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  1. #1

    Top speed in USA

    Dear friends for me is very incredible your pwc are very fast or your GPS are broken, i mod. rxt x 2008 with this parts with rotax racing parts: valve ( in-exs ) and reteiners-ecu-impeller supercharger with spacer-riva intake grate- special clucth for supercharger-ingectors-impeller solas 14/17-air filter-and pump is stock 87mm-and my max speed is 75mph to 8800 rpm with my GPS sea level , yes is possible change diameter nozle for additional more mph but my acceleration finish, now i have dragster if i change ring for arrive to max speed 10 seconds more, for me no good .FOR ME PWC ISBEAUTIFUL BECAUSE HAS MORE ACCELERAION:. sorry for my english i live in ITALY ciao all guys


  2. #2
    Mod less, ride more! troyheb's Avatar
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    Sounds like you did a great job with you ski. I can tell you from being at Mud Bug this year, their gps's are not broken.

  3. #3
    Having Fun jp1300r's Avatar
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    What ecu do you have? If its a Rotax, you are on the limiter.

  4. #4
    Bow chicka wow wow
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    CHECK OUT 4TEC SPEEDS AND DATABASE........................BELIEVE ME IT IS FOR REAL. 96+mph kind of hurts your feelings now don't it?

  5. #5
    Is that the correct pitch Impeller for top speed ?

  6. #6
    Quote Originally Posted by David_HX_RXP View Post
    Is that the correct pitch Impeller for top speed ?
    +1

  7. #7
    ROTAX RACING performance
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    75 mph on a rxt with 87 mm nozzle is very fast , try a 83 mm 215 nozzle, and your speed will increace for sure . a bigger impeller would also help

    you should not complain about others GPS, first you have a RXT-X, your SC boost is low as you only running a X upgrade SC Impeller, 2nd you have the absolute wrong nozzle diameter and impeller for topspeed.

  8. #8
    Quote Originally Posted by mrracing View Post
    75 mph on a rxt with 87 mm nozzle is very fast , try a 83 mm 215 nozzle, and your speed will increace for sure . a bigger impeller would also help

    you should not complain about others GPS, first you have a RXT-X, your SC boost is low as you only running a X upgrade SC Impeller, 2nd you have the absolute wrong nozzle diameter and impeller for topspeed.
    83mm Nozzle with a 15/22r prop is wicked!

  9. #9
    ROTAX RACING performance
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    for 8800 RPM with only 14 psi the 15/22 on a rxt-x hull is to big on a 83 mm nozzle

  10. #10
    Quote Originally Posted by mrracing View Post
    for 8800 RPM with only 14 psi the 15/22 on a rxt-x hull is to big on a 83 mm nozzle
    Malte, I am running a 15/22r on a stock ECU RXT pushing 13 lbs of boost! This is untouched out of the box and getting 8120 rpms in 88-90 degree water! This is on a 82mm ring.

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