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Thread: 100 MPH RPM's

  1. #1

    100 MPH RPM's

    Dose anyone know how many RPM's the 90-100mph skis are turning. How many RPM's can a seadoo pump handel before she blowes up. Our Skat-Trak pumps the best out there?


  2. #2
    dnielsen's Avatar
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    Quote Originally Posted by andreasenracing View Post
    Dose anyone know how many RPM's the 90-100mph skis are turning. How many RPM's can a seadoo pump handel before she blowes up. Our Skat-Trak pumps the best out there?
    They are turning exactly the same RPMs as the engines are, maybe 9000..

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    Moderator beerdart's Avatar
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    90 is achievable @ 8200.

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    um... not what I wanted to hear. how are these speeds achievable with those rpms?

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    home of the dislexic fingers breon's Avatar
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    every 90 mph ski i know of and there are very few...turn 9000 + rpm most of the 90 =100 mph skis are gpr conversions and or and turbo...the new sho 's may bring that number up..well see..

    8200 rpm you are going to be topping out 82 ish ...in s rxp hull..just isnt that efficiant...the gpr hull is faster but in any kind of chop...

    the reason for the rpm is they just dont make a big enough prop if you keep adding pitch to controle the rpm the prop gets out of its efficiancy range..and you don tgain the speed just controle the rpm...

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    Moderator beerdart's Avatar
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    Quote Originally Posted by beerdart View Post
    90 is achievable @ 8200.
    With a GPR hull.

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    "Hustler" Inkaddict's Avatar
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    Depends on the ecu and motor and tune. I bet theres some pretty high rpm 4 techs out there.

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    home of the dislexic fingers breon's Avatar
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    Quote Originally Posted by beerdart View Post
    With a GPR hull.
    dont know maybe think it may be close...most have a hard time getting 80 on a rxp with stock ecu ...speedskixp is the exception ..his boat is so far out of the water it looks silly

  9. #9
    Moderator beerdart's Avatar
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    Very true the RXP hits a wall @ 80. Like an F4 LOL..

  10. #10
    home of the dislexic fingers breon's Avatar
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    it is a big wall ...too....getting to 80 was easy ..riva ecu ..ride plate ..xs intecooler and x charger...look at all the stuff i have done ..and i am only mid 80s now..

    hoping this is going to be a big sledge hammer fo that wall


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