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  1. #1
    suckondeez's Avatar
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    gpr-sho prop advice

    so..this question is for all you guys that have tuned gpr-sho conversions..i need to do my prop soon as i am bouncing off the limiter at about 63 mph..and only a little more than halfway on the throttle. the motor is completely stock minus the factory airbox. what pitch prop should i be looking at? from the reading ive done im guessing 14-25 maybe?


  2. #2
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by suckondeez View Post
    so..this question is for all you guys that have tuned gpr-sho conversions..i need to do my prop soon as i am bouncing off the limiter at about 63 mph..and only a little more than halfway on the throttle. the motor is completely stock minus the factory airbox. what pitch prop should i be looking at? from the reading ive done im guessing 14-25 maybe?
    what pump?
    what nozzle?
    what prop in there now?
    what pitch?

  3. #3
    suckondeez's Avatar
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    sorry, the entire pump right now is stock sho + the 2" extension from a gpr.. the stock prop is 12/19 i believe

  4. #4
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by suckondeez View Post
    sorry, the entire pump right now is stock sho + the 2" extension from a gpr.. the stock prop is 12/19 i believe
    so its the 83mm nozzle?

    you want to stick with the stocker, or go with an aftermarket impeller?

  5. #5
    suckondeez's Avatar
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    Quote Originally Posted by WFO View Post
    so its the 83mm nozzle?

    you want to stick with the stocker, or go with an aftermarket impeller?
    well at first im gonna stick with bending the stock one, beerdart cant wait to help me repitch to get some real speed, but im asking about this for when i buy an aftermarket one..once i get some more cash..doin 2 of these at once is gettin a little redicoulous on price

  6. #6
    Duke's Avatar
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    Stock prop pitch and aftermarket pitch is not going to be the same due to different root angles. Just pitch the stocker till its off the limiter.

  7. #7
    suckondeez's Avatar
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    Quote Originally Posted by Duke View Post
    Stock prop pitch and aftermarket pitch is not going to be the same due to different root angles. Just pitch the stocker till its off the limiter.
    i know there not going to be the same..but id like to know what size aftermaret prop to buy

  8. #8
    Duke's Avatar
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    Quote Originally Posted by suckondeez View Post
    i know there not going to be the same..but id like to know what size aftermaret prop to buy
    I believe it was a DF pitched to 15-22 on Shodude's ski when it was stock running 81mph at 7600 rpm. That was with 1200 grate and 85mm nozzle I'm pretty sure.

    Rich (WFO) probably has a DF for that pump already.

  9. #9

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    Quote Originally Posted by Duke View Post
    I believe it was a DF pitched to 15-22 on Shodude's ski when it was stock running 81mph at 7600 rpm. That was with 1200 grate and 85mm nozzle I'm pretty sure.

    Rich (WFO) probably has a DF for that pump already.
    I believe we were using the 83 nozzle. The DF pitch sounds right from what I can remember.

    We never used the stock prop in my conversion.

  10. #10
    YAMAHA FACTORY GAME OVER's Avatar
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    Do you want a real pitch n dont have too look any places else here is the best can help u mandy's performed he does all my prop n never fail 305 219 1219

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