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  1. #1
    State of Confusion BartenderSmalley's Avatar
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    What creates speed - weight or engine? Why is the RXP as fast....

    ....as the RXT???

    So the '04 RXP had a 215hp motor and ran about 65-67 stock. And the current '08 RXT has a 215hp motor in it and runs about 65-67 stock...but being a 3 seater, I am assuming it weighs more than my '04 2-seater....so why are the speeds roughly the same???

    Obviously, weight makes a huge difference..but the same motors, in different skis running the same speeds....??

    What brings this up is the conversions people are doing - taking a motor out of a ski that runs 60mph, and putting it into a 2 seater hull and running over 80mph???


  2. #2
    SHO stopper palmbeach jesse's Avatar
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    3 mph is alot. plus some new tech stuff in the 08....try to compare same year rxt &rxp... 2-4 mph diff......
    run them next to each other and the rxp walks away at 2-4 mph....

  3. #3
    State of Confusion BartenderSmalley's Avatar
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    Quote Originally Posted by palmbeach jesse View Post
    3 mph is alot. plus some new tech stuff in the 08....try to compare same year rxt &rxp... 2-4 mph diff......
    run them next to each other and the rxp walks away at 2-4 mph....
    Ok, so the years of technology have somewhat offset the differences in the engines...so the same motor from TODAY is faster than the same motor from 4 years ago. I figured it was something like that....

    I am just stunned by some of the MASSIVE differences with the conversion skis and how fast they are running.

  4. #4
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    Quote Originally Posted by BartenderSammy View Post
    Ok, so the years of technology have somewhat offset the differences in the engines...so the same motor from TODAY is faster than the same motor from 4 years ago. I figured it was something like that....

    I am just stunned by some of the MASSIVE differences with the conversion skis and how fast they are running.

    Alot of it has to do with the efficiency of the hulls.. The Yamaha hull had alot less motor meaning the engineers could be much more aggressive with the hull and the same but opposite for the RXP, with so much extra horse power IMO they threw every speed break possible to slow the RXP down..

  5. #5
    YoYamma's Avatar
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    Couple of points...

    1. Water conditions apply here, certain hulls will perform better in specific environments. I have never been passed by a stock 215 RXP in the chop.

    2. You don't always have to go to a different hull or a 2 seater to exceed 80 mph, as shown here:
    http://greenhulk.net/forums/showthre...ht=monster+rxt
    http://greenhulk.net/forums/showthread.php?t=75080

  6. #6
    SHO stopper palmbeach jesse's Avatar
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    Quote Originally Posted by Alex13 View Post
    Alot of it has to do with the efficiency of the hulls.. The Yamaha hull had alot less motor meaning the engineers could be much more aggressive with the hull and the same but opposite for the RXP, with so much extra horse power IMO they threw every speed break possible to slow the RXP down..
    every brake.... its pretty eazy to get good speed.....

  7. #7
    SeaGoat's Avatar
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    I'm sure someone could modify a rideplate to get the 3 seater hulls up out of the water to reduce the wetted surface. Length brings stability to a boat hull. High speeds require stability for anything but perfect glass water.

  8. #8
    pro12,txi,msx140 SMOKEWAGON's Avatar
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    Hey !!!! That Seagoat chit is so fast compared to polaris what is the point? The seadoo folks just need to make a bigger fuel tank ! Then there will be no more argument.


    smoke

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