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  1. #1
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    What prop should try next

    I have a 2005 rxp
    et 137+4
    50psi injectors
    external ic
    riva straight pipe exhaust straight out
    riva block off opas
    rrfpr
    supertech valve train
    Vtech tune to 8375
    solas 15/20r


    I hit 75mph at 8325. Is that as close as I'm going to get or can I get another pitch to maybe get closer or get there faster then I am ? An does 75 sound right or should I be faster


  2. #2
    boost junkie skidoochris's Avatar
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    stock timing is a joke over 7psi
    I bet its holding you back

  3. #3
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    Really ? I'm only 2 years into messing with these 4 strokes but I feel my setup should be over 75

  4. #4
    Vern's Avatar
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    75 is about all you will get at that rpm with your setup. Springs & retainers and then a higher rev limit & injectors will allow you to get to 80 mph range. You need to run 8600+ rpm to get to 80+ with your setup.

  5. #5
    AtoMIC_OraNGE greenbullet's Avatar
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    Quote Originally Posted by Vern View Post
    75 is about all you will get at that rpm with your setup. Springs & retainers and then a higher rev limit & injectors will allow you to get to 80 mph range. You need to run 8600+ rpm to get to 80+ with your setup.
    this is true

  6. #6
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    I have springs an retainers

  7. #7
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    I have super tech valve springs an retainers. Do u think I should get a higher rpm tune and 60psi injectors ?

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