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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934



Date of Report (Date of earliest event reported) January 4, 2005


                              ACE SECURITIES CORP.
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             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)




           Delaware                                   333-119047                                     56-2088493
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 (STATE OR OTHER JURISDICTION                        (COMMISSION                                  (I.R.S. EMPLOYER
      OF INCORPORATION)                              FILE NUMBER)                                IDENTIFICATION NO.)

6525 Morrison Blvd.,
Suite 318
Charlotte, North
Carolina                                                                                                28211
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    (ADDRESS OF PRINCIPAL                                                                            (ZIP CODE)
      EXECUTIVE OFFICES)


Registrant's telephone number, including area code, is (704) 365-0569.

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17
CFR 240.14a-12(b))

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))

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                                       -2-


Item 8.01.        Other Events.
                  ------------

Description of the Mortgage Pool

                  On or about January 14, 2005, the Registrant will cause the
         issuance and sale of approximately $144,443,000 initial principal
         amount of ACE Securities Corp. Home Equity Loan Trust, Series 2005-SD1
         Asset Backed Pass-Through Certificates (the "Certificates") pursuant to
         a Pooling and Servicing Agreement to be dated as of January 1, 2005,
         between the Registrant as depositor, Wells Fargo Bank, National
         Association as master servicer and securities administrator, Ocwen
         Federal Bank FSB as a servicer, Option One Mortgage Corporation as a
         servicer and HSBC Bank USA, National Association as trustee.

Structural Term Sheets

                  Deutsche Bank Securities Inc. (the "Underwriter") has advised
         the Registrant that it has furnished to certain prospective purchasers
         of Certificates certain materials ("Structural Term Sheets") in written
         form, which are in the nature of data tables.

                  The Structural Term Sheets have been provided by the
         Underwriter. The information in the Structural Term Sheets is
         preliminary and may be superseded by the Prospectus Supplement relating
         to the Certificates and by any other information subsequently filed
         with the Securities and Exchange Commission.

                  The Structural Term Sheets were prepared by the Underwriter at
         the request of certain prospective investors, based on assumptions
         provided by, and satisfying the special requirements of, such
         prospective investors. The Structural Term Sheets may be based on
         assumptions that differ from the assumptions set forth in the
         Prospectus Supplement.







                                       -3-

Item 9.01.    Financial Statements, PRO FORMA Financial Information and Exhibits

              (a) Financial Statements.

                  Not applicable.

              (b) PRO FORMA Financial Information.

                  Not applicable.

              (c) Exhibits





                                      ITEM 601(A) OF
                                      REGULATION S-K
      EXHIBIT NO.                      EXHIBIT NO.                                    DESCRIPTION
      -----------                      -----------                                    -----------
                                                            
           1                               99.1                   Structural Term Sheets (as defined in Item
                                                                  8.01) that have been provided by the
                                                                  Underwriter to certain prospective
                                                                  purchasers of ACE Securities Corp. Home
                                                                  Equity Loan Trust, Series 2005-SD1. The
                                                                  Structural Term Sheets have been filed on paper
                                                                  pursuant to a continuing hardship exemption from
                                                                  certain electronic requirements.









                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

Dated: January 17, 2005

                                                     ACE SECURITIES CORP.


                                                     By: /s/ Patricia C. Harris
                                                         -----------------------
                                                     Name:   Patricia C. Harris
                                                     Title:  Vice President


                                                     By: /s/ Evelyn Echevarria
                                                        ------------------------
                                                     Name:   Evelyn Echevarria
                                                     Title:  Vice President









                                  EXHIBIT INDEX





                             Item 601(a) of                                             Sequentially
                             Regulation S-K                                             Numbered
Exhibit Number               Exhibit No.                    Description                 Page
- --------------               -----------                    -----------                 ----
                                                                               
1                            99.1                           Structural Term Sheets.     6
                                                            The Preliminary
                                                            Structural and Collateral
                                                            Term Sheet has been filed
                                                            on paper pursuant to a
                                                            continuing hardship
                                                            exemption from certain
                                                            electronic requirements.