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power loss from tbi?

Discussion in 'The Garage' started by shaun89, Jan 10, 2007.

  1. shaun89

    shaun89 1/2 ton status

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    i plan on getting a crate engine with 415hp and 445ft lbs and it comes with everything but the carb, i found an adaptor plate to put on a holley tbi set up and i emailed hi-tech engines about it, he said there would be "extreme power loss" if i used the TBI...has anyone experienced this or is he just wanted me to put on the recommened 850cfm carb they test them with?...sorry about the long post
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    if you want tbi but still power look in to 4 barrel tbi unit or tuneport. stock just wont flow your needs even with mods for best results.
     
  3. beater_k20

    beater_k20 Banned

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    even a stock TPI will be a bit of a restriction compared to an 850 carb
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    A bit? Try about 300CFM lol. :)
     
  5. Thunder

    Thunder 3/4 ton status

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    What Holly TBI system are you looking at?
    If you use the right HolleyTBI system you should have no power loss at all and get way better driveabilty over the carb. Holly makes TBI systems that will easily support 415 HP or more. The 950 Comander TBI will support over 500 HP. You dont need any adapter plate. The TB will bolt to any square flange manifold.
    Maby the guy thought you were talking about stock GM TBI or the 670 CFM Holley which will not work with the engine you are getting.
     
  6. K5er4Life

    K5er4Life 1/2 ton status

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    Thunder is right, the stock TBI will in no way support that kind of horsepower. Even holleys 670 wont come close to supplying enough fuel for that motor. However a complete aftermarket system from holley or even eldebrock has a system I believe, will support that motor.
     
  7. shaun89

    shaun89 1/2 ton status

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    damn...thanks all the help guys, holley makes a 900 cfm tbi? would that connect right up to my stock plugs and all that fun stuff thats on there now?..again...u guys save me:bow:
     
  8. 1977k5

    1977k5 3/4 ton status Vendor

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    Nope, you'd pretty much have to buy the whole Holley setup.
     

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