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  1. #1
    Antiguan FZR's Avatar
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    Riva X-Charger Upgrade

    This upgrade is worth every penny.

    Compared to the stock charger the power comes on much stronger.

    Pulled 8500 on the 15/22 +2mm. Did not get to GPS.


  2. #2
    Site Admin Green Hulk's Avatar
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    Glad you like it. I've heard good things about it from others.

  3. #3
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    Has anyone found out the exact boost increase @ 8100 rpm with this upgrade

  4. #4
    mtrager's Avatar
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    Suppose to be around 13lbs.

  5. #5

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    Quote Originally Posted by bigdaddyRXP View Post
    Has anyone found out the exact boost increase @ 8100 rpm with this upgrade
    i have one and i am still tuning first run was @8180/8200 with a 15/20 i was @ 75mph with 12.5 psi 60 degree air. second run i put a repitched 14/19 to a 15/22 53 degree air rpms were 7980/8020 i was at 76.9 @ 11psi both runs were done with gps

  6. #6
    danieletrono's Avatar
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    Quote Originally Posted by busa504 View Post
    i have one and i am still tuning first run was @8180/8200 with a 15/20 i was @ 75mph with 12.5 psi 60 degree air. second run i put a repitched 14/19 to a 15/22 53 degree air rpms were 7980/8020 i was at 76.9 @ 11psi both runs were done with gps
    the 14/19 is a 3 blade? Isa 3 bladebetter top speed than a4 ?

  7. #7
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by danieletrono View Post
    the 14/19 is a 3 blade? Isa 3 bladebetter top speed than a4 ?
    14/19R is a 4 blade.

  8. #8
    Site Admin Green Hulk's Avatar
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    Something that most people don't know about this supercharger upgrade is it's essentially a mini 2rude charger. It's the same impeller design but smaller 137 mm diameter. This is why it performs so good

  9. #9
    Wakeskate or Die!!! RobbieMWD's Avatar
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    Quote Originally Posted by busa504 View Post
    i have one and i am still tuning first run was @8180/8200 with a 15/20 i was @ 75mph with 12.5 psi 60 degree air. second run i put a repitched 14/19 to a 15/22 53 degree air rpms were 7980/8020 i was at 76.9 @ 11psi both runs were done with gps
    That's some nice numbers. I still don't understand how you can go faster with less RPM's though. I'm clueless when it comes to props.

  10. #10
    agibbs's Avatar
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    Quote Originally Posted by RobbieMWD View Post
    That's some nice numbers. I still don't understand how you can go faster with less RPM's though. I'm clueless when it comes to props.
    In order to understand this concept you must understand that it is harder to turn a higher pitched blade (15/20) than a lower pitched blade (14/19). The number on the impellers (14/19) represents the distance it travels forward in once rotation. PWC's have two pitches for optimal acceleration and top speed. Also, there is a science behind the factory pitch. What makes your ski run at only 8000rpms out of the box? Why is it not on the limiter at 8200rpms? The engineers at Seadoo researched the optimal pitch to use with the stock engine. The pitch of the stock prop keeps the rpms down under the limiter.

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