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Exhuast valve opening function

Discussion in 'Technical Q&A' started by dersark_painclinic, Mar 12, 2006.

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  1. dersark_painclinic

    dersark_painclinic Formula Junior

    Mar 8, 2005
    981
    Glendale, CA
    Full Name:
    Lazik Der Sarkissian
    #1 dersark_painclinic, Mar 12, 2006
    Hello ferarri lovers.

    On my 550 the two inner exhaust pipes have valves which suppose to open and close in certain conditions. I tried to observe the opening of those valves by raising the RPM to 6000 and watch them, but they don't open, any body knowes there function, when they operates.

    Thanks
    L. Der Sarkissian
     
  2. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
    Full Name:
    Phil Hughes
    #2 ferrarifixer, Mar 12, 2006
    If you have somebody blip the throttle sharply to about 5500rpm from idle, while you observe up the pipes (put glasses on!!), you'll see them open and close(assuming they're working ok).

    There is no reason to have them open permanently like some people do... other than to simply make a bit more noise.

    In fact, it can be argued that opening them permanently reduces performance a little, as low down back pressure is reduced.

    You can also observe the variable intake system operating on the plenum cmaber rear end using the same method... or they can be operated through the SD1.
     
  3. can'tdrive55

    can'tdrive55 Rookie

    Mar 10, 2006
    7
    #3 can'tdrive55, Mar 12, 2006
    The valves will open under a load (while your driving). They will not open when reving it at a stand still.
     
  4. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
    Full Name:
    Phil Hughes
    #4 ferrarifixer, Mar 13, 2006
    Yes, they will.
     

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