/25/2009	21.235
32	10/25/2009	21.356
33	11/25/2009	20.988
34	12/25/2009	21.115
35	1/25/2010	20.747
36	2/25/2010	20.629
37	3/25/2010	21.321
38	4/25/2010	20.396
39	5/25/2010	20.537
40	6/25/2010	20.169
41	7/25/2010	20.315
42	8/25/2010	19.948				*CPR: 35%
43	9/25/2010	19.839				*Effective AFC is ACT/360 day count
44	10/25/2010	19.992				*1 Month Libor: 20%
45	11/25/2010	19.625				*Includes Net Swap Payments received from the Swap Provider


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Effective Available Funds Schedule*			Effective Available Funds Schedule*
Period	Date	Net WAC Pass-Through Rate Mezz (%)	Period	Date	Net WAC Pass-Through Rate Mezz (%)
1	3/25/2007	13.312	46	12/25/2010	19.655
2	4/25/2007	10.736	47	1/25/2011	19.293
3	5/25/2007	11.093	48	2/25/2011	19.190
4	6/25/2007	10.736	49	3/25/2011	19.932
5	7/25/2007	11.093	50	4/25/2011	18.989
6	8/25/2007	10.736	51	5/25/2011	19.155
7	9/25/2007	24.588	52	6/25/2011	18.793
8	10/25/2007	24.623	53	7/25/2011	18.963
9	11/25/2007	24.258	54	8/25/2011	18.601
10	12/25/2007	24.301	55	9/25/2011	18.507
11	1/25/2008	23.936	56	10/25/2011	18.684
12	2/25/2008	23.778	57	11/25/2011	18.322
13	3/25/2008	24.057	58	12/25/2011	18.504
14	4/25/2008	23.467	59	1/25/2012	18.142
15	5/25/2008	23.529	60	2/25/2012	18.053
16	6/25/2008	23.164	61	3/25/2012	11.479
17	7/25/2008	23.233	62	4/25/2012	10.739
18	8/25/2008	22.869	63	5/25/2012	11.097
19	9/25/2008	22.723	64	6/25/2012	10.739
20	10/25/2008	22.802
21	11/25/2008	22.438
22	12/25/2008	22.523
23	1/25/2009	22.159
24	2/25/2009	22.023
25	3/25/2009	22.628
26	4/25/2009	21.754
27	5/25/2009	21.855
28	6/25/2009	21.492
29	7/25/2009	21.599
30	8/25/2009	21.236
31	9/25/2009	21.110
32	10/25/2009	21.227
33	11/25/2009	20.863
34	12/25/2009	20.985
35	1/25/2010	20.622
36	2/25/2010	20.504
37	3/25/2010	21.183
38	4/25/2010	20.272
39	5/25/2010	20.408
40	6/25/2010	20.045
41	7/25/2010	20.186
42	8/25/2010	19.823				*CPR: 35%
43	9/25/2010	19.715				*Effective AFC is ACT/360 day count
44	10/25/2010	19.864				*1 Month Libor: 20%
45	11/25/2010	19.501				*Includes Net Swap Payments received from the Swap Provider


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Excess Spread*

(Assumes Pricing Prepayment Speed, Excludes Basis Risk Shortfalls)

Period	Excess Spread in bp (Static LIBOR)	Excess Spread in 1 Month Forward LIBOR (%)	Excess Spread in bp (Forward LIBOR)	Period	Excess Spread in bp (Static LIBOR)	Excess Spread in 1 Month Forward LIBOR (%)	Excess Spread in bp (Forward LIBOR)
1	659	5.3198	659	45	555	4.9333	568
2	551	5.3452	549	46	564	4.9304	576
3	570	5.3426	568	47	557	4.9276	570
4	552	5.3289	551	48	557	4.9256	570
5	570	5.3248	570	49	582	5.0229	591
6	553	5.3197	553	50	558	5.0242	568
7	573	5.2644	573	51	567	5.0241	577
8	575	5.2543	575	52	558	5.0250	569
9	574	5.2414	574	53	567	5.0243	577
10	576	5.1661	576	54	558	5.0246	569
11	574	5.0980	575	55	558	5.0245	569
12	574	5.0991	575	56	567	5.0240	578
13	580	5.0268	581	57	558	5.0247	570
14	575	4.9915	577	58	567	5.0233	579
15	578	4.9552	580	59	558	5.0232	570
16	576	4.9241	578	60	558	5.0233	570
17	579	4.8899	582	61	583	5.0889	603
18	576	4.8554	580	62	547	5.0905	568
19	577	4.8243	581	63	565	5.0917	586
20	581	4.7913	586	64	547	5.0921	568
21	577	4.7586	583
22	582	4.7276	588
23	578	4.6962	586
24	579	4.6636	587
25	593	4.8964	597
26	580	4.8963	586
27	585	4.8845	591
28	581	4.8743	587
29	587	4.8633	593
30	583	4.8523	589
31	583	4.8421	590
32	589	4.8301	596
33	585	4.8205	593
34	591	4.8099	599
35	587	4.7987	595
36	588	4.7887	596
37	607	4.9341	612
38	569	4.9512	577
39	556	4.9485	564
40	527	4.9470	538
41	543	4.9434	553
42	543	4.9413	554
43	550	4.9390	562
44	562	4.9356	574

*Includes Net Swap Payments

*Excess Spread is on a 30/360 day count.


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

Breakeven CDR Table for the Subordinated Certificates

The assumptions for the breakeven CDR table below are as follows:

- Pricing speed prepayment assumption

- 10% cleanup call is exercised

- Forward Curves

- 100% Severity

- Interest & Principal advancing

- 3 month recovery lag

- Breakevens are shown at the loss before the referenced Class first incurs a writedown

Class	CDR Break-Even (%)	Cumulative Loss (%)
M-1	19.36	29.54
M-2	15.51	25.09
M-3	13.95	23.03
M-4	12.35	20.82
M-5	11.22	19.34
M-6	10.39	18.06
M-7	9.56	16.84
M-8	8.91	15.89
M-9	8.26	14.91
M-10	7.65	13.89


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

SUMMARY - AGGREGATE POOL**
Number of Mortgage Loans:	6,457	Property Type:
Aggregate Principal Balance:	$376,674,430	Single Family:	57.08%
Conforming Balance:*	$358,604,394	PUD:	24.99%
Average Principal Balance:	$58,336	2-4 Family:	8.43%
Range:	$382 - $498,510	Condo:	9.16%
W.A. Coupon:	11.622%	Townhouse:	0.34%
Range:	6.500% - 20.625%	Occupancy Status:
W.A. Remaining Term (Months):	203	Primary:	75.66%
Range (Months):	116 - 360	Investment:	19.76%
W.A. Seasoning (Months):	4	Second Home:	4.58%
Latest Maturity Date:	February 1, 2037	Documentation Status:
State Concentration (Top 5):		Full:	13.66%
California:	28.68%	Stated:	50.32%
Florida:	10.27%	Limited:	0.89%
Arizona:	6.59%	No Documentation:	35.12%
Nevada:	6.41%	W.A. Prepayment Term (Months):	27
Texas:	4.59%	Loans with Prepayment Penalties:	23.36%
W.A. Original Combined LTV:	96.48%	Interest Only Loans:	1.90%
Range:	33.12% - 100.00%	W.A. Interest Only Term (Months):	69
First Liens:	0.00%
Second Liens:	100.00%
Non-Balloon Loans:	16.78%
W.A. FICO:	701
Index Type:
Fixed Rate:	100.00%

*	Based on the 2007 ‘Second Mortgages’ loan limits only

**	Unless otherwise stated, all percentages are based on Aggregate Principal Balance as of the Cutoff Date


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Originator
Originator	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
American Home Mortgage		1,271		80,644,110		21.41		12.247		703		96.30
GMAC		1,668		78,521,877		20.85		11.416		714		93.68
Chapel		862		62,080,036		16.48		11.109		695		97.55
Mortgage IT		398		25,209,412		6.69		10.827		702		95.50
Other		2,258		130,218,995		34.57		11.757		696		97.95
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Product Type
Product Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Fixed - 10 Year		2		86,028		0.02		9.390		699		85.07
Fixed - 15 Year		157		5,787,304		1.54		11.502		699		89.98
Fixed - 20 Year		33		1,250,842		0.33		11.986		696		97.30
Fixed - 25 Year		4		198,670		0.05		10.267		682		84.19
Fixed - 25 Year IO		44		2,187,950		0.58		11.432		721		94.27
Fixed - 30 Year		906		49,058,808		13.02		12.164		693		98.23
Fixed - 30 Year IO		62		4,626,655		1.23		11.857		719		97.41
Balloon - 15/30		5,239		312,689,404		83.01		11.536		703		96.33
Balloon - 15/30 IO		5		333,700		0.09		13.293		676		92.83
Balloon - 30/40		5		455,068		0.12		11.169		666		99.01
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Principal Balance at Origination

Principal Balance at Origination ($)	Number of Initial Mortgage Loans	Aggregate Remaining Principal Balance ($)	% of Aggregate Remaining Principal Balance	W.A. Coupon (%)	W.A. Non-Zero FICO	W.A. Original CLTV (%)
0.01 - 50,000.00	3,447	109,743,525	29.13	11.860	701	96.14
50,000.01 - 100,000.00	2,284	160,832,316	42.70	11.548	699	96.87
100,000.01 - 150,000.00	523	63,306,256	16.81	11.436	702	97.88
150,000.01 - 200,000.00	136	23,862,919	6.34	11.998	701	95.61
200,000.01 - 250,000.00	31	7,072,300	1.88	11.037	717	96.10
250,000.01 - 300,000.00	16	4,390,330	1.17	10.935	719	95.10
300,000.01 - 350,000.00	9	3,020,912	0.80	10.921	733	85.81
350,000.01 - 400,000.00	8	3,095,114	0.82	11.693	705	83.99
400,000.01 - 450,000.00	2	852,247	0.23	10.468	745	92.54
450,000.01 - 500,000.00	1	498,510	0.13	8.650	798	74.07
Total:	6,457	376,674,430	100.00	11.622	701	96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Remaining Principal Balance
Remaining Principal Balance ($)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0.01 - 50,000.00		3,455		110,053,872		29.22		11.858		701		96.12
50,000.01 - 100,000.00		2,279		160,767,350		42.68		11.549		699		96.89
100,000.01 - 150,000.00		521		63,119,564		16.76		11.437		702		97.87
150,000.01 - 200,000.00		135		23,804,231		6.32		11.998		701		95.61
200,000.01 - 250,000.00		31		7,072,300		1.88		11.037		717		96.10
250,000.01 - 300,000.00		16		4,390,330		1.17		10.935		719		95.10
300,000.01 - 350,000.00		9		3,020,912		0.80		10.921		733		85.81
350,000.01 - 400,000.00		8		3,095,114		0.82		11.693		705		83.99
400,000.01 - 450,000.00		2		852,247		0.23		10.468		745		92.54
450,000.01 - 500,000.00		1		498,510		0.13		8.650		798		74.07
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Remaining Term
Months Remaining	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
61 - 120		2		86,028		0.02		9.390		699		85.07
121 - 180		5,401		318,810,408		84.64		11.537		702		96.21
181 - 240		33		1,250,842		0.33		11.986		696		97.30
241 - 300		48		2,386,620		0.63		11.335		718		93.43
301 - 360		973		54,140,532		14.37		12.129		695		98.17
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Interest Only Term
IO Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		6,346		369,526,125		98.10		11.618		701		96.48
60		101		6,065,296		1.61		11.642		717		95.95
120		10		1,083,009		0.29		12.646		722		97.83
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Mortgage Rate
Mortgage Rate (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
6.500 - 6.999		5		244,135		0.06		6.683		729		96.95
7.000 - 7.499		29		1,641,112		0.44		7.242		724		86.72
7.500 - 7.999		51		3,088,659		0.82		7.767		733		92.59
8.000 - 8.499		80		4,429,572		1.18		8.203		741		93.97
8.500 - 8.999		152		10,340,210		2.75		8.717		731		91.57
9.000 - 9.499		234		16,095,888		4.27		9.193		724		94.95
9.500 - 9.999		681		38,262,806		10.16		9.753		719		94.26
10.000 - 10.499		495		29,444,649		7.82		10.165		706		95.43
10.500 - 10.999		756		50,093,325		13.30		10.785		696		97.31
11.000 - 11.499		503		31,943,174		8.48		11.174		696		97.29
11.500 - 11.999		543		33,239,499		8.82		11.713		696		96.72
12.000 - 12.499		551		31,581,222		8.38		12.179		697		96.99
12.500 - 12.999		776		45,157,810		11.99		12.676		698		97.19
13.000 - 13.499		481		24,714,484		6.56		13.146		700		97.51
13.500 - 13.999		351		16,775,365		4.45		13.671		693		97.17
14.000 - 14.499		256		12,350,481		3.28		14.186		683		98.40
14.500 - 14.999		221		12,767,619		3.39		14.649		687		98.12
15.000 - 15.499		101		5,154,622		1.37		15.165		682		97.33
15.500 - 15.999		74		3,692,322		0.98		15.708		674		97.91
16.000 - 16.499		35		1,847,606		0.49		16.191		685		98.11
16.500 - 16.999		18		993,635		0.26		16.595		705		99.56
17.000 - 17.499		20		719,664		0.19		17.119		699		98.97
17.500 - 17.999		25		995,634		0.26		17.732		668		100.00
18.000 - 18.499		8		463,467		0.12		18.266		687		99.16
18.500 - 18.999		7		443,998		0.12		18.645		661		98.99
19.000 - 19.499		1		51,396		0.01		19.000		688		100.00
19.500 - 19.999		1		56,686		0.02		19.625		716		100.00
20.000 - 20.499		1		23,997		0.01		20.000		672		95.00
20.500 - 20.999		1		61,393		0.02		20.625		684		100.00
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Original Combined Loan-to-Value Ratio
Original Combined Loan-to-Value Ratio (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Less than or equal to 50.00		11		761,983		0.20		9.833		691		41.65
50.01 - 55.00		3		168,637		0.04		8.715		737		54.47
55.01 - 60.00		13		813,183		0.22		9.246		703		58.81
60.01 - 65.00		9		447,903		0.12		9.668		668		62.43
65.01 - 70.00		22		1,613,585		0.43		9.964		686		67.77
70.01 - 75.00		32		3,830,595		1.02		10.261		701		73.42
75.01 - 80.00		111		7,679,964		2.04		9.938		701		79.16
80.01 - 85.00		129		6,709,431		1.78		10.578		694		83.71
85.01 - 90.00		876		40,888,758		10.86		11.221		703		89.59
90.01 - 95.00		1,313		65,975,582		17.52		12.010		708		94.76
95.01 - 100.00		3,938		247,784,808		65.78		11.716		700		99.88
Total:		6,457		376,674,430		100.00		11.622		701		96.48

FICO Score at Origination
FICO Score at Origination	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
575 - 599		30		1,393,503		0.37		11.471		588		99.72
600 - 624		156		8,614,162		2.29		12.533		618		97.15
625 - 649		633		36,554,953		9.70		12.872		637		96.83
650 - 674		1,055		62,923,568		16.71		11.951		663		96.12
675 - 699		1,448		86,110,442		22.86		11.617		687		96.04
700 - 724		1,141		66,715,869		17.71		11.234		712		96.78
725 - 749		940		53,001,952		14.07		11.225		736		96.83
750 - 774		626		36,736,562		9.75		11.239		761		96.59
775 - 799		354		20,194,038		5.36		11.046		786		96.45
800 - 824		73		4,392,453		1.17		11.398		805		95.31
825 - 849		1		36,928		0.01		9.625		836		98.50
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Geographic Distribution*
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
California		1,244		108,046,804		28.68		11.017		701		96.01
Florida		671		38,695,052		10.27		12.313		700		95.59
Arizona		440		24,836,041		6.59		11.723		700		97.02
Nevada		380		24,136,716		6.41		11.703		702		97.67
Texas		495		17,305,474		4.59		11.340		714		97.43
Virginia		212		14,174,571		3.76		11.751		702		97.02
Illinois		268		13,765,797		3.65		11.751		697		97.53
Maryland		195		12,956,805		3.44		11.606		694		97.87
Washington		188		11,532,168		3.06		11.534		702		96.38
New York		139		10,476,303		2.78		11.784		701		95.43
Minnesota		197		9,587,384		2.55		12.199		703		98.18
Colorado		193		9,504,531		2.52		12.046		703		97.74
Oregon		158		8,527,117		2.26		11.474		698		96.23
North Carolina		172		6,674,133		1.77		11.751		703		95.94
Utah		132		6,540,977		1.74		11.896		712		96.28
Georgia		169		6,258,932		1.66		12.352		703		97.61
Massachusetts		89		5,876,911		1.56		11.734		716		95.48
New Jersey		84		5,660,385		1.50		11.803		696		95.77
Connecticut		73		4,511,231		1.20		12.113		702		95.63
Michigan		133		4,491,711		1.19		12.303		684		97.25
Ohio		84		2,840,633		0.75		12.195		693		98.39
Missouri		86		2,764,355		0.73		11.785		704		95.76
Idaho		52		2,726,108		0.72		11.193		715		93.57
South Carolina		60		2,597,749		0.69		12.068		707		96.17
Pennsylvania		71		2,257,899		0.60		12.089		709		95.85
Hawaii		14		2,006,649		0.53		10.660		722		94.68
District of Columbia		21		1,886,093		0.50		11.105		709		89.62
Wisconsin		47		1,567,935		0.42		12.574		699		96.63
New Mexico		38		1,516,576		0.40		12.604		708		96.46
New Hampshire		24		1,391,285		0.37		12.352		701		98.53
Louisiana		37		1,187,007		0.32		13.426		679		96.32
Indiana		41		1,137,541		0.30		12.385		694		96.97
Rhode Island		20		1,053,750		0.28		11.672		687		91.91
Kentucky		22		890,660		0.24		11.840		679		97.89
Tennessee		30		883,850		0.23		12.032		711		97.01
West Virginia		13		785,911		0.21		14.012		661		99.27
Maine		19		657,681		0.17		12.557		701		96.78

*Geographic Distribution continued on the next page


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Geographic Distribution (continued)
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Alaska		11		631,160		0.17		12.373		739		98.16
Kansas		21		609,390		0.16		11.103		706		94.30
Arkansas		14		606,461		0.16		11.834		725		97.34
Oklahoma		23		557,677		0.15		12.248		708		97.49
Alabama		17		448,971		0.12		11.832		685		95.53
Delaware		12		433,598		0.12		12.458		692		97.88
Montana		9		429,135		0.11		12.301		683		99.18
Iowa		11		317,190		0.08		11.381		725		95.12
Vermont		4		213,056		0.06		12.926		717		99.42
Nebraska		7		190,280		0.05		12.318		707		93.46
Wyoming		7		168,991		0.04		13.232		707		94.19
North Dakota		4		146,454		0.04		10.870		748		91.67
Mississippi		4		143,413		0.04		10.728		678		88.47
South Dakota		2		67,928		0.02		16.276		683		100.00
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Occupancy Status
Occupancy Status	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Primary		4,312		284,977,667		75.66		11.198		695		96.63
Investment		1,852		74,436,027		19.76		13.083		722		96.07
Second Home		293		17,260,737		4.58		12.322		718		95.69
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Documentation Type
Documentation Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Stated Documentation		2,246		139,757,434		37.10		11.462		697		96.70
No Ratio		1,530		95,136,541		25.26		11.644		711		96.77
Full Documentation		945		44,818,382		11.90		10.787		701		97.89
No Documentation		712		36,864,563		9.79		11.969		717		92.03
Stated Income/Full Asset		423		26,238,441		6.97		13.106		680		96.58
No Income Verifier		363		20,808,807		5.52		12.068		703		98.25
Full Income/Full Asset		127		6,384,890		1.70		10.814		684		95.60
Limited Documentation		59		3,370,572		0.89		11.015		656		99.50
Stated Income/Stated Asset		41		2,744,000		0.73		12.726		710		96.02
No Income/No Asset		4		294,619		0.08		12.854		720		93.82
Full Income/Stated Asset		7		256,181		0.07		13.389		662		99.17
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Loan Purpose
Loan Purpose	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Purchase		4,970		283,724,276		75.32		11.770		706		98.04
Refinance - Cashout		1,138		74,606,179		19.81		11.187		688		91.57
Refinance - Rate Term		349		18,343,976		4.87		11.100		690		92.19
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE TOTAL COLLATERAL

Property Type
Property Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Single Family Residence		3,718		215,001,262		57.08		11.436		699		96.51
PUD		1,526		94,118,866		24.99		11.614		702		96.61
Condo		620		34,505,002		9.16		11.910		708		96.36
2-4 Family		559		31,768,071		8.43		12.600		712		96.03
Townhouse		34		1,281,230		0.34		11.362		702		96.38
Total:		6,457		376,674,430		100.00		11.622		701		96.48

Original Prepayment Penalty Term
Prepayment Penalty Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		5,066		288,683,299		76.64		11.698		704		96.19
6		30		1,993,452		0.53		12.883		718		96.97
12		134		9,373,454		2.49		11.534		694		95.60
24		603		39,736,043		10.55		11.083		685		99.08
36		620		36,705,595		9.74		11.565		696		96.12
60		4		182,588		0.05		10.350		730		97.68
Total:		6,457		376,674,430		100.00		11.622		701		96.48


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

SUMMARY - GROUP I**
Number of Mortgage Loans:	1,487	Property Type:
Aggregate Principal Balance:	$67,277,963	Single Family:	66.54%
Conforming Balance:*	$67,277,963	PUD:	18.99%
Average Principal Balance:	$45,244	2-4 Family:	5.07%
Range:	$382 - $199,931	Condo:	8.86%
W.A. Coupon:	11.025%	Townhouse:	0.54%
Range:	6.500% - 16.375%	Occupancy Status:
W.A. Remaining Term (Months):	199	Primary:	100.00%
Range (Months):	116 - 360	Investment:	0.00%
W.A. Seasoning (Months):	4	Second Home:	0.00%
Latest Maturity Date:	February 1, 2037	Documentation Status:
State Concentration (Top 5):		Full:	21.95%
California:	17.96%	Stated:	50.16%
Florida:	7.87%	Limited:	0.98%
Arizona:	7.22%	No Documentation:	26.90%
Oregon:	5.58%	W.A. Prepayment Term (Months):	28
Nevada:	5.57%	Loans with Prepayment Penalties:	26.47%
W.A. Original Combined LTV:	94.52%	Interest Only Loans:	1.85%
Range:	33.12% - 100.00%	W.A. Interest Only Term (Months):	60
First Liens:	0.00%
Second Liens:	100.00%
Non-Balloon Loans:	17.48%
W.A. FICO:	684
Index Type:
Fixed Rate:	100.00%

*	Based on the 2007 ‘Second Mortgages’ loan limits only

**	Unless otherwise stated, all percentages are based on Aggregate Principal Balance as of the Cutoff Date


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Originator
Originator	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
GMAC		330		14,357,817		21.34		10.662		691		86.67
American Home Mortgage		301		14,079,895		20.93		11.591		681		95.94
Chapel		266		13,140,412		19.53		10.904		688		96.67
Mortgage IT		132		4,845,962		7.20		11.135		679		93.56
Other		458		20,853,876		31.00		10.943		679		97.82
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Product Type
Product Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Fixed - 10 Year		1		34,077		0.05		8.475		705		62.31
Fixed - 15 Year		59		2,493,240		3.71		10.846		689		84.96
Fixed - 20 Year		13		419,388		0.62		10.973		697		96.61
Fixed - 25 Year		4		198,670		0.30		10.267		682		84.19
Fixed - 25 Year IO		17		687,953		1.02		10.282		707		86.18
Fixed - 30 Year		166		7,496,942		11.14		11.037		679		95.54
Fixed - 30 Year IO		9		427,200		0.63		9.859		717		98.72
Balloon - 15/30		1,215		55,346,398		82.27		11.052		683		94.91
Balloon - 15/30 IO		2		129,000		0.19		11.875		685		98.18
Balloon - 30/40		1		45,095		0.07		10.875		735		89.98
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Principal Balance at Origination
Principal Balance at Origination ($)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0.01 - 50,000.00		1,011		33,566,978		49.89		11.138		681		95.07
50,000.01 - 100,000.00		444		29,431,387		43.75		10.900		685		94.10
100,000.01 - 150,000.00		26		3,212,558		4.78		11.013		698		92.89
150,000.01 - 200,000.00		6		1,067,039		1.59		10.967		700		93.35
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Remaining Principal Balance
Remaining Principal Balance ($)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0.01 - 50,000.00		1,013		33,662,147		50.03		11.133		681		94.99
50,000.01 - 100,000.00		442		29,336,219		43.60		10.904		685		94.19
100,000.01 - 150,000.00		26		3,212,558		4.78		11.013		698		92.89
150,000.01 - 200,000.00		6		1,067,039		1.59		10.967		700		93.35
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Remaining Term
Months Remaining	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
61 - 120		1		34,077		0.05		8.475		705		62.31
121 - 180		1,276		57,968,638		86.16		11.045		684		94.49
181 - 240		13		419,388		0.62		10.973		697		96.61
241 - 300		21		886,623		1.32		10.278		702		85.74
301 - 360		176		7,969,237		11.85		10.973		681		95.68
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Interest Only Term
IO Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		1,459		66,033,809		98.15		11.039		683		94.57
60		28		1,244,153		1.85		10.302		708		91.73
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Mortgage Rate
Mortgage Rate (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
6.500 - 6.999		4		212,556		0.32		6.654		732		97.98
7.000 - 7.499		14		588,024		0.87		7.194		715		84.18
7.500 - 7.999		26		1,450,657		2.16		7.745		724		88.62
8.000 - 8.499		36		1,758,057		2.61		8.187		737		90.60
8.500 - 8.999		63		2,947,289		4.38		8.728		717		85.86
9.000 - 9.499		81		3,314,047		4.93		9.186		716		91.70
9.500 - 9.999		190		8,882,110		13.20		9.738		703		91.57
10.000 - 10.499		151		6,865,358		10.20		10.187		694		92.77
10.500 - 10.999		236		10,879,270		16.17		10.797		681		96.44
11.000 - 11.499		123		5,264,892		7.83		11.179		686		95.88
11.500 - 11.999		134		5,988,011		8.90		11.711		672		96.79
12.000 - 12.499		95		4,286,212		6.37		12.182		660		97.19
12.500 - 12.999		121		5,862,621		8.71		12.688		662		96.44
13.000 - 13.499		75		3,056,785		4.54		13.197		654		97.33
13.500 - 13.999		57		2,255,107		3.35		13.658		658		96.41
14.000 - 14.499		36		1,816,819		2.70		14.196		640		98.57
14.500 - 14.999		24		1,053,079		1.57		14.625		652		99.05
15.000 - 15.499		7		278,487		0.41		15.267		639		99.97
15.500 - 15.999		9		390,699		0.58		15.749		632		99.71
16.000 - 16.499		5		127,882		0.19		16.194		626		100.00
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Original Combined Loan-to-Value Ratio
Original Combined Loan-to-Value Ratio (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Less than or equal to 50.00		8		455,644		0.68		9.527		679		38.90
50.01 - 55.00		3		168,637		0.25		8.715		737		54.47
55.01 - 60.00		11		619,101		0.92		9.191		690		58.52
60.01 - 65.00		6		277,623		0.41		9.398		652		62.06
65.01 - 70.00		14		782,810		1.16		9.721		679		67.56
70.01 - 75.00		14		750,060		1.11		9.497		692		72.58
75.01 - 80.00		43		2,147,733		3.19		9.602		675		78.18
80.01 - 85.00		72		2,786,392		4.14		10.065		686		83.57
85.01 - 90.00		245		8,705,172		12.94		10.669		689		89.36
90.01 - 95.00		223		10,372,923		15.42		11.257		684		94.40
95.01 - 100.00		848		40,211,869		59.77		11.305		683		99.80
Total:		1,487		67,277,963		100.00		11.025		684		94.52

FICO Score at Origination
FICO Score at Origination	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
575 - 599		18		652,193		0.97		11.433		589		99.51
600 - 624		75		3,218,663		4.78		12.172		618		94.98
625 - 649		256		11,633,383		17.29		12.419		637		94.05
650 - 674		363		16,235,501		24.13		11.395		662		94.09
675 - 699		314		13,829,715		20.56		10.788		686		94.99
700 - 724		181		8,694,371		12.92		10.216		712		95.19
725 - 749		144		6,853,962		10.19		10.044		735		94.40
750 - 774		76		3,694,617		5.49		9.799		761		94.11
775 - 799		51		2,021,750		3.01		9.245		785		94.82
800 - 824		8		406,881		0.60		8.629		805		86.14
825 - 849		1		36,928		0.05		9.625		836		98.50
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Geographic Distribution*
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
California		206		12,079,967		17.96		10.632		687		89.45
Florida		122		5,296,815		7.87		11.113		680		91.99
Arizona		117		4,860,123		7.22		11.157		682		96.51
Oregon		77		3,752,548		5.58		10.667		687		94.63
Nevada		77		3,746,995		5.57		10.802		687		96.64
Washington		64		3,562,231		5.29		10.925		687		95.84
Illinois		80		3,464,966		5.15		11.184		677		96.32
Colorado		70		3,235,322		4.81		11.025		690		97.33
Maryland		53		2,770,352		4.12		11.123		686		95.93
Virginia		52		2,659,301		3.95		11.266		690		97.36
Minnesota		51		2,194,637		3.26		11.393		674		98.49
Massachusetts		31		1,833,481		2.73		11.179		686		94.23
Michigan		50		1,518,282		2.26		12.039		665		96.81
Georgia		42		1,513,874		2.25		10.772		694		97.68
North Carolina		38		1,413,670		2.10		10.769		694		96.64
Missouri		34		1,118,320		1.66		11.328		693		96.90
New York		17		1,094,884		1.63		9.891		682		88.37
Utah		28		1,080,643		1.61		12.072		677		95.26
Connecticut		25		1,071,615		1.59		11.173		684		94.94
Texas		33		986,657		1.47		10.796		675		98.65
New Jersey		18		877,584		1.30		11.009		671		93.63
Ohio		23		663,049		0.99		11.948		671		97.70
Pennsylvania		19		584,983		0.87		11.271		714		97.15
Idaho		13		526,137		0.78		10.391		671		92.82
Hawaii		4		502,705		0.75		11.576		708		97.93
Wisconsin		19		500,267		0.74		11.905		682		94.66
Rhode Island		10		482,984		0.72		10.652		683		85.97
South Carolina		12		449,459		0.67		11.471		666		92.19
Kansas		10		366,587		0.54		10.617		693		92.29
Indiana		12		348,154		0.52		11.993		662		97.50
Louisiana		11		311,532		0.46		13.148		645		93.38
New Hampshire		7		281,230		0.42		11.949		660		96.92
Kentucky		9		259,701		0.39		11.176		652		97.91
Maine		8		248,885		0.37		12.645		673		96.25
Montana		5		199,037		0.30		12.050		673		98.23
Alaska		4		197,350		0.29		9.936		713		98.03
Alabama		6		173,664		0.26		11.104		677		100.00

*Geographic Distribution continued on the next page


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Geographic Distribution (continued)
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
New Mexico		5		158,009		0.23		11.344		685		95.03
West Virginia		3		142,599		0.21		13.135		647		99.99
Tennessee		5		133,835		0.20		9.471		704		97.94
Delaware		3		117,455		0.17		10.966		687		98.59
Mississippi		2		116,619		0.17		9.929		667		88.81
Nebraska		4		89,200		0.13		11.872		680		91.71
Oklahoma		2		84,030		0.12		10.345		677		100.00
Wyoming		2		57,885		0.09		12.195		703		98.05
North Dakota		1		52,888		0.08		9.450		751		81.82
Arkansas		1		38,547		0.06		11.250		683		100.00
Vermont		1		37,983		0.06		10.000		739		100.00
Iowa		1		20,921		0.03		9.875		718		100.00
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Occupancy Status

Number of Initial Mortgage Loans

Aggregate Remaining Principal Balance ($)

% of Aggregate Remaining Principal Balance

W.A. Coupon (%)

W.A. Non-Zero FICO

W.A. Original CLTV (%)

Primary

1,487

67,277,963

100.00

11.025

684

94.52

Total:

1,487

67,277,963

100.00

11.025

684

94.52

Documentation Type
Documentation Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Stated Documentation		563		25,441,829		37.82		11.129		685		95.90
Full Documentation		268		11,785,981		17.52		10.081		680		97.03
No Ratio		234		11,127,130		16.54		10.844		699		92.66
No Documentation		166		6,972,467		10.36		11.348		691		84.63
Stated Income/Full Asset		108		5,107,813		7.59		13.031		657		97.01
Full Income/Full Asset		63		2,852,858		4.24		10.054		677		93.82
No Income Verifier		56		2,781,075		4.13		11.215		675		97.49
Limited Documentation		17		660,455		0.98		10.605		638		99.39
Stated Income/Stated Asset		7		418,744		0.62		11.518		702		99.19
Full Income/Stated Asset		5		129,611		0.19		13.215		662		98.35
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Loan Purpose
Loan Purpose	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Refinance - Cashout		680		34,082,858		50.66		10.982		682		91.64
Purchase		599		24,998,441		37.16		11.129		686		99.21
Refinance - Rate Term		208		8,196,663		12.18		10.886		683		92.19
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP I COLLATERAL

Property Type
Property Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Single Family Residence		1,018		44,763,975		66.54		11.052		682		94.30
PUD		249		12,775,144		18.99		11.028		682		95.95
Condo		147		5,962,650		8.86		10.889		694		95.26
2-4 Family		66		3,411,615		5.07		10.937		692		90.98
Townhouse		7		364,579		0.54		10.686		681		91.52
Total:		1,487		67,277,963		100.00		11.025		684		94.52

Original Prepayment Penalty Term
Prepayment Penalty Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		1,100		49,471,530		73.53		11.078		684		94.10
6		2		79,090		0.12		11.853		695		100.00
12		27		1,526,610		2.27		10.803		697		91.57
24		182		8,587,490		12.76		10.950		678		99.51
36		175		7,560,335		11.24		10.805		686		92.06
60		1		52,908		0.08		10.125		694		100.00
Total:		1,487		67,277,963		100.00		11.025		684		94.52


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

SUMMARY - GROUP II**
Number of Mortgage Loans:	4,970	Property Type:
Aggregate Principal Balance:	$309,396,467	Single Family:	55.02%
Conforming Balance:*	$291,326,431	PUD:	26.29%
Average Principal Balance:	$62,253	2-4 Family:	9.17%
Range:	$930 - $498,510	Condo:	9.23%
W.A. Coupon:	11.752%	Townhouse:	0.30%
Range:	6.875% - 20.625%	Occupancy Status:
W.A. Remaining Term (Months):	203	Primary:	70.36%
Range (Months):	116 - 360	Investment:	24.06%
W.A. Seasoning (Months):	4	Second Home:	5.58%
Latest Maturity Date:	February 1, 2037	Documentation Status:
State Concentration (Top 5):		Full:	11.86%
California:	31.02%	Stated:	50.36%
Florida:	10.79%	Limited:	0.88%
Nevada:	6.59%	No Documentation:	36.91%
Arizona:	6.46%	W.A. Prepayment Term (Months):	27
Texas:	5.27%	Loans with Prepayment Penalties:	22.68%
W.A. Original Combined LTV:	96.90%	Interest Only Loans:	1.91%
Range:	40.00% - 100.00%	W.A. Interest Only Term (Months):	71
First Liens:	0.00%
Second Liens:	100.00%
Non-Balloon Loans:	16.63%
W.A. FICO:	705
Index Type:
Fixed Rate:	100.00%

* Based on the 2007 ‘Second Mortgages’ loan limits only

** Unless otherwise stated, all percentages are based on Aggregate Principal Balance as of the Cutoff Date


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Originator
Originator	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
American Home Mortgage		970		66,564,215		21.51		12.386		707		96.37
GMAC		1,338		64,164,060		20.74		11.585		719		95.25
Chapel		596		48,939,624		15.82		11.164		696		97.79
Mortgage IT		266		20,363,450		6.58		10.753		707		95.96
Other		1,800		109,365,119		35.35		11.912		699		97.98
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Product Type
Product Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Fixed - 10 Year		1		51,951		0.02		9.990		695		100.00
Fixed - 15 Year		98		3,294,064		1.06		11.998		708		93.78
Fixed - 20 Year		20		831,454		0.27		12.497		695		97.65
Fixed - 25 Year IO		27		1,499,996		0.48		11.960		728		97.98
Fixed - 30 Year		740		41,561,866		13.43		12.367		695		98.72
Fixed - 30 Year IO		53		4,199,455		1.36		12.060		719		97.28
Balloon - 15/30		4,024		257,343,006		83.18		11.640		707		96.64
Balloon - 15/30 IO		3		204,700		0.07		14.186		670		89.46
Balloon - 30/40		4		409,973		0.13		11.201		658		100.00
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Principal Balance at Origination
Principal Balance at Origination ($)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0.01 - 50,000.00		2,436		76,176,547		24.62		12.178		710		96.62
50,000.01 - 100,000.00		1,840		131,400,929		42.47		11.694		702		97.49
100,000.01 - 150,000.00		497		60,093,699		19.42		11.459		703		98.14
150,000.01 - 200,000.00		130		22,795,880		7.37		12.046		701		95.71
200,000.01 - 250,000.00		31		7,072,300		2.29		11.037		717		96.10
250,000.01 - 300,000.00		16		4,390,330		1.42		10.935		719		95.10
300,000.01 - 350,000.00		9		3,020,912		0.98		10.921		733		85.81
350,000.01 - 400,000.00		8		3,095,114		1.00		11.693		705		83.99
400,000.01 - 450,000.00		2		852,247		0.28		10.468		745		92.54
450,000.01 - 500,000.00		1		498,510		0.16		8.650		798		74.07
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Remaining Principal Balance
Remaining Principal Balance ($)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0.01 - 50,000.00		2,442		76,391,725		24.69		12.177		710		96.61
50,000.01 - 100,000.00		1,837		131,431,131		42.48		11.692		702		97.49
100,000.01 - 150,000.00		495		59,907,006		19.36		11.460		703		98.14
150,000.01 - 200,000.00		129		22,737,192		7.35		12.046		701		95.72
200,000.01 - 250,000.00		31		7,072,300		2.29		11.037		717		96.10
250,000.01 - 300,000.00		16		4,390,330		1.42		10.935		719		95.10
300,000.01 - 350,000.00		9		3,020,912		0.98		10.921		733		85.81
350,000.01 - 400,000.00		8		3,095,114		1.00		11.693		705		83.99
400,000.01 - 450,000.00		2		852,247		0.28		10.468		745		92.54
450,000.01 - 500,000.00		1		498,510		0.16		8.650		798		74.07
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Remaining Term
Months Remaining	Number of Initial Mortgage Loans	Aggregate Remaining Principal Balance ($)	% of Aggregate Remaining Principal Balance	W.A. Coupon (%)	W.A. Non-Zero FICO	W.A. Original CLTV (%)
61 - 120	1	51,951	0.02	9.990	695	100.00
121 - 180	4,125	260,841,770	84.31	11.646	707	96.59
181 - 240	20	831,454	0.27	12.497	695	97.65
241 - 300	27	1,499,996	0.48	11.960	728	97.98
301 - 360	797	46,171,295	14.92	12.329	697	98.60
Total:	4,970	309,396,467	100.00	11.752	705	96.90

Interest Only Term
IO Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		4,887		303,492,315		98.09		11.745		705		96.90
60		73		4,821,143		1.56		11.988		719		97.04
120		10		1,083,009		0.35		12.646		722		97.83
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Mortgage Rate
Mortgage Rate (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
6.500 - 6.999		1		31,578		0.01		6.875		705		89.99
7.000 - 7.499		15		1,053,087		0.34		7.269		730		88.13
7.500 - 7.999		25		1,638,002		0.53		7.787		740		96.10
8.000 - 8.499		44		2,671,514		0.86		8.213		744		96.19
8.500 - 8.999		89		7,392,921		2.39		8.713		737		93.84
9.000 - 9.499		153		12,781,841		4.13		9.195		726		95.79
9.500 - 9.999		491		29,380,697		9.50		9.757		724		95.07
10.000 - 10.499		344		22,579,291		7.30		10.159		710		96.24
10.500 - 10.999		520		39,214,055		12.67		10.782		700		97.55
11.000 - 11.499		380		26,678,282		8.62		11.173		698		97.57
11.500 - 11.999		409		27,251,488		8.81		11.714		701		96.71
12.000 - 12.499		456		27,295,010		8.82		12.179		703		96.96
12.500 - 12.999		655		39,295,189		12.70		12.674		703		97.30
13.000 - 13.499		406		21,657,699		7.00		13.139		706		97.54
13.500 - 13.999		294		14,520,258		4.69		13.673		698		97.29
14.000 - 14.499		220		10,533,661		3.40		14.184		691		98.37
14.500 - 14.999		197		11,714,540		3.79		14.651		690		98.04
15.000 - 15.499		94		4,876,135		1.58		15.159		684		97.18
15.500 - 15.999		65		3,301,623		1.07		15.703		679		97.69
16.000 - 16.499		30		1,719,724		0.56		16.191		689		97.97
16.500 - 16.999		18		993,635		0.32		16.595		705		99.56
17.000 - 17.499		20		719,664		0.23		17.119		699		98.97
17.500 - 17.999		25		995,634		0.32		17.732		668		100.00
18.000 - 18.499		8		463,467		0.15		18.266		687		99.16
18.500 - 18.999		7		443,998		0.14		18.645		661		98.99
19.000 - 19.499		1		51,396		0.02		19.000		688		100.00
19.500 - 19.999		1		56,686		0.02		19.625		716		100.00
20.000 - 20.499		1		23,997		0.01		20.000		672		95.00
20.500 - 20.999		1		61,393		0.02		20.625		684		100.00
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Original Combined Loan-to-Value Ratio
Original Combined Loan-to-Value Ratio (%)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Less than or equal to 50.00		3		306,339		0.10		10.289		710		45.75
55.01 - 60.00		2		194,082		0.06		9.420		745		59.73
60.01 - 65.00		3		170,280		0.06		10.109		693		63.02
65.01 - 70.00		8		830,774		0.27		10.194		693		67.97
70.01 - 75.00		18		3,080,536		1.00		10.447		703		73.62
75.01 - 80.00		68		5,532,231		1.79		10.068		711		79.54
80.01 - 85.00		57		3,923,039		1.27		10.943		699		83.81
85.01 - 90.00		631		32,183,586		10.40		11.371		707		89.66
90.01 - 95.00		1,090		55,602,659		17.97		12.150		713		94.82
95.01 - 100.00		3,090		207,572,939		67.09		11.795		703		99.89
Total:		4,970		309,396,467		100.00		11.752		705		96.90

FICO Score at Origination
FICO Score at Origination	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
575 - 599		12		741,310		0.24		11.505		588		99.90
600 - 624		81		5,395,500		1.74		12.749		617		98.44
625 - 649		377		24,921,570		8.05		13.083		637		98.12
650 - 674		692		46,688,067		15.09		12.145		664		96.82
675 - 699		1,134		72,280,727		23.36		11.776		687		96.24
700 - 724		960		58,021,498		18.75		11.386		711		97.02
725 - 749		796		46,147,990		14.92		11.401		736		97.19
750 - 774		550		33,041,945		10.68		11.400		761		96.86
775 - 799		303		18,172,288		5.87		11.247		786		96.63
800 - 824		65		3,985,572		1.29		11.681		805		96.25
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Geographic Distribution*
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
California		1,038		95,966,837		31.02		11.065		702		96.84
Florida		549		33,398,237		10.79		12.503		703		96.16
Nevada		303		20,389,721		6.59		11.869		705		97.86
Arizona		323		19,975,918		6.46		11.861		704		97.15
Texas		462		16,318,817		5.27		11.373		716		97.35
Virginia		160		11,515,270		3.72		11.863		705		96.94
Illinois		188		10,300,832		3.33		11.942		704		97.94
Maryland		142		10,186,453		3.29		11.737		696		98.40
New York		122		9,381,419		3.03		12.005		703		96.25
Washington		124		7,969,937		2.58		11.806		709		96.62
Minnesota		146		7,392,747		2.39		12.439		711		98.10
Colorado		123		6,269,209		2.03		12.573		710		97.95
Utah		104		5,460,334		1.76		11.862		718		96.48
North Carolina		134		5,260,462		1.70		12.015		705		95.75
New Jersey		66		4,782,801		1.55		11.948		700		96.17
Oregon		81		4,774,569		1.54		12.108		706		97.50
Georgia		127		4,745,058		1.53		12.856		706		97.59
Massachusetts		58		4,043,431		1.31		11.985		729		96.05
Connecticut		48		3,439,616		1.11		12.406		708		95.84
Michigan		83		2,973,429		0.96		12.438		693		97.47
Idaho		39		2,199,972		0.71		11.384		725		93.75
Ohio		61		2,177,584		0.70		12.271		700		98.60
South Carolina		48		2,148,290		0.69		12.192		716		97.00
District of Columbia		21		1,886,093		0.61		11.105		709		89.62
Pennsylvania		52		1,672,916		0.54		12.375		707		95.40
Missouri		52		1,646,035		0.53		12.096		712		94.98
Hawaii		10		1,503,944		0.49		10.354		726		93.60
New Mexico		33		1,358,567		0.44		12.750		711		96.63
New Hampshire		17		1,110,054		0.36		12.454		712		98.94
Wisconsin		28		1,067,668		0.35		12.888		707		97.54
Louisiana		26		875,474		0.28		13.525		692		97.37
Indiana		29		789,388		0.26		12.557		708		96.73
Tennessee		25		750,015		0.24		12.489		713		96.85
West Virginia		10		643,312		0.21		14.206		664		99.11
Kentucky		13		630,959		0.20		12.113		690		97.88
Rhode Island		10		570,766		0.18		12.535		690		96.94
Arkansas		13		567,914		0.18		11.873		728		97.16

*Geographic Distribution continued on the next page


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Geographic Distribution (continued)
Location	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Oklahoma		21		473,647		0.15		12.586		713		97.04
Alaska		7		433,810		0.14		13.482		751		98.22
Maine		11		408,795		0.13		12.504		718		97.10
Delaware		9		316,143		0.10		13.012		694		97.62
Iowa		10		296,269		0.10		11.487		726		94.77
Alabama		11		275,307		0.09		12.292		689		92.70
Kansas		11		242,804		0.08		11.838		726		97.34
Montana		4		230,099		0.07		12.518		693		100.00
Vermont		3		175,073		0.06		13.561		713		99.29
Wyoming		5		111,106		0.04		13.773		709		92.18
Nebraska		3		101,081		0.03		12.712		730		95.00
North Dakota		3		93,567		0.03		11.673		746		97.24
South Dakota		2		67,928		0.02		16.276		683		100.00
Mississippi		2		26,795		0.01		14.202		724		87.00
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Occupancy Status
Occupancy Status	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Primary		2,825		217,699,704		70.36		11.251		699		97.28
Investment		1,852		74,436,027		24.06		13.083		722		96.07
Second Home		293		17,260,737		5.58		12.322		718		95.69
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Documentation Type
Documentation Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Stated Documentation		1,683		114,315,605		36.95		11.535		699		96.87
No Ratio		1,296		84,009,411		27.15		11.750		712		97.31
Full Documentation		677		33,032,401		10.68		11.039		709		98.19
No Documentation		546		29,892,096		9.66		12.114		723		93.76
Stated Income/Full Asset		315		21,130,628		6.83		13.124		685		96.47
No Income Verifier		307		18,027,732		5.83		12.200		707		98.37
Full Income/Full Asset		64		3,532,032		1.14		11.428		689		97.04
Limited Documentation		42		2,710,117		0.88		11.115		660		99.53
Stated Income/Stated Asset		34		2,325,256		0.75		12.943		711		95.44
No Income/No Asset		4		294,619		0.10		12.854		720		93.82
Full Income/Stated Asset		2		126,570		0.04		13.567		663		100.00
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Loan Purpose
Loan Purpose	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Purchase		4,371		258,725,834		83.62		11.832		708		97.93
Refinance - Cashout		458		40,523,321		13.10		11.360		693		91.52
Refinance - Rate Term		141		10,147,312		3.28		11.274		695		92.20
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

DESCRIPTION OF THE GROUP II COLLATERAL

Property Type
Property Type	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
Single Family Residence		2,700		170,237,287		55.02		11.537		703		97.08
PUD		1,277		81,343,721		26.29		11.706		705		96.71
Condo		473		28,542,353		9.23		12.124		710		96.58
2-4 Family		493		28,356,456		9.17		12.800		714		96.64
Townhouse		27		916,651		0.30		11.631		711		98.31
Total:		4,970		309,396,467		100.00		11.752		705		96.90

Original Prepayment Penalty Term
Prepayment Penalty Term (months)	Number of Initial Mortgage Loans		Aggregate Remaining Principal Balance ($)		% of Aggregate Remaining Principal Balance		W.A. Coupon (%)		W.A. Non-Zero FICO		W.A. Original CLTV (%)
0		3,966		239,211,768		77.32		11.826		709		96.62
6		28		1,914,362		0.62		12.926		719		96.84
12		107		7,846,844		2.54		11.676		693		96.38
24		421		31,148,553		10.07		11.119		687		98.96
36		445		29,145,260		9.42		11.762		699		97.17
60		3		129,680		0.04		10.442		744		96.74
Total:		4,970		309,396,467		100.00		11.752		705		96.90


ACE Securities Corp. Home Equity Loan Trust, Series 2007-SL1

FOR ADDITIONAL INFORMATION PLEASE CALL:

Deutsche Bank Securities

Whole Loan Trading
Michael Commaroto	212-250-3114
Paul Mangione	212-250-5786
Antonio Rhee	212-250-8569

ABS Banking
Sue Valenti	212-250-3455
Roxana McKinney	212-250-0848

ABS Structuring
Bill Yeung	212-250-6893
Chris Sudol	212-250-0507

ABS Collateral
Reta Chandra	212-250-2729
Kevin Fisher	212-250-7325

Standard & Poor’s Rating Service

Mark Goldenberg	212-438-1641
Peter G. Graham	212-438-1599

Moody’s Investors Service, Inc.

Karen Ramallo	212-553-0370
Rachel Peng	212-553-3831