Fuel Pressure?
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Fuel Pressure?

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    Default Fuel Pressure?

    Im installing a new Holley Blue fuel pump setup on my boat. Im questioning what pressure i should run?? Im running a chevy 454 bored .60 over small dome pistons about 10:1 compression stock heads Victor intake single holley 750. Any help would be appreciated..

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    8 PSI When floored.

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    Quote Originally Posted by Turtle View Post
    8 PSI When floored.

    Thank you!!

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    X2- Good Luck RACERICK

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    Quote Originally Posted by racerick784 View Post
    X2- Good Luck RACERICK
    how do i adjust it to 8psi at full throttle or is it just a constant 8psi even when idleing

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    You need a pressure guage and a fuel pressure regulator. Those pumps don't like to be stored for long periods with 10% ethenol fuel. It leaves some nasty stuff clogging the screen, eats up the impeller veins and just general damage. I've had mine for 7-8 years and it's time is about up. I couldn't really ask it for more considering the abuse I gave it. Had I taken care of it it would last many more years.
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    Holley recommends 7 PSI at idle and min. 4 PSI at WOT. I prefer to be running at 7 PSI thru the full RPM range.

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    Quote Originally Posted by Ol Blue View Post
    Holley recommends 7 PSI at idle and min. 4 PSI at WOT. I prefer to be running at 7 PSI thru the full RPM range.
    how do u get 7psi throughout the whole rpm range ?

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    I get it with a $29 airtex mechanical (with the bypass plugged)from autozone. Some people have good luck with electric pumps and relays and switches and regulators and all that wiring, i don't.
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    Also b3e sure you have the right pump for flow needed for that engine, at least 130 or 140 gpm

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    Quote Originally Posted by RiverRat1989 View Post
    how do u get 7psi throughout the whole rpm range ?
    You should be good just running a 750 carb with a blue pump. Its an old topic, but it depends on how hard the pump has to work. Flow of filters, size of lines from tank to carb, etc., all have an effect. But you should be good. Fuel pump are rated at free flow. Its like the old saying, an Indy car will do 250MPH, but won't do it towing a trailer.

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    Quote Originally Posted by Ol Blue View Post
    You should be good just running a 750 carb with a blue pump. Its an old topic, but it depends on how hard the pump has to work. Flow of filters, size of lines from tank to carb, etc., all have an effect. But you should be good. Fuel pump are rated at free flow. Its like the old saying, an Indy car will do 250MPH, but won't do it towing a trailer.
    Im running -10 from the tanks to a 10 micron fuel filter water separator to -8 out to the fuel pump. Should be pretty free flowing. So now i guess my question is at idle what should i be set at pressure wise that will run good at WOT?

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    It could stay where you want it just floor it turn your head and look. No wait have a passenger watch the guage for you.

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    I'm running a blue with 2 750s and never had any fuel issues at WOT. you should be just fine
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