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  1. #1
    Turbofab's Avatar
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    Impeller question?

    So I have a 14/19 in my ski now and even in the 90 deg water i am on the stock limiter, i have repitched 4mm and its still at 8150-8200 rpm. I have a 15/20r impeller i could put on it but i dont want to be over propped. What do you guys think. should i throw it on and de pitch it as needed?

    Mods
    05rxp
    stock ecu
    external intercooler
    4in front intake
    mod water box
    3in rear exhaust
    trued hull
    modified ride plate.
    14/19 at the moment.


  2. #2
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    You left out one of the most important things..... what charger?

  3. #3
    Turbofab's Avatar
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    Quote Originally Posted by BigDaddyRXP View Post
    You left out one of the most important things..... what charger?
    still on the 215 charger.

  4. #4
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Your not ready for the 15/20 then (maybe in the winter). Keep adding pitch to that 14/19 to get you off the limiter... your close with it!

  5. #5
    Turbofab's Avatar
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    how much pitch can you add before it becomes in efficient

  6. #6
    JFizzleJR's Avatar
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    Stock nozzle size still? If you've repitched 4mm it's time to go with the 15/20 and depitch it until you get your target RPM. Either that or drop the nozzle size to 81mm or 80mm.

    Quote Originally Posted by Turbofab View Post
    So I have a 14/19 in my ski now and even in the 90 deg water i am on the stock limiter, i have repitched 4mm and its still at 8150-8200 rpm. I have a 15/20r impeller i could put on it but i dont want to be over propped. What do you guys think. should i throw it on and de pitch it as needed?

    Mods
    05rxp
    stock ecu
    external intercooler
    4in front intake
    mod water box
    3in rear exhaust
    trued hull
    modified ride plate.
    14/19 at the moment.

  7. #7
    Turbofab's Avatar
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    Yes still on the stock nozzle. I'm gonna throw it on and see where the rpm is at

  8. #8
    Turbofab's Avatar
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    So I never got it answered. But how many mm can you pitch the prop before it becomes inefficient?

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