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Question about revs

Discussion in 'Technical Q&A' started by Mantinger, Mar 31, 2009.

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  1. Mantinger

    Mantinger Karting

    Jul 30, 2004
    145
    Netherlands, Drenthe
    Full Name:
    H
    #1 Mantinger, Mar 31, 2009
    Last edited: Mar 31, 2009
    Some time ago somebody told me high revs in neutral or clutch engaged (showing the sound of the engine by trafficlight or on demand) can really damage the internal parts.
    Exists mechanical difference between high revs under heavy acceleration and high revs on standstill?
     
  2. ProCoach

    ProCoach F1 Veteran
    Owner

    Sep 15, 2004
    5,465
    VIR Raceway
    Full Name:
    Peter Krause
    #2 ProCoach, Mar 31, 2009
    High revs (within 20% of redline) unloaded (in neutral), especially large changes in revs in the upper range, can be detrimental to engines with high piston speeds. Without loading the engine components by "work," the random "floating" of the internal engine parts does not promote even wear, is prone to overspeeding and is a great strain to chains and belts.

    An accelerating (and decelerating) engine that is loaded (weight and inertia of the car) slows the rate of change, is less likely to overspeed (go beyond the indicated engine rpm) and makes uniform the thrust loads on the piston crowns, valve gear and bearing surfaces in the bottom end.
     
  3. Mantinger

    Mantinger Karting

    Jul 30, 2004
    145
    Netherlands, Drenthe
    Full Name:
    H
    #3 Mantinger, Mar 31, 2009
    Thanks ProCoach! So even loads are better and save the internal parts from overspeeding and sudden speedvariation.
    Appreciate!
     

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