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  1. #1
    rxpdoo's Avatar
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    internal engine modification

    i have been told that 4 stroke power for top end speed is mostly dictated by the cylinder head (springs, retainers, bigger valves). lightening the buttom end only helps accelleration. it does not make it faster. what does everone else think?


  2. #2

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    they work just like car engines. Same idea, move more air = more power. using bigger cams, valves, and head work all move more air. Balanceing and lightening the bottom end will help in accelleration, and allowing the engine to rev smoother and safer being that its ballanced.

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    HOSS's Avatar
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    2 words for lightenning the bottom = reciprocating weight

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    rxpdoo's Avatar
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    internal engine modification

    so lightening will not make the engine go any faster(lightening rods, lightweight pistons,knife edge the crank) just rev quicker. sounds like a lot of people waste there money working on the buttom end.

  5. #5
    captain obvious Lurker's Avatar
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    It does make you rev more quickly but it also "unlocks" horsepower that is robbed by these heavy components

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    Site Admin Green Hulk's Avatar
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    Re: internal engine modification

    Quote Originally Posted by rxpdoo
    so lightening will not make the engine go any faster(lightening rods, lightweight pistons,knife edge the crank) just rev quicker. sounds like a lot of people waste there money working on the buttom end.
    The big power comes from the headwork, but doing the things you mentioned to the bottom end will help it rev faster which means better acceleration. To me, the acceleration is what i love

  7. #7
    HOSS's Avatar
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    free`s up hp,,,you`ll gain acceleration and have more rpm capability

  8. #8
    rxpdoo's Avatar
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    internal engine modification

    isn't there a point where too light might decrease top speed. pistons,rods and crank ? or is this different since the supercharger is involved.

  9. #9
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    Re: internal engine modification

    Quote Originally Posted by rxpdoo
    i have been told that 4 stroke power for top end speed is mostly dictated by the cylinder head (springs, retainers, bigger valves). lightening the buttom end only helps accelleration. it does not make it faster. what does everone else think?
    the secret to a motor is the TOP end.. port work/etc, but as to your comment on light weight valve train….

    If its lighter IT then can follow the cam profile, hence doing what the cam timing needs to do. More horsepower,for you,,

    Trust me.

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