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  1. #1
    isa alnoaimi's Avatar
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    what prop pitch do i need ? stage 3

    hi
    im posting here to know what prop pitch i need , cause till now i tried two props and still didnt get my target RPM wich is 8500

    my parts :
    E1 wheel
    R3 reflash limiter is 8880 rpm
    riva air intake
    riva ride plate & grate
    riva thru exhaust & water box
    riva FPR & Aeromotive's 340 fuel pump
    riva 12 vein pump & 160mm liner

    ok so first i tried a 12/22 prop 160mm
    my rpm was 7500 , with 85 and 86 ring

    then i tried a 12/18 prop now my RPM is 7800-7900
    so i dropped 4 deg and i gained almost 300-400 rpm

    also im a sea rider and our weather is extremly hot !!!

    someone in the form told me its not good to dropp more than 6 deg from the main pitch
    i didnt understad him on this
    please advices is needed cause i wasted a lot of $$$ on props which finally they will be thrown in my store


  2. #2
    for rpms that high in the heat with that kind of pump set up you need a different wheel.an et 15.5 with 13/16 or et 18 with 13/18 either should have your 8300-8600rpm in the heat with 85mm nozzle 160mm pump
    Last edited by FXSlowKroozer; 06-22-2013 at 03:41 PM.

  3. #3
    isa alnoaimi's Avatar
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    Quote Originally Posted by hialeahchiko305 View Post
    for rpms that high in the heat with that kind of pump set up you need a different wheel.an et 15.5 with 13/16 or et 18 with 13/18 either should have your 8300-8600rpm in the heat with 85mm nozzle
    you know before this pump set up
    i was using the stock pump and prop and nozzle
    my rpm's was 8700 , and my top speed was 83 gps
    then i tried the 15/23 prop 160mm
    my rpm dropped to 7000
    i tried also 13/24 prop 155mm it dropped my rpm's from 8700 to 8100
    and i lost my top end
    and the cavitation was horrible !!!
    thats why i got the riva 12 vein pump

    i also dont want to change my wheel, cause the clutch is not lasting with me

  4. #4
    is this a recreational ski or a closed course ski ? because you shouldnt need all of that to stay hooked up with a wheel like a e1 on a recreational ski.a buddy of mine is only seeing like 16psi 8900rpm in the heat with his e1 and he has good holeshot with 155mm skat prop stock pump 85mph.

  5. #5
    isa alnoaimi's Avatar
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    its a recreational ski , but i want it to be perfect cause i might race in it

    my holeshot is ridicules , astocker would pass me on lunch if im on the stock pump !!!
    cavitation is killing me !!!

  6. #6
    isa alnoaimi's Avatar
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    ill show you my stock pump now
    so just you can see what cavitation has done to my pump

  7. #7
    yeah well you have to make a compromise because that wheel isnt enough power to do what you want to do with it.try a 155mm 13/22 skat with the stock or riva pump 83mm nozzle

  8. #8
    isa alnoaimi's Avatar
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    i have the riva pump

    Click image for larger version. 

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    Last edited by isa alnoaimi; 06-22-2013 at 04:13 PM.

  9. #9
    isa alnoaimi's Avatar
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    this what cavitation did to my pump

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  10. #10
    tuningforks's Avatar
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    Are you running an aftermarket intercooler? If it's very hot there, that might bring your rpm's up.

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