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  1. #1

    XXX charger impeller 15/19, 15/20 or 15/21???

    Guys! Need Advice! what screw is better suited for a closed course? (to accelerate from buoy to buoy) RPM would like to 8700-8800
    Last edited by petroracing.kitins; 07-25-2013 at 02:04 AM.


  2. #2
    SLASHER's Avatar
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    What ski u running ?

  3. #3
    jet ski during assembly! T3 cabron hull, OEM pump, XXX supercharger,Riva ecu,50 injector,open loop cooling,vavlve spring, Light Weight Valve.
    p.s.I am for 15/19

  4. #4
    Moderator Snoman's Avatar
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    15/20 IMO would be what you would want to go with with some minor tweeking to get yor RPMs dialed in..

  5. #5
    ou812's Avatar
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    Any 3 blade that will match that rpm will do.. 14/20, 13/21... 84mm 85mm nozzle

  6. #6
    www.eastcoastpwc.net Scott's Avatar
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    Quote Originally Posted by ou812 View Post
    Any 3 blade that will match that rpm will do.. 14/20, 13/21... 84mm 85mm nozzle
    Why a 3 blade vs 4?

  7. #7
    SLASHER's Avatar
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    Keep an eye on the XXX , check every race ... They don't like running over 10 hrs between rebuilds . I use to use one for CC racing and they flog out quickly ..

  8. #8
    Mothman's Avatar
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    3's give more 'bite', but will sacrifice some top speed.

  9. #9
    Mothman's Avatar
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    Quote Originally Posted by SLASHER View Post
    Keep an eye on the XXX , check every race ... They don't like running over 10 hrs between rebuilds . I use to use one for CC racing and they flog out quickly ..
    I ran the poo out of my xxx for 20 hours through chop, getting to know the limiter waaaaay to well--didn't lose any slip. I admit I abused it--but it held up great. Ran it awhile longer without abusing the limiter as much (ok a little ), still didn't lose slip. Just installed a new et charger and my xxx is sitting on the shelf and I shit you not, only lost about 1lb after everything I did to it. Still have shims and washers left over from not needing to use them.
    I'm saving it for a 'fun' backup ski.

  10. #10
    Thank you very much guys!!Then write the results!

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