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  1. #1

    Should I just be proactive?

    08 RXTx with 68-140 supercharger and tune with 9200 redline. Right now I am sitting at 86xx rpms with a 15/20 impeller. Installing Fizzle 1000, Eastside Powersports camshaft (springs and retainers already installed), Dynojet commander with autotune, and gutting waterbox (also going open loop and as long as everything off replacing flywheel bolts).

    So from what I have read on results the Fizzle and camshaft should add 400-600 rpms (and maybe few more once afrs are set properly) if my results are like others here. So should I also install a 15/21 impeller now? Otherwise I will be at or just below my limit. Thoughts? Thanks


  2. #2
    justforfun's Avatar
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    Why not give the prop you have a shot then pitch if needed or change ring in the nozzle. I can say with all the props I bought I'm prop poor. LOL

  3. #3
    I dont have an adjustable nozzle and I already have a 15/21 in perfect shape.

  4. #4
    justforfun's Avatar
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    That makes things easy without spending more money. I think most my RPM gain came from the camshaft but I was already running the Fizzle 1000

  5. #5
    kimi's Avatar
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    Do you want make higher your rpm?

  6. #6
    Sanfish's Avatar
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    The cam does add the most RPM compared to any other bolt on mod. While I would probably try it with the 15/20 (like jutforfun said), you will end up putting in the 15/21 because you will be between 9000-9100 when all mentioned mods are installed. If you ride flatwater, that should be fine with the 9200 limiter...but you will want more wiggle room if riding chop/ocean.

    FYI: I can turn 9250rpm with a 15/19R

  7. #7
    I'm in Tampa so ride rougher water most of the time in the Gulf. Think I am going to install the 15/21 since I have the pump off anyway. I just think 1-200 rpm at best case under limiter in waves is too close.

  8. #8
    kimi's Avatar
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    Quote Originally Posted by viperbob View Post
    I'm in Tampa so ride rougher water most of the time in the Gulf. Think I am going to install the 15/21 since I have the pump off anyway. I just think 1-200 rpm at best case under limiter in waves is too close.
    15/21? I don't think so, this pitch it's to hard for you, you need 15/19R just only my opinion. I use 15/20R in my race jet ski.

  9. #9
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by viperbob View Post
    08 RXTx with 68-140 supercharger and tune with 9200 redline. Right now I am sitting at 86xx rpms with a 15/20 impeller. Installing Fizzle 1000, Eastside Powersports camshaft (springs and retainers already installed), Dynojet commander with autotune, and gutting waterbox (also going open loop and as long as everything off replacing flywheel bolts).

    So from what I have read on results the Fizzle and camshaft should add 400-600 rpms (and maybe few more once afrs are set properly) if my results are like others here. So should I also install a 15/21 impeller now? Otherwise I will be at or just below my limit. Thoughts? Thanks
    Stock valves?

  10. #10

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    Wow you run stock fly wheel bolts with the 70-140ET @ 9200 rpms?

    How long have you run it like this?

    I guess some bolts hold and some don't?

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