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  1. #1

    Do these RPMs sound right?

    So after seeing some of the recommendations on here, I installed a 15/20 Solas impeller in my 06 RXP (at same time went to 4" Fizzle intake from 3" Riva). Ski has Riva thru hull Exhaust, x-charger, and 42lb injectors. Previous prop was a 14/19 that when I removed noticed was slightly bent and was gouging the wear ring pretty good. Anyway after x-charger install ski was doing 8100-8200 RPMs and was a bat out of hell. Now will only do 7600 RPMs with new prop and intake. Top speed is same, but no where near previous acceleration. Is this normal? Do I need to install a different intercooler to try and get more power to spin the new prop up? Any input appreciated..


  2. #2
    shrabber's Avatar
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    do you have a xternal intercooler if not get one. I have the same mods a little more but the external intercooler should put you at 8000-8100. Right now it seems you have a little to much prop withs a huge difference

  3. #3
    Yes thanks I have the stock intercooler. This seemed to be the recommendation for prop I had found on here with mods similar to mine and stock IC. Guess I will have to get the Fizzle unit... Was planning to anyway, just not right now.

  4. #4
    MSRXP's Avatar
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    The 15/20 needs to have a little pitch removed.

  5. #5
    shrabber's Avatar
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    or you can repitch the 14/19 until then that way if you pitch the 15/20 you will have to repitch it again just have the 14/19 repaired/pitched

  6. #6
    Got Boost? psycho rxp's Avatar
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    U will need an external IC to run that prop at the proper RPM's

  7. #7
    Thanks all. Do I need to repitch prop if I install a Fizzle intercooler?

  8. #8
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by viperbob View Post
    Thanks all. Do I need to repitch prop if I install a Fizzle intercooler?
    No way to know till You run it.
    Straighten the 14/19 and add some pitch to it right now without external ic. That way you don't have to molest that
    15/20 to gain 500 rpm and then bend it back latter for external ic.
    Props don't need to be bent back and forth alot.

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