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  1. #1
    mstennes's Avatar
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    RXP impeller question, do I need more?

    My modded RXP, is running a 15/22 right now, it seems to me it's turning to fast as in I can't keep the pump loaded. My set up is a 2Rude, 4" Kana, Riva ECU, and one of Jerry's water boxes. What's happening is, I'm instantly up against the rev limiter, and it's no faster than my modded RXPX. With all the mods it should easily bust 78mph which is what my RXPX does, I also have another RXP that is modded pretty close to the one in question except it has a X super charger, and it will pull 77 mph, both are running Pirahana ICs in case that makes a difference? To me the 2Rude boat should pull at least 80?


  2. #2
    mstennes's Avatar
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    No one?

  3. #3
    Your on the rev limiter the entire time ? or just out of the hole ?

  4. #4
    boost junkie skidoochris's Avatar
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    sounds like your bellows weak, how old is it?
    15/22 is a big prop if your hooked up ( I can only get 8000+ with mine)

  5. #5
    What are the symptoms of a weak bellow?

  6. #6
    Mothman's Avatar
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    Throw in a new wear ring and check your alignment.

  7. #7
    mstennes's Avatar
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    Quote Originally Posted by big_baller View Post
    Your on the rev limiter the entire time ? or just out of the hole ?
    Yes, I'm hard on it, its a Riva ECU at that.

  8. #8
    mstennes's Avatar
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    Quote Originally Posted by Mothman View Post
    Throw in a new wear ring and check your alignment.
    Stainless, looks perfect, alignment is perfect

  9. #9

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    Not all 15/22's are the same. I just tried 1 this past weekend and I turned mine 250 rpm more than my 15/20 that I had in the ski. Try taking the jet pump assemblly off the ski that turns less rpm, but makes a higher top speed and install it into your ski that has the small 15/22 in it. Report the results

  10. #10
    83.0 @ 8400 jhill19's Avatar
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    RXP impeller question, do I need more?

    A pitched 15/20 if your running more than stock revs will be better than a 15/22

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