How to increase top speed
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  1. #1
    PWCToday Regular
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    How to increase top speed

    Is it possible to increase top speed without changing the impeller. I notice a lot of people on this site bragging about 550's hitting 45mph with an intake grate, ride plate, and bolt on pipe. I just don't see how this is possible unless you are turning more rpm's which would in turn burn out and overheat your engine. I believe 6500 rpm's is what you are looking for at WOT with a proper impeller set up. I'm not that familiar with this stuff so I was just curious how people are doing this and is it safe for the engine.

    Thank you for your input.
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  2. #2
    PWCToday Guru
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    Re: How to increase top speed

    They didnt use a 14 year old kid on the world record stand up ski just for giggles. Im sure the smart ones will chime in for real advice but weight of the rider changes lots of things.

  3. #3
    Frequent Poster jetskijim's Avatar
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    Re: How to increase top speed

    Want to go faster? Make more horsepower! You can get a 550 to spin much faster then 6500RPM, Some guys get them up to 10000, probably more, Higher compression, hotter spark, better fuel intake system, better shaped head domes, lighter components I.E. Flywheel, coupler, driveshaft, Performance exhaust, Watterbox, Ballanced & Welded crank, Cooler plugs, Better spark plug wires, Dual cooling (or bigger line) Porting, Porting, Porting, Hi compression head gasket, Higher octain fuel, Loosing ten pounds, Blueprint the pump, Change the Impeller ( Why wouldnt you its simple and cheap best mod for the money) will all help

  4. #4
    PWCToday.com Is My Home Away From Home 10mm's Avatar
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    Re: How to increase top speed

    Quote Originally Posted by jetskijim View Post
    Want to go faster? Make more horsepower! You can get a 550 to spin much faster then 6500RPM, Some guys get them up to 10000, probably more, Higher compression, hotter spark, better fuel intake system, better shaped head domes, lighter components I.E. Flywheel, coupler, driveshaft, Performance exhaust, Watterbox, Ballanced & Welded crank, Cooler plugs, Better spark plug wires, Dual cooling (or bigger line) Porting, Porting, Porting, Hi compression head gasket, Higher octain fuel, Loosing ten pounds, Blueprint the pump, Change the Impeller ( Why wouldnt you its simple and cheap best mod for the money) will all help

    agreed

  5. #5
    PWCToday.com Is My Home Away From Home 550/440's Avatar
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    Re: How to increase top speed

    550s can get going pretty fast. The aforementioned pretty much sums it up. Get skinny, ride faster... add horsepower, ride faster... get more water through the pump with a good impeller, ride faster! Less water in your exhaust will help top end, there are lots of little "tricks" that can get you going faster, but the impeller is the heart of your performance...
    "needs carb work" is a classic excuse for I don't know wtf is wrong!

    2009 EME Q8, 1100 ADA WB1 with MRD. 2004 BLOWSION RN SJ.

    Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)

  6. #6
    I dream skis THUTCH's Avatar
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    Re: How to increase top speed

    PM sent
    I forgot a few item on the mod ski..In my pm but you get the picture...
    550 will do 40-50 mph
    Last edited by THUTCH; 11-11-2009 at 10:56 PM.
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  7. #7
    I dream skis johnny5's Avatar
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    Re: How to increase top speed

    loose weight!

    92 Yamaha VXR 650 Ocean Pro head, Ocean Pro Vortex flame arester, Twist sponsons, DG Quadra Fin aluminum ride plate, DG performance intake grate, Riva red pipe exhaust, DG aluminum water box, Solas impeller, UMI steering.

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  8. #8
    Spongebob PWCToday.com Is My Home Away From Home attnondeck's Avatar
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    Re: How to increase top speed

    Quote Originally Posted by jetskijim View Post
    Want to go faster? Make more horsepower! You can get a 550 to spin much faster then 6500RPM, Some guys get them up to 10000, probably more, Higher compression, hotter spark, better fuel intake system, better shaped head domes, lighter components I.E. Flywheel, coupler, driveshaft, Performance exhaust, Watterbox, Ballanced & Welded crank, Cooler plugs, Better spark plug wires, Dual cooling (or bigger line) Porting, Porting, Porting, Hi compression head gasket, Higher octain fuel, Loosing ten pounds, Blueprint the pump, Change the Impeller ( Why wouldnt you its simple and cheap best mod for the money) will all help

    oh!! thats it!!! dang ill take 3 of everything!!!!
    Brendan

    1990 SN SJ 701 1990 SN Super Jet 650 Winter build
    1990 550SX
    1994 FX1





  9. #9
    Frequent Poster jetskijim's Avatar
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    Re: How to increase top speed

    Yeah I've got all of that and a few more on mine, Runs really fast, I need to get it on radar or GPS soon,

  10. #10
    Banned motoman96's Avatar
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    Re: How to increase top speed

    you need to be turning WAY more than 6500 rpm's.

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