Looking to buy a Holley 465 carb setup and was wondering if 4.5-5psi will be enough to support this system. I have an Airtex e8012s pump that is rated 5-9psi @30gph. The max I am getting with this pump is ~4.5psi when the motor is running and about 5.5psi when it is off. I am using the FPR that I bought from "Kim's FB." I disconnectted the regulator and hooked the gauge only up to the fuel line and still got a reading of 5.5psi.
Thanks!
Justin

 

do you know accurate the gauge is?

you should be able to get away with that pressure if it's giving you a high volume. if not, then you may experience some starvation issues. however, in my experiences thus far, i've usually found the need for at least 6 psi. it was the starvation issues that led me to get a Holley pump and it's still doing the job.

 

You need 6psi and 120gph.

 

are you sure its not 120lph?

 

Just looked on racingbeat.com and it says 6psi @ 20gph.... are they way off base?

 

mods are listed above, stock port

 

I ran 6.5 psi....

Dan

 

racing beats manual/catalog says all holleys should be 6.0 psi...or the fuel pressure on all holleys rather

 

so 20-30gph would be enough?

 

what about stock nikkis what r they suppose to run

 

Do you have your system setup as a deadhead or return style? If you are running a return, take the stock fpr, the barrel shaped fitting in the return line and turn it around. That will make the system deadhead and bring your fuel pressure up.

 

6psi is suggested for all holleys far as i know..

return line isnt really needed, i've run without the FPR entirely without problems (waiting on a order for a new FPR) and the car ran the same. no noticable difference at all.

4.5 psi doesnt sound like enough. i'd make sure your pump is getting a proper 12v first, easy done with a voltmeter.