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  1. #1

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    Pump Stators ???

    Ok here we go if you have a ski and you want to run top speed which stator would you use a 5,6,7,8,or 12
    Now if your top speed is good but your burning the prop on the bottom which one would work best for good bottom end and top speed any info would be GREAT


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I'd shoot Bruce at Wetwolf.com a PM, this would be right up his alley.

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    If you are already using the impeller with the best grip on the water for launch, then you are looking at increasing the stator vane count and/or messing with the exit nozzle diameter.

    Are you running a stock jet pump nozzle diameter?

    AAT, or stock tail cone?

    Stock intake grate?

    The 6, 7 and 8 vane stators seem to be favored for combo of top speed and acceleration, with the nod to the 8-vane in rough water.

    12-vane stator would probably reduce cavitation by increasing water pressure around the impeller, but at some cost to top speed.

  4. #4

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    no clue it has an 8 vane with a 7.5 nujet and a stock grate not sure on the nozzle stock cone and it's burning the HELL out of the prop on the bottom end

  5. #5
    Connecticut CrazyA's Avatar
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    Keep the 8 vaner in there and have the NuJet modded for more hookup or switch to a Skat swirl prop.

    No need for more than an 8 vaner in my opinion, unless you're closed course racing in the rough.

    oh yeah, and an AAT.

    What are your RPM's on top?


    Quote Originally Posted by 785 lugs View Post
    no clue it has an 8 vane with a 7.5 nujet and a stock grate not sure on the nozzle stock cone and it's burning the HELL out of the prop on the bottom end

  6. #6

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    Quote Originally Posted by CrazyA View Post
    Keep the 8 vaner in there and have the NuJet modded for more hookup or switch to a Skat swirl prop.

    No need for more than an 8 vaner in my opinion, unless you're closed course racing in the rough.

    oh yeah, and an AAT.

    What are your RPM's on top?
    i think Mark said around 7700-7750 i won't get it out for a week or so ,i like the AAT idea

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 785 lugs View Post
    no clue it has an 8 vane with a 7.5 nujet and a stock grate not sure on the nozzle stock cone and it's burning the HELL out of the prop on the bottom end
    How much power are you putting out?

    I'm guessing this isn't a stock engine

    Are you sure the pump area is well sealed from air leaks?

    Ventilation can seem a lot like cavitation. At launch, the impeller creates a suction (negative pressure) in the pump intake.

    As soon as you start to build some speed, the intake tunnel becomes pressurized from the forward motion (positive pressure).

    An air leak in the pump or tunnel anywhere forward of the impeller will allow air bubbles into the water stream, which will cause the impeller to lose its grip on the water. Aerated water doesn't pump efficiently.

    As soon as the pump tunnel becomes pressurized from forward hull speed, the air leaks flow the other way, letting some water out. But now there are no air bubbles in the intake water stream, and the impeller can get a proper grip on the water.

    Air leaks at the through-hull fitting, pump base or shoe, even the ride plate can allow air into the pump tunnel.

  8. #8

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    It's the 1350 Matrix the pump and shoe and plate look very well sealed up i think it's more of a power issue

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by 785 lugs View Post
    It's the 1350 Matrix ... I think it's more of a power issue
    Well, you could convert to the larger SeaDoo jet pump, which is what one of the MSX conversions is doing...

    Rotax powered Polaris MSX


  10. #10

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    Quote Originally Posted by K447 View Post
    Well, you could convert to the larger SeaDoo jet pump, which is what one of the MSX conversions is doing...

    Rotax powered Polaris MSX


    Thats what i'm thinking about i heard Paul Picked up 4-5mph with his Polaris 155mm pump he got from Skat Trak

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