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  1. #1
    skigolfnut's Avatar
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    Trying to Raise RPM?

    I have a 06 RXP with the ET-137 wheel intercooler relocation set up over the old resonator, 80 lb injectors torx racing 9000 ecu-rear air, RRFPR-AFR gauge opas block offs,

    I have the stock nozzle for now had the impeller repitched and trued to 13 -18.5 to raise my rpms,

    AFR gauge was reading 11.2--12.5

    test run last Tuesday is 8300 rpms with only 74.5 mph
    any ideas to raise the rpms?


  2. #2

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    Try a new ecu-- I had problems with my "Torx" ecu tune-- 200 rpm down from a stocker (advertised as good for an additional 200 rpm over the stocker).

  3. #3
    skigolfnut's Avatar
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    I have a rotax racing ecu I could plug in and see,

  4. #4
    Sturm215's Avatar
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    Afr 11.2-12.5 wot? ?

  5. #5
    AtoMIC_OraNGE greenbullet's Avatar
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    If your 11.2 wot that's why Your rich

  6. #6
    JT jpt7779's Avatar
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    As others have noted 11.2 at wot is way too fat. 11.8 to 12.0 is much better at high rpm (8700-8900). If your monitoring system is that erratic I'd find something much more accurate.

    Additionally, when was the last time you check your SC slip?

    You are correct that something is amiss!

  7. #7
    Got Boost? psycho rxp's Avatar
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    You'll need to go with a smaller prop to get the RPM's up. That will enable u to turn 9K. RPM's =mph.

    With a turbo, u could just up the boost some, With a SC u need to get the right prop for your RPMS.

  8. #8
    skigolfnut's Avatar
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    I dialed my afr to 12.2 at WOT
    and I was able to get 8350 rpms with water temp at 71*f
    my prop was professionally done at 13/18.5 pitch
    compression was 125-pto 135 center 130 mag
    plugs were a little old,

    I was going to check the intake manifold for leaks and the hoses for boost leaks
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  9. #9
    That seems crazy low For a 137 . Install a boost gauge . My fresh et 137 made 14.8psi at 8350

  10. #10
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by skigolfnut View Post
    I dialed my afr to 12.2 at WOT
    and I was able to get 8350 rpms with water temp at 71*f
    my prop was professionally done at 13/18.5 pitch
    compression was 125-pto 135 center 130 mag
    plugs were a little old,

    I was going to check the intake manifold for leaks and the hoses for boost leaks
    Is the ecu actually programmed for 80# injectors? Torx ecu, right? That may be the problem.....

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