Testarossa T/Body Flap adjustment | FerrariChat
Buy

Testarossa T/Body Flap adjustment

Discussion in 'Technical Q&A' started by flav, Jan 13, 2007.

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

  1. flav

    flav Rookie

    Jun 1, 2006
    7
    #1 flav, Jan 13, 2007
    After a week servicing and doing fine tuning on this car i have 1 thing left... I have found that the throttlebody flap for the left bank needs a very fine adjustment. I can see that when it is running, warm or cold with the filter box removed, that the right flap is fractionally more open than the left one. If i gently press it down, about .2mm it runs much smoother, if i do the same to the right one it runs rough. I have played with the balance and air valve a little but i put them back where they were. How do you adjust the flap when its running?

    Cheers nice people!
    Thanks for all the help so far.

    p.s. Did anyone see the testa, the 550, the 360, the 348ts and the orange muricelago on Lygon st today? That was us!! Come say hello anytime and say your from here!
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,931
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Jan 13, 2007
    Last edited by a moderator: Sep 7, 2017
    Flav -- Your observation that the deflections of the airflow sensor plates are noticeably unequal is a sign that things are not well, but their positions during idle are a result of other adjustments/conditions (i.e., you don't adjust them directly). What's important is that the (absolute) air pressure (measured with a vacuum gauge or manometer) inside the intake plenums at warm idle is quasi-equal on both banks -- if they are (significantly) not equal, then some tweaking (of the throttle plate linkages and/or stops and/or air bypass screws) is necessary (and, just like a multi-carb system, if you tweak something that changes the airflow, you'll need to tweak/confirm the mixture adjustments also so it probably won't be a single tweak fix if it needs help).

    ...so please first measure/compare the vacuum in each intake plenum at warm idle (and if you use a Bourdon Tube-style vacuum gauge just use one gauge and do it one bank after the other as quickly as possible -- I've found that the difference/error between these type of vacuum gauges can be significant).

    What Engine Family is this TR? It will be something like F113A, F113B, F113A040, etc. -- it's shown on the top surface of the engine block at cyl #6 along with the engine SN.
    Image Unavailable, Please Login
     

Share This Page