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  1. #1
    lextoy's Avatar
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    green wheel, what else do i need??

    right now i got my 2003 GTX SC
    with
    R&D air intake
    GH waterbox
    no opas
    filled plate holes
    pump wedge
    upgraded pump with a 12/20 impeller, still the GTX SC size wear ring...

    i am getting 63 mph and 7100 rpm.
    i know i should be tuned to 7600 rpm, i can either bend the impeller, or get more HP...
    if i get my SCer rebuilt to 08 specs, and get a greenwheel also, what else do i need to do to the engine to make it run, upgrade injectors? upgrade fuel pump?? anything??
    i want one last simple upgrade to make more power, but i dont want to have to deal with a cascade of other parts upgrades...
    anything simple i can do to get my impeller spinning up to 7600?


  2. #2
    Banned User
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    Quote Originally Posted by lextoy View Post
    right now i got my 2003 GTX SC
    with
    R&D air intake
    GH waterbox
    no opas
    filled plate holes
    pump wedge
    upgraded pump with a 12/20 impeller, still the GTX SC size wear ring...

    i am getting 63 mph and 7100 rpm.
    i know i should be tuned to 7600 rpm, i can either bend the impeller, or get more HP...
    if i get my SCer rebuilt to 08 specs, and get a greenwheel also, what else do i need to do to the engine to make it run, upgrade injectors?RRFPR upgrade fuel pump?? anything??
    i want one last simple upgrade to make more power, but i dont want to have to deal with a cascade of other parts upgrades...
    anything simple i can do to get my impeller spinning up to 7600?
    500 RPM's is a lot of tweeking, send it back to whom ever you bought it from and have it re-pitched to make up your missing 500RPM.. Having your prop repitched professionally will be better in the long run

  3. #3
    cdalesch's Avatar
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    Quote Originally Posted by Alex13 View Post
    500 RPM's is a lot of tweeking, send it back to whom ever you bought it from and have it re-pitched to make up your missing 500RPM.. Having your prop repitched professionally will be better in the long run
    Amen...its the pitch in the prop. I had the same problem....got a local jetski shop to research my issue and resolved it by putting in the correct pitch impeller....and whoola...instant 800 rpms...and instant 5mph!

  4. #4
    lextoy's Avatar
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    ttt,cmon guys, can i just put a greenwheel in my sc, and do nothing else?
    i know with cast engine parts i am limited...

  5. #5
    JFizzleJR's Avatar
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    I believe you'll have to upgrade to the RXP 58 psi fuel pressure regulator. Maybe someone has one laying around after installing the RRFPR..

  6. #6
    Site Admin Green Hulk's Avatar
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    Lex, i think you will be perfectly fine with the green charger and stock injectors and your modifications. No regulator needed. The GTX SC supercharger has a 17 tooth gear and doesn't spin to the same boost levels a RXP/T would.

  7. #7
    lextoy's Avatar
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    jerry, thats what i wanted to hear

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