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  1. #1
    i hate my bipolar disorder its great
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    Repitching impeller or replacing?

    Just wondering what the difference between having the pitch modded on my 14/19 vs buying a 15/20
    can a 14/19 be "bent" to 15/20 specs? or is it more a small tweck to gain couple rpms?

    the ski is a 2004 rxp

    current setup is or was
    x charger
    42lbs injectors
    14/19
    R&D intake grate
    ride plate holes, reverse bucket
    riva sponsons
    riva free flow pipe
    30deg cooler thermostat
    fizzle 4"intake
    4" intake adaptor

    new set up
    is above plus

    fizzle cooler kit, water filter kit and will add extra breather mod too cooler too
    shorty/gutted waterbox
    Et-137 compressor wheel
    R&D anti cavitation cone
    solas impeller nose cone
    Riva fuel pressure reg

    whats the best bet?
    my next stage after this once it gets cold will be rebuild the head and up the limiter with new ecu tune, also any other suggestions/ mods that i should consider?
    hopefully run 80miles with above setup before i do the head?


  2. #2
    mac_man_luke's Avatar
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    The 15/20 has a better blade design so you will get more speed from the same pitch.

  3. #3
    i hate my bipolar disorder its great
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    Quote Originally Posted by mac_man_luke View Post
    The 15/20 has a better blade design so you will get more speed from the same pitch.
    sweet 15/20 seems like a decent impeller or should i go something more aggersive

  4. #4
    monaroman76's Avatar
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    Wouldn't a 15/22 be better suited to that setup?

  5. #5
    i hate my bipolar disorder its great
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    Quote Originally Posted by monaroman76 View Post
    Wouldn't a 15/22 be better suited to that setup?
    honestly unsure taking suggestions ?

  6. #6
    monaroman76's Avatar
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    I think you would have to add a lot of pitch to a 15/20 to keep it off the limiter. I think the 15/22 would be the better option. You still may need to add some pitch.

  7. #7
    warner0308's Avatar
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    i got almost the same setup except the 137 wheel, should i go with the same pitch 15/22? {not trying to steal thread} we need more replys on both these set ups. thanks guys

  8. #8
    warner0308's Avatar
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    i got almost the same setup as cracker, except the 137 wheel, should i go with the same pitch 15/22? {not trying to steal thread} we need more replys on both these set ups. thanks guys

  9. #9
    Speedaddict's Avatar
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    With stock X Charger and aftermarket intercooler, I was at about 8100rpm in September last year on a 15/20R with the stock 83mm nozzle.

    With more boost (taller 137 wheel) you will need more pitch or smaller nozzle to stay away from rev limiter.

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