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  1. #1

    pvc free flow problem

    well, i went out today after installing some mods and idled for about 15 20 mins and did some 1/2 3/4 runs no full throttle however when i punched it ski ran well i'd say for about 30 secs. and then it just bogged down looked in and the pvc pipe was melted have no idea what caused it here are a list of my internal mods

    jetworks (fercho)
    d plate
    aftermarket heads
    free flow
    r & d air filter
    pro tech reed stuffers


    now i havent tuned the jetworks valve properly could that have caused my probelm not getting enough water back there and caused those temperatures i dont know how to tune the jetworks valve..well any help is appreciated


    David


  2. #2
    spud's Avatar
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    I'd check the Jetworks valve and all the lines for obstructions. Also If it is the adjustable Jetworks you really can't have it too tight unless you have a bunch of washers in there. I have the metal sound suppression removal tube. I have read where you have to remove the sound suppression before you can add the Jetworks mod. The PVC probably has a low melt point like the sound suppression box. How do the exhaust hoses look?

    If they are good then just replace the PVC with metal, check valve, hoses, assemble and ride.

  3. #3

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    Titi, Spud is right on on this one, the first free-flows were ordinary looking rubber, but now you will see that they are hi-temp silicone, so even without the jet works mod, but with stingers, there must have been a problem. REXA.

  4. #4
    Hydrotoys's Avatar
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    Quite possible that the jetworks was never opening, or even in backwards.
    Make sure the flow is in the direction with the arrow.


    poor mans tune:
    -Leave on trailer tied down, front and rear.
    -Run a piece of hose off the "Output" side of the jetworks.
    -If Jetworks valve is blue, just twist it until water flows at above idle.
    -Increase rpms to 2500 and twist it until water just comes out.
    -Take off extension hose and hook up normally.
    -Go test it out.

    If your jetworks is red, you must disassemble after every test and add washers to increase rpm opening setting, or delete washers to decrease rpm opening setting.

  5. #5
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Mark, you set the jetworks, blue one to 2500 rpms? I thought it was 3500 rpms?
    SHOOTER

  6. #6
    Hydrotoys's Avatar
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    Shooter,
    just like you, it depends on which ski I'm working on, does it have gas valves, or any power valves, and what is the hole shot like.

    Sometimes you set it lower, you can better control the launch.

  7. #7
    spud- exhaust hoses are fine just pvc melting, im pretty sure it was my jetworks i just assembled it like in the diagram and dont know really how to tune it but mark helped me out on this one thanks buddy..where can i find some of that rubber piece that comes from the waterbox to the ff? thanks


    David

  8. #8
    Hydrotoys's Avatar
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    Riva sells a one-piece FFlow that is silicone. It's expensive, but it won't melt faster than your other rubber pieces.

  9. #9
    spud's Avatar
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    What Mark suggested is probably the best route to take. I would end up buying a new hose from Riva If I could'nt find anything in the plumbing section of Home Depot.

  10. #10
    jgustman's Avatar
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    I just about melted mine, but smelled burning rubber on the 1st run across the lake after getting it out of storage for the winter. My jetworks valve must have had water in it and froze, pushed the ball inside the valve out the inlet side of the valve, blocked the line very well...I caught it just in time and no damage was done.

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