0 degree being closed 90 degree being horizontal or wide open

Discussion in 'Engine, Fuel and Exhaust' started by shovelrocker, Jan 29, 2010.

  1. shovelrocker

    shovelrocker Member

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    Anybody ever wonder why the butterfly on your Fuel injection only opens to 60 to 70 degrees? Wide open is 90 degrees or compleatly horizontal on a carb why not a FI system? Can someone tell me what would hapen if I were to modify mine to open to 90 degrees?
     
  2. Hoople

    Hoople Account Removed

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    I would think the engine would run a lot better. I never have seen a throttle body butterfly Not be at 90 degrees when the throttle was "floored". At least on Cages they do. :p