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  1. #1
    skigolfnut's Avatar
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    speeds with the ET-68-140?

    The Pro Watercross Tour has changed the R/A Limited class to R/A Superstock across the board,
    how much speed are you guys seeing with the Et 68-140 chargers? and what injectors are you using?


  2. #2
    Sanfish's Avatar
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    Quote Originally Posted by skigolfnut View Post
    The Pro Watercross Tour has changed the R/A Limited class to R/A Superstock across the board,
    how much speed are you guys seeing with the Et 68-140 chargers? and what injectors are you using?
    As with most bigger wheels, acceleration is what is mostly gained.

    Was a 137+4 SC wheel allowed before or only OEM?

    BTW: This new rule is interesting because of the "talk" (rumours) about the 2016 PX possibly using a 68-140.

  3. #3
    skigolfnut's Avatar
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    this is the new Pro Watercross tour classes,
    they are not affiliated with the IJSBA anymore, my ski is set up IJSBA limited legal which means you have to use a stock supercharger housing but can have a spacer, I currently run the et3mm spacer and was competitive in the limited class,

    in superstock you can have any supercharger or even a turbo,
    I was thinking the cheapest route to get the ski faster,
    I am running 80lb injectors with a torx racing ecu at 8900 rpms

    2015 PRO WATERCROSS TOUR CLASSES

    Junior Ski Stock 10-12 yr

    Junior Ski Stock 13-15 yr

    Amateur Ski Stock

    Amateur Ski GP

    Women's Ski Limited

    Veteran Ski GP

    Pro-Am Ski Stock

    Pro-Am Ski GP



    Amateur Freestyle

    Pro Freestyle



    Pro-Am Runabout Stock

    Pro-Am Runabout Superstock

    Pro-Am Runabout Open

    Amateur Runabout Stock

    Amateur Runabout Superstock

    Runabout Box Stock

    Runabout N/A

    Runabout 1000 cc and under

    Veteran Runabout Superstock

    Women's Runabout Stock



    Sport Spec

    Sport GP



    Beginner Runabout Stock

    Beginner Ski Stock

  4. #4
    imp0ster's Avatar
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    83.4 reliably in salt. Add 1 for fresh. I tagged 84 once or twice before I started blowing off the oil cap and going into limp mode so we won't count that one.

    80# injectors

  5. #5
    AtoMIC_OraNGE greenbullet's Avatar
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    Good charger. For sure

  6. #6
    boost junkie skidoochris's Avatar
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    mine ran 200kpa @9000 about 84mph
    I like bosch 1150 injectors

  7. #7
    koftis's Avatar
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    Quote Originally Posted by Sanfish View Post
    Quote Originally Posted by skigolfnut View Post
    The Pro Watercross Tour has changed the R/A Limited class to R/A Superstock across the board,
    how much speed are you guys seeing with the Et 68-140 chargers? and what injectors are you using?
    As with most bigger wheels, acceleration is what is mostly gained.

    Was a 137+4 SC wheel allowed before or only OEM?

    BTW: This new rule is interesting because of the "talk" (rumours) about the 2016 PX possibly using a 68-140.
    2016 PX according to inside iformation of Rotax is going to be 135mm supercharger redesigned with other bearinngs, not 140 as most rumours from journalists are saying. And the reason is reliability. More power is going to come from the stroker engine.

  8. #8
    SLASHER's Avatar
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    Let's hope they run an oil feed to the bearings .I seen 3 riders here with oil feed to SC and increases bearing life dramatically on big SC ...

  9. #9
    imp0ster's Avatar
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    I don't run the 08 shaft oiler and am fine. From what I've seen on the shafts I'm not sure how it lubes that much better. The amount of oil being thrown up onto the SC shaft is crazy. This is the reason so much oil can escape from the seal in the SC housing. I think it's more about coming unhooked with a big charger that kills them.

  10. #10
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    Only time you don't unhook in cc is the first lap.... gonna be hard on that size charger

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