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Thread: RPM vs MPH

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    EH Team Water Pig's Avatar
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    RPM vs MPH

    I have read mention of the correlation between RPM & MPH and was trying to find a thread but couldn't.
    Specifically, on an RXP-X if I go to up 100 rpm from the stock rev limiter setting what generally is the mph increase?


  2. #2
    Big K's son KeithKman's Avatar
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    Generally, 100 rpm is about 1 mph give or take.

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    EH Team Water Pig's Avatar
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    RPM vs MPH

    I thought it was something like that. Thanks.

  4. #4
    speedskixp's Avatar
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    Ussualy if I gain 100 rpms on top because of increased power for whatever reason I will gain more than 1mph with my prop/nozzle set-up. If you gain 100rpms by de-pitching or nozzle change you will probably gain a little less. If you bump your rev limit up 100 rpms you will probably need to de-pitch to turn that rpm.

    BTW I just noticed that my ski is almost exactly 100 rpms per mph over-all. 81.4mph @8150rpm

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