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  1. #1
    hero's Avatar
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    prop pitch and rpm

    took my rxt out today for a test, was a bit windy tho
    my mods r on my signature but tested it with a 15/20 prop.
    at WOT the ski sat at 8160 8180 and ran 113kph on gps
    shouldnt i be getting more speed with my setup?.

    with the 14/19 i felt the hole shot better and pickup speed alot quicker then 15/20.
    also at WOT 14/19 sat at 8160 8180.
    would 15/20 be a lil to much for my ski?.

    what do u think about repitching the stock rxt prop? they come standard 10/21


  2. #2
    geowelsh's Avatar
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    I would think there should have been an RPM difference between these 2 props. How's the wear ring, carbon seal? Is it cavitating at all?

  3. #3
    mac_man_luke's Avatar
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    if you were on 8180 with the 14/19 and the 15/20 it sounds like your on the limiter.

    I know jerry recommended a 15/20 for me with an xcharger without an external IC.

  4. #4
    hero's Avatar
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    wearing was change during the new prop got installed.
    carbon seal is still good the ski has 24 hours on it.
    no cavitation as the hole shot is great
    i would thought going 15/20 would drop the rpm as i was sitting on the limiter with the 14/19.
    but made no difference.

    i installed a 15/20 on a friend stock rxtx and it at on 8100 at WOT

  5. #5
    Mothman's Avatar
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    You're at sea level making good power! Try a 15/22. If it won't turn it, de-pitch a little.

  6. #6
    hero's Avatar
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    im gonna try repitching the 15/20 first and if that doesnt work, then start playing with the nozzle ring size..
    is there a nozzle ring that we can buy to fit the oem nozzle?? i want to keep my OPAS and you need to remove the OPAS to fit the riva pro series nozzle..what other alternative?

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