650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski - Page 31
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  1. #301
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Jul 2008
    Location
    Chicago / Portage, MI
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Thanks for the heads up. Actually I had a race spec Riva 650 cylinder a while ago which I was going to use. Sold it at some point. I think I'm going to have Newmiller port the cyl I have. Its a 00 00 (perfect sleeve to casting alignment) cyl. Kind of funny that cylinder ended up on a 650LX, the bottom of the bottom 650s. At any rate that cyl is a bit more special than usual. Of course after porting there wont be much benefit but still. It's special to me.

    I need to do some research to figure out what's a good target rpm for max hp between a good ported 650 cyl and the Coffmans sizzler pipe. I think I've reached the end of this combination of parts. I don't think it's practical to spin this ski any faster, and I'm not sure a larger impeller could pull this set up as well. A ported cylinder / full 2" exhaust and less restrictive waterbox, raised rev limit CDI, and 18/21 might be a good next combination.
    Last edited by theVetteman3; 09-09-2020 at 02:13 PM.
    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, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



  2. #302
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
    Join Date
    Jul 2008
    Location
    Chicago / Portage, MI
    Age
    38
    Posts
    3,586

    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    A few reference threads from X-H20:

    Coffman's vs Factory Pipe:
    http://www.x-h2o.com/threads/coffman-vs-b-pipe.66234/

    Coffmans Pipe Set Up and Tuning:
    http://www.x-h2o.com/threads/coffman...tuning.152119/
    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, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



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