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Thread: olley black pump and holley 704 regulator

  1. #1
    Senior Member MASTER BUILDER
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    olley black pump and holley 704 regulator

    I put the above combo on my sbc. When the engine is running, the regulator does its job of limiting pressure to 6-7 lbs. However when the engine is off and the pump is on, it will not hold the pressure to 6-7 lbs but goes up to the max of the pump -14 lbs. This causes fuel to leak out of the carb. Somewhere I read that the black pump has an external bypass port. Not on mine. At least I can't find anything but in and out. The regulator has 2 output ports, 1 is plugged, the other goes to the fuel log. Should I unplug the plugged port and run it back to the fuel tank? I really don't want to buy another pump. Any help would be appreciated.

  2. #2
    Senior Member MASTER BUILDER
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    Holley not Olley. Anyway I have since learned that pressure creep is common.

  3. #3
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    Holy mollie Holly Molly, it's a HOLLEY Wally !

    :shock: :shock: :shock:
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  4. #4
    Senior Member RACING JUNKIE
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    i run two holley blue pumps and they hold firm at 7 pounds.... running or engine off
    GOOD PARTS AREN'T CHEAP AND CHEAP PARTS ARE NEVER GOOD.........
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  5. #5
    Senior Member RACING JUNKIE
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    I used to have this problem ,I had a bad reg
    I bought a pro systems reg from them and it did it from day one now I have the big holley reg problem fixed, I run the black pump and have no return back to cell, it holds 7.5 with motor on or off

  6. #6
    Senior Member RACING JUNKIE
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    Quote Originally Posted by jreiley
    Holley not Olley. Anyway I have since learned that pressure creep is common.
    Nothing common about pressure creep, regulator issue.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
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    Complete Drag Car Wiring
    APD Race Engines
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  7. #7
    Senior Member RACING JUNKIE
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    Quote Originally Posted by hammertime
    Quote Originally Posted by jreiley
    Holley not Olley. Anyway I have since learned that pressure creep is common.
    Nothing common about pressure creep, regulator issue.
    yes sir..... :wink: :wink:
    GOOD PARTS AREN'T CHEAP AND CHEAP PARTS ARE NEVER GOOD.........
    http://img.photobucket.com/albums/v2...lastscan-3.jpg


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