Fuel regulator suggestion
 

I currently have a Holley black pump and the standard Holley regulator. I have a Quadrajet carburetor. The pump seems fine , but what would y’all suggest for an upgrade on the regulator?

Re: Fuel regulator suggestion
 

Just remember the more surface area the regulator has the smoother the regulator will bee.

Re: Fuel regulator suggestion
 

I have a similar set up as you do. I have a Magnafuel 2 port regulator on my car right now. It works good. That being said I hear the the Product Engineering bypass regulator is supposed to be a big improvement for the Q jets, So if you plan to upgrade you might take a look at the Product Engineering regulator.

Re: Fuel regulator suggestion
 

I have run my same setup for years with no issues, but now I have the same motor in a heavier car with fresh air induction opposed to a lighter car with a flat hood. I now seem to have a fuel supply issue. I am hoping to get some more flow with a larger-better-less restrictive regulator. The Holley is 3/8 in and out, not sure if I should go 1/2 in 3/8 out or 1/2 in and out.

Re: Fuel regulator suggestion
 

Jeff: We have Aeromotive on my Olds and my son's Camaro. His is a bypass and mine's a deadhead style. With a Q-jet, I run -10 from the cell to the regulator and -8 from the regulator to the carb. If I had to do it all over again, I would consider the Product Engineering unit for Q-Jet like Mike suggested.

Re: Fuel regulator suggestion
 

Jim, I am glad you replied. We have the exact same combo. Did you ever run the standard Holley regulator and did you ever have any fuel issues with that setup?

Re: Fuel regulator suggestion
 

I run a Holley regulator on most of my stockers.
Cheap and easy to service when needed. Never
had fuel deliver issues. Better than I can say for my full
Aeromotive setup on the Superstocker! It drops from 6.5
to 3 in the last few hundred feet no matter what I change on it!

Re: Fuel regulator suggestion
 

I believe I have a brand new automotive 2 port regulator. Can check on saturday

Re: Fuel regulator suggestion
 

Good morning to all,
A few seasons back I switched to a Magna Fuel pump and the Bigger Holley Regulator, I think the part number is #704 and it has a green colored diaphragm which is alcohol resistant. I have 5/8" fuel line from tank to regulator and 1/2" from regulator to carb ( Q-Jet). Checking fuel flow at the carb fitting I can pump 2 gallons of fuel in 30 seconds set at 6 lbs. of pressure. I hope that helps, the bigger regulator has larger diameter orifices internally which should help for fuel flow.
This is probably over kill in my stocker but might help your combination.
Have a Good Day.

Respectfully,
Henry Kunz 1534 H/SA

Re: Fuel regulator suggestion
 

What is your pressure befor regulator? You need 7.5 lb of pressure per G’s of acceleration just move the fuel to the regulator!

Re: Fuel regulator suggestion
 

I’ve been struggling with my car all year thinking it’s the QJet
Put 5 carbs on in 3 races finally I figured out
It can’t be every carburetor is bad I have a4 port aeromotive regulator
Tested fuel pump it’s fine
Never had a problem with the old Mallory regulator
Will try it next weekend Lebanon valley
Areomotive. Never again

Re: Fuel regulator suggestion
 

I am at 30 seconds for 1 gallon of fuel after the regulator.

Re: Fuel regulator suggestion
 

I really don’t think there is such a thing as overkill for anyone of us that has to run an O.E.M carb. Most of the float bowls are designed for a production engine and are too small.I’ll be running a large weldon pump,5/8” fuel line and weldon regulators at both ends of the car.

Re: Fuel regulator suggestion
 

If running a Quadrajet, the best is the Product Engineering PE 9000 fuel regulator system.

https://product-engr.net/products/hi...ulator-systems

Re: Fuel regulator suggestion
 

Jeff -

I use the magnafuel pump and regulator, -12 from cell to pump and -10 from the pump to the carb. I have the bypass pressure turned up to 50psi and the regulator set at 7.2 with this set up ive never had any fuel delivery issues

Re: Fuel regulator suggestion
 

On my 327 Stocker engine, I moved to the Quick Fuel 30-803QFT regulator....basically a physically bigger and improved version of the traditional Holley regulator. With this regulator and bypassing back to the tank (bypass line submerged in the fuel tank), the pressure was quite a bit more stable.

https://www.holley.com/products/fuel...arts/30-803QFT

You can see it in this pic during a dyno session:
https://i.imgur.com/mZwNBhLh.jpg

Hope this helps. :) -Al

Re: Fuel regulator suggestion
 

Mallory 4 port regulators are on sale right now. Under 80 bucks. It’s a bypass regulator. I stopped screwing with all that other stuff years ago.