tbi in non tbi vehicles

Discussion in 'High Tech Retrofits' started by shawn81z, Feb 25, 2006.

  1. 1978LT

    1978LT Veteran Member

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    I wouldn't fool with TBI. Go TPI!! Lotsa extra low end and midrange power ;):) A TBI is basically a carb that atomizes the fuel more. With a TPI you would be changing the whole manifold and have an injector for each cylinder.
     
  2. verhoeve

    verhoeve Veteran Member

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    I've got 2 GM TBI's mounted on an Edelbrock Street Tunnel Ram on my 396. I'm counting on Lance from F.A.S.T. for some tuning advice once I get it fired along with my local dyno operator. With a 6 speed and 4:56 gears I hope it works well.
     
  3. Mizzouri

    Mizzouri Member

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    Does TBI have an RPM limit like the stock TPI units did? I've been toying with either putting an FI unit on my current 350 or getting an LT1. Need some advice for sure.
     
  4. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

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    Just think 4bbl. Same premise. YOur RPM range is determined by your components.

    verhoeve, that sounds cool. Top end & it might idle half decent! Cool.
     
  5. verhoeve

    verhoeve Veteran Member

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    Last edited: Mar 3, 2006
  6. Kamikaze

    Kamikaze Veteran Member Lifetime Gold Member

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    I second what Verhove said.

    Talk to Tom Miller at Turbo City!

    They've been doing TBI conversions to carbed engines and have used adapter plates to mount the TBI to standard quad or Holley intakes.

    They have harnesses, stand-alone computers, etc to make the swap.

    For a daily driver that's mild or stock performance, it's hard to beat the driveability of the TBI!
     
  7. GetMore

    GetMore Veteran Member Lifetime Gold Member

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    Barry Grant had a really nice TBI unit-it was a Holley with injectors in place of the metering blocks. Carbs do a much better job of atomizing fuel than the injectors in a TBI.

    EvolGrinZ, I've got a Passat TDI. Of course it only gets 56 mpg. I'll bet the Seat does considerably better.
     
  8. verhoeve

    verhoeve Veteran Member

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    Carbs do a much better job of atomizing fuel than the injectors in a TBI.

    Huh? If that were true they wouldn't have went to TBI for better fuel economy. It certainly cost more than a carburetor so it wasn't a cost factor.
    Please explain.
     
  9. GetMore

    GetMore Veteran Member Lifetime Gold Member

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    Better mixture quality.
    The venturi in a carb will do a much better job or atomizing fuel than a large injector with low fuel pressures.
    Multipoint fuel injection, on the other hand, does do a good job of atomization. I'm not sure it does better than the venturi, but by injecting fuel on the intake valve it does make the fuel evaporate.
     

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