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  1. #1


    Just put together a sbc in a street/strip car , now we have noticed the fuel pressure gauge bouncing. 950 demon carb with magnafuel prostar 500 pump with adjustable pressure and 2 port regulator. checked everything for dirt or sticking bits but still does it, anyone had this happen before, still haven't ruled out faulty gauge(new).

  2. #2
    Senior Member RACING JUNKIE mytmouz's Avatar
    Join Date
    May 2006
    Pelahatchie, MS
    If it's a liquid filled gauge, that's most likely the problem.
    If you think nobody cares, try missing a payment...

  3. #3
    It's an autometer but not liquid filled, i'll try a different gauge and see what happens.

  4. #4
    Senior Member DYNO TECH
    Join Date
    Feb 2004
    Leonard, Texas
    If it's not the guage, check for flow through the filter or obstructions at the fuel bung . I've seen pump cavitation (sucking air) cause this same scenario. Also how large are the inlet and oulet fuel lines. Never have a smaller inlet than outlet. Just my $.02
    'A government big enough to give you everything you want, is big enough to take away everything you have.'

    Thomas Jefferson

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