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Thread: Intake plenum/throttle body position question

  1. #1
    Registered User Ferrarist's Avatar
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    Intake plenum/throttle body position question

    Which setup is better and provides maximum end power - when throttle body position is 90 degree against intake runners or directly against it?
    Pros and cons for both?
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  2. #2
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    I.....have no idea, but, I reckon it is less about angle of throttle to inlet runners, more about volume of plenum. In the real world there is of course, Packaging! Packaging is everything, all very good saying 2 1/4" runners 10" long but if you can't fit them it means shit.

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    " I didn't have $$$$$, so I thought I'd build a car instead" : Ron Tauranac

  3. #3
    Registered User Ferrarist's Avatar
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    Volume is same as original manifold, but originally TB is 90 degree against runners.......packaging is not a problem for me, i can do it both ways......

  4. #4
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    Copy what 80ís F1, group B/C, 90ís JGtC, and time attack do.
    Quote Originally Posted by Bosshoggett View Post
    If your planing to drive this on the road and enjoy it, id suggest a second opinion, someone with a history in Australian Rally or Fink River . If your just playing dyno comps. Then ok

  5. #5
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    somewhere in between
    E30 325is M20 3.1L

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