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  1. #1
    cfgp927's Avatar
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    Never satisfied....

    I've never been completely satisfied with the fitment of the twin pipes in my carbon GP.....so I'm fabricating a new exhaust manifold that will enable me to run a Neptune exhaust originally run on a SS XP. The pipe is the prototype that Neptune finally decided to build their production pipes from. While I was in the process of dismantling the boat to remove the twin pipes I decided to clean up the wiring and waterline routing as well. I may give up a few hp by running the single pipe, but I won't have to worry about the twins rubbing a hole in my hull. Here's a few pics I snapped of the pipe laying in the hull in approximately it's final mounting position. I'll post a few pics of the exhaust manifold when it's completed. Enjoy the pics and don't be afraid to post comments good or bad. The wiring in the back of hull is not yet finished....sorry it's so messy.
    Mike
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  2. #2
    cfgp927's Avatar
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    New fuel lines and pulse lines as well......also going to have a buddy airbrush my registration numbers on as well as a new M-line seat cover.....the list goes on and on. I'll try to post some more pics later.
    Mike

  3. #3
    Flying Scotsman's Avatar
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    should be interesting to compare speed and rpm nice looking piece.

  4. #4
    cfgp927's Avatar
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    If the pipe does what it was designed to do (give 18-20hp and 500-550rpm, on a sea-doo 785) I shouldn't miss a beat. The factory pipe twins were good for 20-22hp and 550+ rpm ( I bumped 8000 rpms on a couple of runs with a 165psi 80mm pump gas set-up and a Concorde 14/20). The speedwerx pipes seemed to make a little more power, but never confirmed it on the dyno, just seat of the pants. The 87mm motor doesn't like so many rpms and makes a ton more torque. I've been running a 16/23 around 7550rpms and am going to try a 17/24 after I get the jetting dialed in. The pipe wasn't so nice when I picked it up......see pic. I may try a factory pipe spec 2 pipe if I can pick one up fairly cheap.....also want to try a coffman 951 pipe as well. Since the exhaust manifold will have a seadoo flange on the exit end, it opens up a whole bunch of possibilities for pipes.
    Mike
    I also included a couple pics of a stamped production Neptune pipe.
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  5. #5
    cfgp927's Avatar
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    Here's a pic of the boat with the old seat cover on it and stripped of any decals (awaiting a trip to the paint booth for airbrushing). Also a pic of the new M-line seat cover (not a very good pic). And a few of the A-P design mats I'm thinking of installing (thanks J-Me).....I'm tired of the Hydro-turf and the boat originally had A-P mats on it when it was raced.
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  6. #6
    ....back from the dead.... J-ME's Avatar
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    WOW!


    Man that's a thing a beauty

  7. #7
    bainer1290's Avatar
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    That's a nice looking ski

  8. #8
    cfgp927's Avatar
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    I wish my wife thought of it that way.....sometimes I think she's jealous of all those sexy curves the boat has......

    Thanks, it's been a labor of love, time, money, heart ache, etc....But boy you should see the faces of the guys who just got spanked by an "800". That makes all the late nights and sometimes days worth it.
    Mike

    I wish my hard drive hadn't crashed before I got all my build pics on a CD....lots and lots of pics gone forever.....she's come along way...my black and blue mistress.

    Here's how she started.....
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  9. #9
    DAGO RACING CREW 97GPSLEEPER's Avatar
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    Beautiful ski, there is something about those GP lines, simple, yet eye catching. Long live the GP.

  10. #10
    superramjet's Avatar
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    cf gp

    I love it. You've really built a nice boat there. I've been battling a single pipe on a 66e motor for years, i cant wait to see what you come up with. I've got to get back to work on mine, as soon as work lets up I'll get after it again

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