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  1. #11
    I dream skis MTRHEAD's Avatar
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    Re: Yamaha pipe question?

    [QUOTE=I would say a FFP hits a little harder on bottom, but Pro-tec hits hardder in mid/top.[/QUOTE]

    spot on

  2. #12
    Top Dog Benflynn's Avatar
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    Re: Yamaha pipe question?

    Ss protec hits instantly, can't see it hitting any sooner, 61x with slight ex porting

  3. #13
    Top Dog Benflynn's Avatar
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    Re: Yamaha pipe question?

    When we say it hits sooner, how many rpm sooner are we thinking? Ss protec on 701 was enough for me to never touch my kawi again, prob put its sp in the x2

  4. #14
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Yamaha pipe question?

    Mtrhead, I recall a different cone layout on the Riva Pipe, was there an
    earlier version?

    Anybody? How did the Riva pipe compare to the others?

    Quote Originally Posted by Benflynn View Post
    Ss protec hits instantly, can't see it hitting any sooner, 61x with slight ex porting
    Quote Originally Posted by driftmaster View Post
    I would say a FFP hits a little harder on bottom, but Pro-tec hits hardder in mid/top.
    Was your experiences on cylinders with more porting than a 61x?


    Bill M.
    Last edited by wmazz; 06-30-2017 at 04:19 PM.
    Horsepower == Speed, RPM != Speed



  5. #15
    PWCToday Guru TaintlessEd's Avatar
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    Re: Yamaha pipe question?

    Quote Originally Posted by wmazz View Post
    I would also like to hear opinions about all the popular Yamaha pipes.
    complete list of pipes for the superjet

    https://r.tapatalk.com/shareLink?sha...F&share_type=t

    I hope this helps


    Sent from my iPhone using Tapatalk

  6. #16
    PWCToday.com Is My Home Away From Home
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    Re: Yamaha pipe question?

    Quote Originally Posted by wmazz View Post
    Was your experiences on cylinders with more porting than a 61x?


    Bill M.

    No porting.

  7. #17
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Yamaha pipe question?

    Quote Originally Posted by TaintlessEd View Post
    complete list of pipes for the superjet

    https://r.tapatalk.com/shareLink?sha...F&share_type=t

    I hope this helps
    That is a long and helpful post.

    What do they mean by the pipe "Clogs easy"?

    They also talk about pipes that hit hard, a hard hit is just a steep section
    of a HP graph that was preceded by lost HP. It would be a better comparison
    to say which pipe has more top speed.

    Some pipes have better acceleration with little or no hit, and still make great
    peak HP.

    A question about the B-pipe: It looks like most people would run the same
    impeller in both, but I would expect the limited pipe on a cylinder with 186'
    exh port timing to make peak HP between 6750 to 6800 rpm.

    But the mod pipe should make peak HP near +7100 rpm, and I would want
    more than that. (I am assuming FPP kept the same length between the Kawi
    650 limited pipe and the Yamaha limited pipe.)

    ? Do racers or tuners normally use or recommend at least 1 pitch lower impeller
    on the mod pipe.




    Bill M.
    Horsepower == Speed, RPM != Speed



  8. #18
    PWCToday Guru TaintlessEd's Avatar
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    Re: Yamaha pipe question?

    Quote Originally Posted by wmazz View Post
    What do they mean by the pipe "Clogs easy"?
    The cooling passages on the pipe I think.



    Sent from my iPhone using Tapatalk

  9. #19
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Yamaha pipe question?

    Quote Originally Posted by wmazz View Post
    A question about the B-pipe: It looks like most people would run the same
    impeller in both, but I would expect the limited pipe on a cylinder with 186'
    exh port timing to make peak HP between 6750 to 6800 rpm.

    But the mod pipe should make peak HP near +7100 rpm, and I would want
    more than that. (I am assuming FPP kept the same length between the Kawi
    650 limited pipe and the Yamaha limited pipe.)

    ? Do racers or tuners normally use or recommend at least 1 pitch lower impeller
    on the mod pipe.
    I was thinking about this at lunch, and maybe with the larger diameter pump,
    they would need to make power at or near 6500 for the limited and 6800 for
    the mod?

    Either way, the mod should make its power 300 rpm higher than the limited.


    Quote Originally Posted by TaintlessEd View Post
    The cooling passages on the pipe I think.
    I can see why that would happen.


    BM.
    Last edited by wmazz; 06-30-2017 at 09:32 PM.
    Horsepower == Speed, RPM != Speed



  10. #20
    I dream skis MTRHEAD's Avatar
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    Re: Yamaha pipe question?

    Dry superjet pipes work best when spun 7600-7700 rpm.

    Riva red in picture was Superjet. They made an fx1 with a longer snout, waveblaster, wb2, and raider style. I know of 5 or 6 reds (cast pipes) .
    Last edited by MTRHEAD; 06-30-2017 at 11:09 PM.

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