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  1. #1
    Moderator The Bandit's Avatar
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    Vortec impeller gains?

    Hey, what gains would I expect to see from installing a vortec S/C impeller on a Riva stage 1 RXP? thanks in advance....Steve


  2. #2
    V-Tec, 4-Tech that's how I roll meirvin's Avatar
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    I dont know about just the impeller but the impeller and Intercooler along with the correct prop for those additions (15/20) took me from 68.7 to 73.5
    .2 shy of 5 Mph for just a few bolt ons.

    When thinking about impellers it is very important that you are maxamizing your RPMs so that your getting all the boost you can so if your not turning 8100 rpms you did to correct that too

    My.2 worth

  3. #3
    Quote Originally Posted by RXP Steve
    Hey, what gains would I expect to see from installing a vortec S/C impeller on a Riva stage 1 RXP? thanks in advance....Steve
    Better holeshot and acceleration. Top end nada.

  4. #4
    Moderator The Bandit's Avatar
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    meirvin,
    Im at 73 with a stage 1 .
    RXP kid...thanks

  5. #5

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    The Rotax Racing SC impeller will give you more boost.
    Green Hulk has them.

  6. #6
    Quote Originally Posted by sundance
    The Rotax Racing SC impeller will give you more boost.
    Green Hulk has them.
    But I don't think you can run it with the stock injectors. I think you at least have to run the 42# injectors.

    Can you run it with the stock ECU?

  7. #7
    twisted shaft's Avatar
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    sc

    Quote Originally Posted by RXPkid View Post
    But I don't think you can run it with the stock injectors. I think you at least have to run the 42# injectors.

    Can you run it with the stock ECU?
    yes,yes ,i ra mine on stock injectors

  8. #8
    Quote Originally Posted by twisted shaft View Post
    yes,yes ,i ra mine on stock injectors
    You still running the stock intake and IC then? I hope so. What's your AFR?

  9. #9
    JFizzleJR's Avatar
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    1 year later RXP steve is at 81+ and is starting a GPRXP, and RXP kid STILL knows that stock injectors aren't enough with the rotax s/c, greenwheel, or les cooke a-kit and external intercooler

  10. #10
    Quote Originally Posted by JFizzleJR View Post
    RXP kid now knows that stock injectors are okay with the s2 s/c and external intercooler
    Yup, I'm running that right now...but not the Rotax Racing or Green Wheel with stock injectors on a 3" intake and external IC.

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