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  1. #1

    Question 1994 SL 750 Pentigon Fuel Pump & Fuel Restrictor Size?

    I installed a new Pentigon Fuel Pump in my ski, do I need to change my fuel restrictor because of the larger flow rate of the pump?

    1) If so what size jet would you recommend?
    2) What should the return line pressure read?

    Thanks,
    Joey


  2. #2
    ph2ocraft's Avatar
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    Joey, you want 4-6 pounds in the system at WOT.
    I'd ask crazya if he'll sell you an inline restictor in which you can change the jet size until you get the desired pressure needed.

  3. #3

    Smile

    Thanks for the info.... What is WOT?

    About 6 months ago you were helping me with a RPM issue, couldn't get past 3000 rpms. I rebuilt the carbs bought a pentigon pump, still couldn't figure it out so I gave up. So I just let it sit for 6 month, I just recently started looking at it again, just for the heck of it I took apart the new pentigon fuel pump and found a ton of tiny dead ants. I'm assuming that caused my problem.

    I'm in the process of cleaning out my carbs, I was thinking of changing the following:
    1) High Jet for #90 to #102.5 (heard that polars had a update), because it has a vortex air cleaner, what do think?

    Thanks Joey

  4. #4
    seaobin's Avatar
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    Wide open throttle

  5. #5
    seaobin's Avatar
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    Joey,

    I have a 750 that I have .5 over on the pistons and I am running premix, and just rejetted to 95's on high and 80's on low.

    Tony and I are going out in teh am to test and tune, I will let you know how it turns out. I will defer, but a jump to 102's might be too much


    Sean

  6. #6
    ph2ocraft's Avatar
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    I agree. get it running and find your RPM's first. Yeah, ants or any restriction will cause a fuel supply problem, be sure to check it all.

  7. #7
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    I got wood ants on my 38 ft wood hull Colonial one summer,Detroyed my FlyBridge,Had to rebuild it. Damn ants

  8. #8
    Sean,
    How was your test run?

    How is your carb set up (jet size, needle & seat, pop-off pressure, running a pentigon fuel pump, fuel restrictor size, & needle settings)?

    Joey

  9. #9
    seaobin's Avatar
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    The beast seems to be running great. 6150 ish RPM and 52 MPH on the dream-o-meter. and a lot more power off the line

    Awaiting wash results from some of the more experienced folks here. I tthink the 95's are the right size for me as I had to bring in the screws from the 1 1/2 starting point to get max rpms.

    POP OFF springs are stock
    Fuel restrictor is stock
    Mikuni triple HF pump
    stock flame arrestor

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