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Thread: rpm's vs mph?

  1. #1

    rpm's vs mph?

    i ran my rxpx today with my 4'' intake, r&d grate, prop, and 83mm nozzle. it turned 8040-8060 in 50* weather and water.
    i am thinking i need to be almost on the limiter "8160-8180" in this weather to be at 8100 in summer.
    my question is what mph can i expect to gain from the extra 100 rpm's?


  2. #2
    Focker Foggy's Avatar
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    About 1 mph difference per 100 rpms

  3. #3
    also i was thinking. will the ski "loosen" up as it breaks in and gain rpm's?

  4. #4
    Laxcrazy23's Avatar
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    how many hours on your ski? My 08 woke up around 12 hours.

  5. #5
    pass1's Avatar
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    like the others said, it should wake up at the 10-12 hours mark, my gtx 215 was turning 7600-7700 until then and at the 10h went to 8100. Computer is programmed to do that.

  6. #6
    Quote Originally Posted by pass1 View Post
    like the others said, it should wake up at the 10-12 hours mark, my gtx 215 was turning 7600-7700 until then and at the 10h went to 8100. Computer is programmed to do that.
    lol are you serious? mine has 1 hour

  7. #7
    Quote Originally Posted by Laxcrazy23 View Post
    how many hours on your ski? My 08 woke up around 12 hours.
    laxcrazy23... is your prop out of the box or did you have to pitch it? we have the same mods?

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