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    interesting vid on facebook. IKE Engineering


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    Re: interesting vid on facebook. IKE Engineering

    85 cfm would of been a standard port, an average nothing special big valve head (most are wrong shape) will flow 105cfm, 120 cfm is a good flowing big valve, a really good one will flow 125ish cfm all these numbers @10" depression.
    Last edited by Graham; 22-11-2020 at 14:14.

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    Re: interesting vid on facebook. IKE Engineering

    That's interesting, not that I really understand it. But The super flow gauge showed 117cfm but on his laptop it showed
    122cfm. So which is it? And also does it matter what cam is in it, as to valve lift affecting flow?
    Last edited by rallyrob; 13-02-2021 at 17:14.

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    Re: interesting vid on facebook. IKE Engineering

    Also really liked the video under that one re: The accuspark Xflow competition dizzy, being tested by Bestek.
    Last edited by rallyrob; 13-02-2021 at 17:12.

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    Re: interesting vid on facebook. IKE Engineering

    Quote Originally Posted by rallyrob View Post
    That's interesting, not that I really understand it. But The super flow gauge showed 117cfm but on his laptop it showed
    122cfm. So which is it? And also does it matter what cam is in it, as to valve lift affecting flow?
    his laptop was probably had a correction factor for temperature and humidity.

    regarding the cam yes and no, you should consider the cam, no point having a head with really good flow at a valve lift way beyond where the cam goes, especially if the flow suffers at lower lifts. you also need t bear in mind a valve is only at full lift for a moment. but its at mid lift twice

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    Re: interesting vid on facebook. IKE Engineering

    Quote Originally Posted by Graham View Post
    you also need t bear in mind a valve is only at full lift for a moment. but its at mid lift twice
    If you look at the cam of a camshaft (especially a std-ish cam) the duration of a valve at or near max lift is actually quite long. Whereas it will fly past mid lift (half lift) quite fast.

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    Re: interesting vid on facebook. IKE Engineering

    Good point miniliteman mid lift is good but valve lift from 300 to 500 inch lift is more important I've try different heads and my motor made more power with more upper lift flow cheers mario.

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    Re: interesting vid on facebook. IKE Engineering

    Something to consider

    Multiply the lift by the flow at that lift and graph the result plotted against the cam duration on the x axis. The one with the biggest area under the resulting curve should theoretically have the most flow overall and power. There are probably other considerations such as the momentum of the air flow, swirl etc.
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