does anyone have experience running a edelbrock with higher fuel psi....

I have a 69 RR HP eng w/ stock pistons & HP heads... HEI ignition with a AVS 650.. I have a holly HP fuel pump 8psi + and I'm wondering if I could eliminate my fuel reg (have it at 6psi as the book says). What do you think??

Thanks!!

I would think you could flood the carb with that much pressure against the needle and seat. If the specs call for 6psi then that should be what you feed it.

May I ask why you are wanting to elim it? You could dial down the reg as is & see how it goes (if that can be done). My eddy 1406 dripped at ~2K with no regulation & that was with a parts house "airtex" mech pump but I have subsequently heard that they put out quite high pressure (for what you think a stock unit would be providing)

well... I installed a GM HEI ignition and was running the car today and my fuel reg(6yrs old,30 dollar inexpensive type) malfunctioned... so I was thinking.. since I went from a point/ can coil to a GM HEI 4 pin / e-core coil ignition with a mech advance old mopar dist. (36deg advance) it runs WHOLE LOT faster so I was just wondering if bypassing a fuel regulator would make a difference or not.... I think I'll just get a nice fuel reg and go to 6.5 psi... Trying to keep the spec original and not go with a bigger carb.... the new ignition seems to be wanting more fuel....

Raising the fuel pressure won't increase the fuel. Bigger carb will do that but even that will still only need the 6psi.

hook a vac gauge to manifold vac port & see what your vac is at WOT up thru the gears. if over 1 in hg then a bigger carb will likely benefit you at WOT but how much time do you spend at WOT. street. street/strip. dragger only. which is your situation

street.. just revamping and making it a daily driver for the local area... car been sitting a few years. basically I put in a 69 RR drivetrain (3.23 sure grip etc) on a 67 satellite body. I bought it with a 318. haven't been on this site for a few years... a lot of new members but some old names as well


Thanks for your help!

Leave the regulator on there.
The AFB is not fond of pressures over 6 psi. I normally kept mine between 4-5 psi and never ran the bowls dry, even when blowing through it with the turbos.

I have been running a 1405 600 since 1988 and using a stock fuel pump for the last 20 years.

I had 2 fuel pressure gauges mounted on my hood out front where I could see them when I was driving for 15+ years. One was for the carb and the second gauge for my nitrous system which was fed from my stock fuel pump.

When I was running a electric(holly blue with too small of a feed line)I would lose all pressure after a half hour of cruising in hot weather from vapor lock. Ever since I went back to stock mechanical I have forgot all about fuel delivery because it's always there even in the hot weather and idling for hours like at the Woodward dream cruise on a 90° day or Vegas during 115° day.

In cool weather I would have 8-9 PSI and about 7 psi under load of fuel pressure and during the hot weather about 3-4 psi under load and about 5 idling at the carb.
Then I took off the fuel gauges so the cops looked at me less and still run the same pump and carb with no troubles at all after about 28k miles.

I have driven it all over the country in high altitudes(pikes Peak) and really hard and long out at bonneville salt flats where I had it wide open for 5 or more miles at a time on 90° days 3 times different years. Talk about a fuel flow test, during theses times I have been using a hemi VS and a return line with my stock pump and the car has never even hicupped even during 115° in Vegas idling for an hour in traffic.

So I never had any problems with 8-9 PSI and my edlebrock carb. A hemi VS and a return line is really nice and works great with a stock pump.

alot of (fuel) aftermarket gauges ain't accurate but if it don't flood & dont starve then all is good in the 'hood

I verified my fuel pressure 3 summers ago when I was having trouble with a miss under load. Took my moroso 0-15 psi tire gauge that has been checked at the NHRA nationals many times(my crew would have it checked several times a year for free at the races) and layed it on my outside windshield under the windshield wiper and drove around with it. I had 7 pounds under load and 8-9 psi at idle. I can't get my picture to upload that shows the psi gauge as I am driving down the road because photo bucket has me locked out. I think I owe them money?

Turned out that I needed fresh spark plugs, I had like 10K miles on them. My manual choke is hard on them.

I am sure of the pressures that I speak of.

that would do it! Alright, it sounds like you are correct on the readings

Nope I don't owe them money, it's due in the fall each year. The other computer I was on before was not doing it for me. This computer is working right.

There is 7# on the gauge as the car is under load going up this slight up hill and it's winter time/cool out.

I would always run the regulator. I had a "preset" Holley pump, flooded my engine and caused a huge backfire, resulting in a huge fire. I saved the car, and put a regulator on it. By the way, the pump was making 12 psi.

I just went through this, too. Do not put more pressure than Edelbrock says it can handle. My AVS can take 6.5 psi, and that's what the Carter pump I use puts out. Even then, I think there's too much pressure. I changed the jets and rods and it still runs very rich. A regulator will be my next step.

IMO higher fuel pressure is not going to make your car run rich. It does not make my car run rich.

Hot weather makes my car run rich and high altitudes does too. I rejet my carb at least twice a year and more often if I take it to higher areas of the country on vacations.

the higher you set the pressure at the reg. the less it will flow.You want the pressure before the reg.

4-6 PSI is a good target.

I have been running a Mallory electric with a regulator feeding a stock mechanical for about 20 years on the same 440, it is nice to prime the engine after sitting for a few weeks.

I can also shut off the electric pump and pull thru with the mechanical but it does not run as smooth.