General question about Lift and Duration ! | FerrariChat
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General question about Lift and Duration !

Discussion in 'Technical Q&A' started by FLATOUTRACING, Oct 10, 2004.

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  1. FLATOUTRACING

    FLATOUTRACING F1 Rookie

    Aug 20, 2001
    2,684
    East Coast
    Full Name:
    Jon K.
    #1 FLATOUTRACING, Oct 10, 2004
    How do you measure or determine what the lift and duration are on a cam.

    I am trying to determine if a cam in my race car is indeed stock or aftermarket.

    What tools or machine would be needed to determine this with 100% accuracy.

    Regards,

    Jon P. Kofod
    www.flatoutracing.net
     
  2. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
    Full Name:
    Phil Hughes
    #2 ferrarifixer, Oct 10, 2004
    You fix a degree wheel to one end of the crankshaft, and a dial indicator to a valve lifter. Then simply turn the engine and note the period the valve is open for, and how far it opens.
     
  3. Matt Morgan, "Kermit"

    Matt Morgan, "Kermit" Formula Junior

    Nov 12, 2003
    405
    Ferndale, WA
    #3 Matt Morgan, "Kermit", Oct 10, 2004
    Jon,
    You ought to check out this site:
    http://www.webcamshafts.com
    Scroll to the bottom, and there are links to pages that explain terminology, how to dial in cams etc. Very well done, and good of them to have taken the time to put the material up for all. Cam events can dramatically effect how a Ferrari motor performs, and there is more than a bit of misunderstanding on the hows and whys.
    BTW: They do by the way excellent work, and I use their cams. Service has been excellent, on time!
    HTH,
    Kermit
     
  4. pma1010

    pma1010 F1 Rookie

    Jul 21, 2002
    2,559
    Chicago
    Full Name:
    Philip
    #4 pma1010, Oct 10, 2004
    You need the cam specs to determine lift and ramps at checking lash versus operating lash [clearances].
    Philip
     

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