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Thread: 7747 to 7427 Fueling

  1. #1
    Fuel Injected! TheApocalyptican's Avatar
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    7747 to 7427 Swap

    Any chance I can just transfer my tables over when switching, or is it just asking for trouble, and I should just start from scratch again?
    Last edited by TheApocalyptican; 06-22-2013 at 08:01 AM.
    '90 Suburban w/ pretty much stock 350 TBI, 7427 ECM Conversion, sadly sold several years ago
    '95 K2500 Suburban w/ soon to be 400HP 454

  2. #2
    RIP EagleMark's Avatar
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    They won't fit exactly because the tables are differant. But yes use them it's a good start. Have to think about Idle and Off Idle tables as well.

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

  3. #3
    Fuel Injected! TheApocalyptican's Avatar
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    That's what I was hoping. Thanks!
    '90 Suburban w/ pretty much stock 350 TBI, 7427 ECM Conversion, sadly sold several years ago
    '95 K2500 Suburban w/ soon to be 400HP 454

  4. #4
    Fuel Injected! TheApocalyptican's Avatar
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    Ok. Everything is working, except for my bad knock sensor. Anyone know exactly what needs changed in the bin in order to disable the knock stuff? Only wanna do it until I change out the sensor for the newer one.
    '90 Suburban w/ pretty much stock 350 TBI, 7427 ECM Conversion, sadly sold several years ago
    '95 K2500 Suburban w/ soon to be 400HP 454

  5. #5
    Super Moderator dave w's Avatar
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    Most of the '7427 conversions I've done, I started with a base '7427 .bin file (ie 5.7 liter, 7.4 liter).

    dave w

  6. #6
    Fuel Injected! babywag's Avatar
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    Quote Originally Posted by TheApocalyptican View Post
    Ok. Everything is working, except for my bad knock sensor. Anyone know exactly what needs changed in the bin in order to disable the knock stuff? Only wanna do it until I change out the sensor for the newer one.
    I don't run a knock sensor on my '90.
    I just unchecked the error code (43) and that worked for me.
    Tony

    '88 Jeep Grand Wagoneer (aka Babywag)
    '67 Jeep J3000
    '07 Dodge Magnum SRT8

  7. #7
    Fuel Injected! TheApocalyptican's Avatar
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    There's not some type of knock test like the 7747 had that needs to be set to "pass" so that timing isn't taken out? Also, if you don't run one, how do you go about tuning the spark tables?
    '90 Suburban w/ pretty much stock 350 TBI, 7427 ECM Conversion, sadly sold several years ago
    '95 K2500 Suburban w/ soon to be 400HP 454

  8. #8
    Super Moderator dave w's Avatar
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    I set Minimum Temperature for Knock Retard to maximum, to disable the "knock stuff".

    dave w

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