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Thread: fuel pump

  1. #1
    RC Enthusiast
    Join Date
    Nov 2010
    Posts
    26

    fuel pump

    just throwing it out there , but is there a need to fit a pump , if it were possible , to stabilize fuel delivery relying on vacuum seems a bit hit and miss and maybe responsible for a lot of tuning issues that newbies seem to have . Just a question !!

  2. #2
    RC Qualifier
    Join Date
    Jan 2013
    Location
    Gurley, Alabama
    Posts
    765
    The biggest problem with using a pump to pressurize the fuel system is fuel pressure regulation. When using a carb that doesn't have a bowl and float, it's completely up to the fuel delivery system to regulate the fuel flow to the engine. Using the exhaust to do this is genius. The exhaust makes the perfect amount of pressure at every rpm to deliver the perfect amount of fuel at every rpm. It pumps just a little more fuel than the engine needs and we meter that with the carb needles.

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