750SX jetting and impeller advice - Page 2
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  1. #11
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: 750SX jetting and impeller advice

    I see now where you posted that previously, duhh!

    Don't have to tell me 10 times, 8 or 9 will usually do it...



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  2. #12
    PWCToday.com Is My Home Away From Home bandit88's Avatar
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    Re: 750SX jetting and impeller advice

    My money is still on the impeller.. That pipe wants high RPM and a big single carb isnt going to help with intake signal. Lower the pitch or bore the nozzle and let that motor get into the power. Or better yet, get a Skat 9/17 or a Concord 11/16. Those straight edge Solas' are pigs.
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  3. #13
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Re: 750SX jetting and impeller advice

    Yep agreed on Solas. The only one I would ever use is the dynafly on 1100 builds or perhaps my 550/800 next time around. Beyond that Skats, in particular swirls, C75 big hub swirls, and Impros Hookers, are vastly better. Much better low end in particular.

    With those mods we have seen good results with 8/16 or 9/17 c75s. The 8/16 C75 is definitely a low end impeller. 9/17 straight or 9/17 c75 would be good all around impellers. 10/18 would probably also work. As mentioned get a couple of nozzle sizes so you can quickly change.

    Also if it was me, I would switch to dual oem carbs.
    Last edited by theVetteman3; 07-10-2019 at 07:06 AM.
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake [45.8mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, cheater pipe [47.8mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    [TBD]



  4. #14
    PWCToday Guru 64coupe's Avatar
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    Re: 750SX jetting and impeller advice

    Thank you everyone on the advise. I will try my luck posting a wanted ad. I really feel the impeller is loading the engine too much.

    Quote Originally Posted by theVetteman3 View Post
    Yep agreed on Solas. The only one I would ever use is the dynafly on 1100 builds or perhaps my 550/800 next time around. Beyond that Skats, in particular swirls, C75 big hub swirls, and Impros Hookers, are vastly better. Much better low end in particular.

    With those mods we have seen good results with 8/16 or 9/17 c75s. The 8/16 C75 is definitely a low end impeller. 9/17 straight or 9/17 c75 would be good all around impellers. 10/18 would probably also work. As mentioned get a couple of nozzle sizes so you can quickly change.

    Also if it was me, I would switch to dual oem carbs.
    I would like more low end grunt but an all around impeller would do with my mods. I will see what comes up and thank you for sharing your experiences.

  5. #15
    PWCToday Guru 64coupe's Avatar
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    Re: 750SX jetting and impeller advice

    Update with 2.0 n/s and black spring. My gauge is showing 16-17 psi pop off.

    The ski ran way better and I felt the engine trying to wind out more, then the rubber coupling on the pipe tore about an inch and I had to ride the ski back in with the engine cover under my arm. At the ramp I ran it without the cover and made a couple passes and the exhaust coupling got worse, had to call it quits but it felt a lot better!

    I ordered a coupling and still looking for an impeller.

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