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  1. #1
    ROTAX RACING performance
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    FS : ultimate conversion lightweight RXP topdeck

    70 lb less than stock weight, perfekt quality, can be fitted to GPR bottom hull

    2900 USD shipped to any Airport on the US east coast or middle east/ (U.A.E /Qatar)
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  2. #2

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    are they exact fit for the bottom GPR hull ? or do i have to do some modifications ?

  3. #3
    ROTAX RACING performance
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    it is not the perfekt fit, but there are people that have done this, also in the forum. the last winner of the hydro drag with 96 mpH had a lightweight RXP topdeck with a GPR bottom

  4. #4

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    Quote Originally Posted by mrracing View Post
    it is not the perfekt fit, but there are people that have done this, also in the forum. the last winner of the hydro drag with 96 mpH had a lightweight RXP topdeck with a GPR bottom
    That would be me.It can be done but it is a lot of work the RXP top deck is about 3 inches wider and about 6 inches longer.But when it is done you have the best of both worlds IMO.I dont like the width of the GPR seat.

  5. #5
    Duke's Avatar
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    Quote Originally Posted by rab1 View Post
    That would be me.It can be done but it is a lot of work the RXP top deck is about 3 inches wider and about 6 inches longer.But when it is done you have the best of both worlds IMO.I dont like the width of the GPR seat.
    Could have fooled me because it looks perfect now!!!! Guess it helps to own a major bodyshop.

    Crazy things people do for brand loyalty!

  6. #6
    Moderator RX951's Avatar
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    wow, can you imagine this on a Carbon Fiber GPR hull

  7. #7
    ADSR's Avatar
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    The power to weight ratio formula is 12.2lbs = 1hp.

    So from a 70 pound drop, you're gaining like 6hp.

    You also gain in handling and fuel economy from the drop.

  8. #8
    Greenhulk Grasshopah (DRC) HallPass's Avatar
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    Quote Originally Posted by ADSR View Post
    The power to weight ratio formula is 12.2lbs = 1hp.

    So from a 70 pound drop, you're gaining like 6hp.

    You also gain in handling and fuel economy from the drop.
    where is that ratio found? How do you know it is correct the

    12.2lbs = 1hp

  9. #9
    Fat Man, Little Boat Region8Ultra250X's Avatar
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    Quote Originally Posted by HallPass View Post
    where is that ratio found? How do you know it is correct the

    12.2lbs = 1hp
    you divide power by weight and it gives you the ratio.

    which on a very basic calculation for a stock motor conversion would be

    3.04 lbs/ per hp

    so shaving 60lbs. off a conversion would be the equivalent of adding roughly 20hp

  10. #10
    ADSR's Avatar
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    Quote Originally Posted by Region8Ultra250X View Post
    you divide power by weight and it gives you the ratio.

    which on a very basic calculation for a stock motor conversion would be

    3.04 lbs/ per hp

    so shaving 60lbs. off a conversion would be the equivalent of adding roughly 20hp

    That sounds better. I googled it and it gave me the 12.2??

    Wikipedia

    Power-to-weight ratio (specific power) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power sources. It is also used a measure of performance of a vehicle as a whole, with the engine's power output being divided by the curb weight of the car, to give an idea of the vehicle's acceleration.

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