Fuel pressure setting
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Fuel pressure setting

  1. #1
    Senior Member 69 wriedt devil's Avatar
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    Default Fuel pressure setting

    Ok I am running a BBC 427 with a 6-71 blower, and 2 750 CFM Holley carbs. The boat has never had a fuel pressure guage since i've had it, so I installed a liquid filled holley guage. At idle,( 1100 RPM) it reads 6 psi. Can someone tell me what it should be. i have been told between 7-9 psi is good. Just need some advice before i tweek it. thanks,

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  3. #2
    Blown, OHBA Member Wild Hair's Avatar
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    I have mine set at 8 psi, also running an 871 and two 750s. My system is set up on a loop instead of a return line, it loops through an enderal bypass regulator and back into the the flow, down stream of the pump. Gives me plenty of volume and steady pressure.
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  4. #3
    Senior Member 69 wriedt devil's Avatar
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    ok cool, i dont have a return line. will that matter?

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    Senior Member 69 wriedt devil's Avatar
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    well anyways i bumped it up to 8psi seems to idle smoother and surge a little less.

  7. #5
    Blown, OHBA Member Wild Hair's Avatar
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    Quote Originally Posted by 69 wriedt flattie View Post
    ok cool, i dont have a return line. will that matter?
    I would keep an eye on the pressure at WOT if it drops I would look into at least a loop. It is easier on the pump also.
    OHBA GROWTH THROUGH PARTICIPATION
    Built Cheyenne Tuff, With Chevy Stuff.
    well the block is GM any ways


    GOD BLESS AMERICA AND KEEP HER SAFE

    LOCK N LOAD AMERICA, OUR 2nd AMENDMENT
    IS UNDER FIRE


  8. #6
    Senior Member 69 wriedt devil's Avatar
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    ok will do, thanks!

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