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Thread: how much hp

  1. #1

    how much hp

    hi guys how much hp a 07 rxp with eveything in the the stage 3 kit has and is their any other way to get big hp


  2. #2

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    255 hp. Add a Rude and you're probably around 275 hp. Add 2Rude and you'd be around 290 hp.

  3. #3

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    You sure about that, Mike? Just the stock RXP-X is close to 255hp, which is approximately stage 2; Riva dyno'd a stage three at 296hp. The extra RPM really kicks up the HP. If you can fuel it right, adding a Rude-type SC should have you well above 300.
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  4. #4
    agibbs's Avatar
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    Quote Originally Posted by engineermike View Post
    255 hp. Add a Rude and you're probably around 275 hp. Add 2Rude and you'd be around 290 hp.
    Those numbers are low, 295hp with stage 3, and well over 300hp for both the rude and 2rude.

  5. #5
    JFizzleJR's Avatar
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    Riva's dyno has been rumored to be generous, same with Seadoo's

    Another way to get there is have your stock s/c rear cover machined to 140mm and put a new 2rude and front housing on it. Then get a rude RRFPR and 42# injectors. An XS intercooler kit, 15/22r prop, riva rear air intake.. That should put you close to 80.

  6. #6
    Quote Originally Posted by JFizzleJR View Post
    Riva's dyno has been rumored to be generous, same with Seadoo's
    Yea those numbers are closer to the addvertised RXP-X/T numbers than that dynochart.

  7. #7
    Quote Originally Posted by JFizzleJR View Post
    Riva's dyno has been rumored to be generous, same with Seadoo's
    Yep. Rotax Racing dyno'd the RXP215 at 195HP. I believe they dyno'd a Riva Stage 3 at around 260HP.

    Rotax Racing dyno'd a RXP-X at 243HP.


    Nils is supposed to have a dyno set up sometime, not sure when. It will be interesting to see what he gets with different setups.

  8. #8
    ROTAX RACING performance
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    RXP-215 207 HP
    RIVA stage 3 was 270 HP on the dyno
    RIVA stage 3 + Rudes 1 ca. 290 real HP /8500 RPM on the dyno

    42 injectors + rudesregulator can never not supply enough fuel for 300+!!!

  9. #9
    Quote Originally Posted by mrracing View Post
    RXP-215 207 HP
    RIVA stage 3 was 270 HP on the dyno
    RIVA stage 3 + Rudes 1 ca. 290 real HP /8500 RPM on the dyno

    42 injectors + rudesregulator can never not supply enough fuel for 300+!!!
    Thanks for the clarification Malte.

  10. #10
    seadoor's Avatar
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    why the a/f its high 13.+

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