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  1. #1

    reduction nozzle vs impeller pitching

    Is there a point at which you do one over the other or is it just trial and error?


  2. #2
    JFizzleJR's Avatar
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    There's definitely a point. You want to get the most aggressive pitch possible that the ski can handle. The nozzles are more for fine tuning for weather conditions etc.

  3. #3
    FIRED!!! JP's Avatar
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    Quote Originally Posted by JFizzleJR View Post
    There's definitely a point. You want to get the most aggressive pitch possible that the ski can handle. The nozzles are more for fine tuning for weather conditions etc.
    Do I have the right idea:
    Tune the prop for the 83 ring then fine tune from there?

    JP

  4. #4
    V-Tec, 4-Tech that's how I roll meirvin's Avatar
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    well it depends on when you tune(temps), I tune for the 81mm then when it gets really hot here in texas I can switch to 82 or 83 to get RPMs back

  5. #5
    AKA: Larry lafjax's Avatar
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    Quote Originally Posted by meirvin View Post
    well it depends on when you tune(temps), I tune for the 81mm then when it gets really hot here in texas I can switch to 82 or 83 to get RPMs back
    +1 JP, I think 81mm is the sweet spot then you can go up or down depending on the humidity and temp so you are set for winter riding or summer riding.

  6. #6

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    It seems to me that pitching the prop worked better to reduce rev's and maintain acceleration. As of now, I've pitched the prop up to 15/24 and gone down to an 81 nozzle. Maybe it's in my head, but it seems like the smaller nozzle hurt the accel more than the prop did.

  7. #7
    suck my wake's Avatar
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    Small nozzle's KILL acceleration

  8. #8
    ctriverguy's Avatar
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    just to chime in, as the X guys continue to play with our skis, reports are coming back that the 82mm seems to be the popular choice for the best speed. there also seems to be a big difference between the 83 and 82 as far as acceleration goes. more reports to come...

  9. #9
    agibbs's Avatar
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    Riva just told me that decreasing the exit diameter on the X boat nozzles will increase rpms. Is this true? It goes against all the physics of why we have been using the reduction nozzle in the first place.

  10. #10
    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by agibbs View Post
    Riva just told me that decreasing the exit diameter on the X boat nozzles will increase rpms. Is this true? It goes against all the physics of why we have been using the reduction nozzle in the first place.
    makes me wonder. i can only turn the 15/22 to 7,850 rpm with stock 86.6 mm. I cant see how reducing the nozzle would even come close to increasing my rpms. Also i am at 2,600 ft with 100 to 105 degrees out the last 2 times.

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