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Thread: holley throttle body

  1. #1
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    holley throttle body

    hi i am new to all this efi stuff and may need some help here and there. i have a 1969 chevy truck that i would like to put efi in it wish me luck . i was wondering if anyone could tell me if you can use a gm obd1 ecu to run a holley projection 4di throttle body so you can have 4 barrels instead of just 2?

  2. #2
    Super Moderator dave w's Avatar
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    I'm thinking not really a good idea to use a factory computer to run the 4 barrel / 4 injector Holley Throttle Body. The factory computer has electronics that were designed for two injectors, not four injectors. I'm thinking with some good soldering skills and the correct electronic parts (MOSFET's), the factory computer could be modified to correctly operate / handle the current needed when using four Holley TBI injectors.

    dave w

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    RIP EagleMark's Avatar
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    Fuel Injected! gregs78cam's Avatar
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    ^+1, works very well.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

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    Quote Originally Posted by EagleMark View Post
    thanks for the link this will sure come in handy

  6. #6
    Super Moderator dave w's Avatar
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    I just noticed a change in business policy from Dynamic EFI, you don't need to purchase an EBL system to get the 4 injector upgrade.

    dave w

  7. #7
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    Quote Originally Posted by gregs78cam View Post
    ^+1, works very well.
    im new to this stuff and im not sure what this means

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    Quote Originally Posted by dave w View Post
    I just noticed a change in business policy from Dynamic EFI, you don't need to purchase an EBL system to get the 4 injector upgrade.

    dave w
    is there a better or cheaper way to go than their ebl system cause my engine has a larger cam in it and will need to be programed for that cam and probably wont work off of stock programing.

  9. #9
    Super Moderator dave w's Avatar
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    Quote Originally Posted by bonnieclyde100 View Post
    is there a better or cheaper way to go than their ebl system cause my engine has a larger cam in it and will need to be programed for that cam and probably wont work off of stock programing.
    The EBL system is a good system, mostly because it beginner friendly and the support from Dynamic EFI. Either system Factory or EBL will have a steep learning curve for the beginner tuner!

    dave w

  10. #10
    Fuel Injected! gregs78cam's Avatar
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    Quote Originally Posted by bonnieclyde100 View Post
    im new to this stuff and im not sure what this means
    It means I agree. I had it done to my '7427 to run the two factory TBIs.
    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  11. #11
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    Quote Originally Posted by gregs78cam View Post
    It means I agree. I had it done to my '7427 to run the two factory TBIs.
    do you have a picture of that i would like to see it because i may do that on my other truck

  12. #12
    Fuel Injected! gregs78cam's Avatar
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    1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
    1981 Camaro Z-28 Clone, T-Tops, 350/TH350
    1981 Camaro Berlinetta, V-6, 3spd
    1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s

  13. #13
    RIP EagleMark's Avatar
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    Looks cooler in person!

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

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