Need advise on correct setting of air adjusting throttle | FerrariChat
Buy

Need advise on correct setting of air adjusting throttle

Discussion in 'Technical Q&A' started by Brewman, Sep 18, 2014.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Brewman

    Brewman Formula Junior

    Apr 3, 2012
    417
    NC Mountains @ Boone
    Full Name:
    Joe
    #1 Brewman, Sep 18, 2014
    Last edited by a moderator: Sep 7, 2017
    I am unsure how to correctly set item 45 on the attached drawing. The WSM indicates the throttle begins to open at 3500 RPM. I take this to mean under this the valve is closed. However when reinstalling the plenum the throttle disc has 12 degrees stamped on it. This makes me question if this means set to 12 degrees rather than full closed below 3500 RPM.

    Thanks in advance.

    Brewman
    Image Unavailable, Please Login
     
  2. 335s

    335s Formula Junior

    Jan 17, 2007
    870
    SF Bay Area
    Full Name:
    T. Monma
    #2 335s, Sep 19, 2014
    most probably it is the angle of the cut of the plate when looking at it from the side view...think of a carb throttle plate and the chamfered edge which it has to seal better within the carbs bore
     
  3. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    #3 ernie, Sep 21, 2014
    ^This.

    And.

    That is the plate for the intake compensation valve. You do not need to adjust it. At low rpm it remains closed, and as you read, at 3500-5500 rpm it opens up to help balance the two plenums in the mid range. It's either open or closed, no adjustment needed. That is unless you fooled with the arm between the diaphragm and the valve.

    Did you mess with the length of that connecting arm?
     

Share This Page