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  1. #1

    1200-65u Triple Pipe Jetting Help

    I have this "problem" I stuffed a 65u with triple pipes into a WBII. At this point I have not had to cut the hull to get it all to fit, but I may in one spot as the middle pipe touches a bit. It is quite the jigsaw puzzle to get it all together. Here are some in progress pics. I really need some advise on jetting. I know I will have to tune, but a rich starting point would be greatly appreciated.
    Setup:

    Riva Endurance ported 92 Octane cylinder
    .75 over bores with Pro X pistons
    Riva girdled head with 41cc domes
    Riva FA and Adapters, primer, choke plates removed with otherwise Stock Carbs
    Riva CDI
    Fluid Balancer
    Factory Pipe Triples
    High Drag WBII Hull Starting with a solas concord 12/18

    Thanks
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  2. #2
    RAIDER RUNNER BULLRAIDER's Avatar
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    WOW that is cool ,.................

  3. #3
    ....back from the dead.... J-ME's Avatar
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    Good Lord !

    That IS gonna be a fun ride.

    Give dav_dman or pistonwash a day or 2, they will be able to hook you up.

  4. #4
    Pistonwash's Avatar
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    Start off with a 145 main, 120 pilot, 2.0 N/S and 95 gr. spring.

    That should be close to what you need. Jet up or down the main jet if you need more/less fuel.

  5. #5
    PW, Thank you very much! I am atleast a month out, but it wouldn't matter as it has rained for 37 days straight here on the coast of washington.....29" of rain in the month of January oh and its been about 45 degrees out ... . As I had to make a custom exhaust from the waterbox back, does anyone know what the average exhaust temp is? Go Seahawks!

    Again thanks for the help.

  6. #6
    RAIDER RUNNER BULLRAIDER's Avatar
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    Did you not have to cut the pipes at all????

  7. #7
    Hydrotoys's Avatar
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    That's my kind of project!!!

    Excellent!

  8. #8
    No pipe cutting except for the accumulator where the front 2 pipes and the rear pipe dump into the waterbox. On the "accumulator" for the rear pipe I had to section 2" out of it to lower it and add a 22 degree bend in addition to the existing bend. I also had to remove the mount off of the rear pipe, to be relocated to a new spot TBD. If you can't tell the most time and work is still being spent in the smallest part of the boat. Here is a few more shots. When I finally get done with all the fab work, I'll shoot a low rez video because you wouldn't believe the order and how all of it has to go together.
    In pic xxx85, I am pretty sure that I have to cut the bulge on the top right out and make flush with the rest of the boat. There is a little "stealth" play here as the seat covers this area and actually will allow for a little tweaking. Exhaust is a Raider 1100 output into the pump cavity. Also a shot of the filled and machined motor mount holes. I was not comfortable with the coupler gap that I got by simply cutting the intermediate shaft as short as possible.
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  9. #9
    Flying Scotsman's Avatar
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    Looks like fun.
    I know its hard enough on a 1200 this is a real challenge.

    Keep up the good work.

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