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Thread: Vortec PCMs

  1. #16
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    Quote Originally Posted by EagleMark View Post
    We've got one here and use it for a baseline spark advance Vortec head swap.
    That's exactly why I'm interested! So what is the BCC?

  2. #17
    RIP EagleMark's Avatar
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    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  3. #18
    Fuel Injected! JeepsAndGuns's Avatar
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    Quote Originally Posted by belaw View Post
    Any idea what bcc's they used?
    Possiably BNKM? BCC find lists it as being used in 95 and 96.
    http://www.gearhead-efi.com/BCCFind/...shtml?BCC=bnkm
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

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  4. #19
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    Quote Originally Posted by EagleMark View Post
    We've got one here and use it for a baseline spark advance Vortec head swap.
    I loaded BRDW into TunerPro and (using $0D definitions) ran a comparison with BJYL, focusing on the spark tables. Even to my uneducated eyes the results were surprising; main spark tables were identical but the CTS spark advance table was very different.

  5. #20
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    Mark:

    I don't even know if there's a hack for the OBDII PCMs, but could you possible extract the MAF flow/frequency table data?

    I've found tables for just about every other MAF except for the one GM used with the L31! (And yes, I'm off on another tangent...)

    Brian

  6. #21
    RIP EagleMark's Avatar
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    I'll let you know when my EFI Live get's here...

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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