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Thread: speed problems!

  1. #1

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    speed problems!

    Ok so i have a 2001 GP1200R, and i stepped my sponsons to correct my propoising problems, and now i can only hit 61mph. Before i was hitting 68-70 mph. I have a solas 13/19 impeller, riva ride plat, intake grate, and performace pump cone. What if i put my sponsons back to the way it was, and put washers under trim tabs instead. I need that speed back, so some tips would be much appreciated


  2. #2
    yami_rida#26's Avatar
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    something has to be seriously wrong with your ski no one loses that much top-end by stepping sponsons..with an angled plate you would actually gain speed in some cases...get us some rpm readings..

  3. #3
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by ksako270 View Post
    Ok so i have a 2001 GP1200R, and i stepped my sponsons to correct my propoising problems, and now i can only hit 61mph. Before i was hitting 68-70 mph. I have a solas 13/19 impeller, riva ride plat, intake grate, and performace pump cone. What if i put my sponsons back to the way it was, and put washers under trim tabs instead. I need that speed back, so some tips would be much appreciated
    You are not losing 7 to 9 mph. by stepping your sponsons sounds like you are using your stock speedo to check mph. can't do that they are an average of 10 mph. off you have to use a gps.

  4. #4
    krispaintballz's Avatar
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    Sounds like your using your dreamometer. Like above give us some rpm readings along with some speeds on GPS.

    Damn jim, I type to slow.
    Last edited by krispaintballz; 05-29-2008 at 08:48 PM.

  5. #5

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    Cool

    how are you getting speed# dreamometer? or gps,if you change angle of ski {step sponsons} it will change speed of water across paddle wheel that is used for speed on display

    ask hall pass
    later cd

  6. #6

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    could it be that every other time when i hit 68 or 70, i am using sunoco 94 octane?. today i used shell 93. I could just tell that the throttle was definatly not responsive like when i use sunoco 94. what if i go half way with the sponsons? put them back just enough to where it wont porpoise

  7. #7
    krispaintballz's Avatar
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    What's your compression?

  8. #8
    NIXON'S BACK!! cincygpr's Avatar
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    Stepping sponsons SHOULD only drop you about 1/2 an MPH... you're definately using the stock dream-o-meter speedo.

    And for a stock engine, there's not really much a performance gain from using anything more than 87-octane gas.

  9. #9

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    Something else, I see higher Dream-O-Meter speeds with a Riva/R&D Plate than I see with an OEM plate as well.

  10. #10
    krispaintballz's Avatar
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    Quote Originally Posted by cincygpr View Post
    Stepping sponsons SHOULD only drop you about 1/2 an MPH... you're definately using the stock dream-o-meter speedo.

    And for a stock engine, there's not really much a performance gain from using anything more than 87-octane gas.

    +1

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