How much fuel pressure???

bigdaddy999 · 09-04-2005, 08:13 PM

i have a holley 4bbl carb with a high volume holley electric fuel pump. unfortunately there is so much pressure that fuel spits out of the carb overflow, and today decide to catch on fire. i obviously have to put a regulator on, but i was wondering if anyone knew how much fuel pressure i will need to set it to. it hs some mods, but not many.thanks for the help

lx mike · 09-04-2005, 09:05 PM

no more than 6-7 psi on the holley carb.

~The Jester~ · 09-04-2005, 10:00 PM

Check your floats too. If they're sticking, or adjusted wrong (too high) it'll spit fuel out the vent tubes as well. Like LX Mike said, 6-7 for a carb is just right.

ols0051 · 09-05-2005, 11:41 AM

6-7psi, also when you put in the regulator keep an eye on it. Mine climbs to 11 psi if the pump is on engine off. If you can, spring for a better regulator than the holley. My blue pump came with a regulator and you see how well that's working..

~The Jester~ · 09-05-2005, 05:20 PM

Higher end fuel systems don't have to worry about that stuff, but he's 100% right. When the fuel "dead heads" against your needle/seat the fuel pressure is gonna climb. The longer it runs, the higher it'll go. You should be OK with a Holley regulator for what you're up to, but keep in mind set the pressure with the engine RUNNING. Also like I said before, check the floats FIRST.

09-04-2005, 08:13 PM	#1
bigdaddy999 Registered Member Join Date: Aug 2005 Posts: 34	How much fuel pressure??? i have a holley 4bbl carb with a high volume holley electric fuel pump. unfortunately there is so much pressure that fuel spits out of the carb overflow, and today decide to catch on fire. i obviously have to put a regulator on, but i was wondering if anyone knew how much fuel pressure i will need to set it to. it hs some mods, but not many.thanks for the help

09-04-2005, 09:05 PM	#2
lx mike Undescribable Join Date: Sep 1998 Location: Ft Myers Fla Posts: 1,539	Re: How much fuel pressure??? no more than 6-7 psi on the holley carb. __________________ Rice Haters Club Member #101

09-04-2005, 10:00 PM	#3
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: How much fuel pressure??? Check your floats too. If they're sticking, or adjusted wrong (too high) it'll spit fuel out the vent tubes as well. Like LX Mike said, 6-7 for a carb is just right. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

09-05-2005, 11:41 AM	#4
ols0051 Registered Member Join Date: Sep 2002 Location: cent.wis Posts: 203	Re: How much fuel pressure??? 6-7psi, also when you put in the regulator keep an eye on it. Mine climbs to 11 psi if the pump is on engine off. If you can, spring for a better regulator than the holley. My blue pump came with a regulator and you see how well that's working..

09-05-2005, 05:20 PM	#5
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: How much fuel pressure??? Higher end fuel systems don't have to worry about that stuff, but he's 100% right. When the fuel "dead heads" against your needle/seat the fuel pressure is gonna climb. The longer it runs, the higher it'll go. You should be OK with a Holley regulator for what you're up to, but keep in mind set the pressure with the engine RUNNING. Also like I said before, check the floats FIRST. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply..... Last edited by ~The Jester~; 09-06-2005 at 10:16 AM..

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