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Thread: Fuel pressure?

  1. #31
    Official RnS Addict corvette's Avatar
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    8 is still too high, cant see a holley holding that pressure for too long,one i had didnt like 6 never mind that , regulate it down, and a gauge

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    Is it a gauge that. You can read from the seat whilst driving down the road or one of those decorations you can only read with the bonnet open..... You need to know the pressure whilst using throttle going down the road not at idle

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    Will the pressure go up or down as you increas fuel flow????.

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    Fuel pressure should be a constant but with the cheaper dead head regulators like the holleys fuel pressure at idle can raise slightly as its being pushed into a corner with no where to go. I use a return system with an aeromotive 13202 regulator boost related into my carb hat. The pressure sits at 6.5lbs at idle and rises as the boost does on a 1:1 scale.

    I'd recommend T'ing off somewhere and borrowing a gauge or buying one and fitting it so you can read it while the car is being used. Then when you have a setting that's correct relate that to the one at the carb.

    What pump are you using out of interest
    1955-56-57 Chevy new and used parts always available from www.randrhotrodimports.co.uk who I'm proud to have sponsor my '57 Chevy race car. 9.3 @ 155.8 mph / 0-60 = 1.47 seconds! Street legal :-)

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    Official RnS Addict bigyellataxi's Avatar
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    Quote Originally Posted by Adam Sayers View Post
    The pressure may be up because you have the gauge at the smaller bore stainless pipe work? Gauges should be just after or ideally on the regulator. The spec of the engine determines the volume (amount of fuel) the engine requires not the pressure. You can have 50 gallons per hour at 5 psi or 500 gph at 5psi. One will run lean and cook parts on a 300 hp engine the other will support 1,000bhp
    Bore size will not change pressure range.

    HTH??

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    The Camino Kid Britdragster's Avatar
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    Quote Originally Posted by zephyrc View Post
    Is it a gauge that. You can read from the seat whilst driving down the road or one of those decorations you can only read with the bonnet open..... You need to know the pressure whilst using throttle going down the road not at idle
    Hi. Yes, it is the type that is under the bonnet next to the carb.

  10. #38
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    Ok. Thx for the replies and appologies to the author of the original post for hijacking it. Ok, so as it stands I know I need a regulator to bring the pressure down some. What regulator would be recomended for essentially a street motor and what would be the best way to locate the fuel pressure guage in aplace where it can be observed and what type of tubing would be required. Thx, Rog.

  11. #39
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    Holley 803 is cheap and cheerful regulator. Use a temp gauge outside the windscreen. Never have fuel inside the car. Look up a fella on here called bigyellataxi. He does gauges and the lines. You will need low pressure as you will be only be interested in the very low range

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