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Thread: What pitch??

  1. #1
    carbuff91's Avatar
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    What pitch??

    Hey all,

    What pitch would I be looking for when my boat (basically has a riva stage 2 kit) is turning around 7,060-7,080 range with a 13/19 setback Solas on the old style pump?

    I'm still trying to understand the whole variable pitch impeller thing.

    Thanks,
    Steve


  2. #2
    You're in the right rpm range now, what are you looking to do switch to the 05' pump?

  3. #3
    carbuff91's Avatar
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    VOODOO,

    I have a 05 pump...but, it has a SCAT 15/21 prop...it's to much for my current mods. I'm either going to sell it and buy a new 14/20 or send it to Speedfreaks or Impros and have it repitched. What to you think my RPM's would be at with the 14/20 on the 05 pump? I want to make sure they stay above 7000.

    Thanks,
    Steve

  4. #4
    Not sure, you may be ok? Talk to a prop guru like Carl.

  5. #5
    ABBOTT's Avatar
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    i would venture to say that you need to be looking for 7150-7200. You could have that scat prop depitched to a true 14/21 (from a 15/21 like you have now). You probably wouldn't need much because your rpms are really close to target--but just a hair shy.

    I guess it's better to have a little more than a little less. Just my 2 cents.

  6. #6
    carbuff91's Avatar
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    John,

    So, you think if it gets pitched to 14/21 my rpms will come up some to around 7,150 or so? Once I get my prop removal tool from Riva..it's going to come off and get sent off to impros or speedfreaks for repitch. I want to do this once if I can and get my rpms where they should be.

    Cya,
    Steve

    P.S. I'm still working on the banner for MB-3....

  7. #7
    ABBOTT's Avatar
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    Quote Originally Posted by carbuff91
    John,

    So, you think if it gets pitched to 14/21 my rpms will come up some to around 7,150 or so? Once I get my prop removal tool from Riva..it's going to come off and get sent off to impros or speedfreaks for repitch. I want to do this once if I can and get my rpms where they should be.

    Cya,
    Steve

    P.S. I'm still working on the banner for MB-3....
    It's possible, but then again there could be other things going on with that ski of yours that is unknown. The pitch is just a guess, and is probably worth a shot. I hope that it works out.

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