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Thread: Converting an existing Accel/BDS EFI system to self learning EFI?

  1. #1
    FSTORNG Guest

    Default Converting an existing Accel/BDS EFI system to self learning EFI?

    Hi, I have a 427 ci Big Block Chevy with an 8:71 supercharger and an Accel / Blower Drive Service EFI 16 injector system (Calmap v. 6.32, it uses DOS, it's that old...) in my 1968 Camaro. I am interested in finding out what I would need to do to convert this system to a new, self tuning unit. 99 percent of the use on this car is street use, and the weather here in Utah changes very rapidly, all the time, so having the ability for me to not have to try and tune it every time I drive it would be helpful.

    Thanks, Mike

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,906

    Default

    You should be able to reuse most of what you already have.
    In which case, the HP EFI ECU & Harness Kits are probably a good starting point:
    https://www.holley.com/products/fuel..._harness_kits/

    View this HP & Dominator EFI Selection Guide for compatible components:
    https://www.holley.com/document/efi_...chart62914.pdf

    View this Holley EFI catalog to determine if you want the HP or Dominator ECU:
    https://www.holley.com/document/cata...ley_efi_20.pdf
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #3
    FSTORNG Guest

    Default

    Thanks for the info. Is it possible to buy the ECU only and get a wiring schematic, or do I have to buy a universal harness kit? If so, how much does that really save on cost?

    Mike

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,906

    Default

    Yes, you can purchase either ECU separately, but why?
    http://www.holley.com/division/HolleyEFI.asp#96 (Holley EFI Components)
    Your Accel DFI harness won't connect to the Holley ECU and it doesn't have as many wires.
    https://www.holley.com/document/tech...10555rev16.pdf (Holley EFI Wiring Manual)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  5. #5
    FSTORNG Guest

    Default

    I do realize that it wouldn't connect right up. I do have some wiring abilities, just thought it "might" be easier to update the connections on my wiring harness already installed in the car. So, if I got this correctly, the Holley system uses more wiring? (Seems logical.)

    This is exactly why I needed some help on this. I appreciate your quick replies to my questions. Thanks, Mike.

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