Fuel volume drop after regulator?

[Kenny Wigington]

25 or less, Doug. I had a Holley black pump and it would not have enough volume, to keep a quadrajet full, especially at launch. I switched to a Magnafuel 275 and reg., and it made a big difference. Dont use a small fuel pressure guage, a full sized one will be more honest. Run at least a -8 or even a -10 line.

[Daran Summerton]

I too just had a blue pump crap out and just replaced it with another blue pump. All the while I was jerking around with it I could not help but wonder is this really worth it vs. a nice mechanical pump??? Really, how much ET could I possibly lose given the GPM was adequate with a mechanical and 1/2 alum. line and get rid of all the braided crap. My guess is not enough to offset the 1000$ in a fuel system.

[Adger Smith]

Those Holley Regulators are a joke.
Less than a .250 hole with a .090 pin passing through the hole... not near enough area to pass a decent volume of fuel. I would bet the area of the jets in you Q-Jet are more than twice the actual area available in those Holley Regs...Size the line based on N/S volume and Regulator volume.
OH! did you notice those nice big fittings on that blue pump and that little feed hole inside....never measured one, all it took was a look, but 1/4 in might be near the size...

[Mike Pearson]

The holley pumps have been real reliable over the years in my car. You will need 2 of them to supply enough fuel for a Q-jet. I run 2 holley blue pumps and an Aerospace 2 port regulator. I will replace this system with a single Aeromotive, Magnafuel or similar pump when needed.

[BobUnkefer]

For What It's Worth.....

Just replaced the fuel system on my D/SA with a complete Aeromotive system and found a .10 of a second that had been hiding. Most noticably in the back half, car now pulls HARD the last 660.
I replaced an OLD (antique?) Mallory pump & regulator and the 1/2" lines the fuel was running through. I now have 2 -8 lines running from the cell to the pump, with a -10 line running forward to the regulator & then the carb.
Even got a call from Aeromotive about a month after the installation asking me to send the regulator back because there MIGHT be a problem with it, swapped it out @ no charge.
Still tinkering with it, heck, there might be some more...... From what I've learned, that Q-jet needs alot of fuel getting to it.

Quality products, GREAT customer service!

Unk

[Matt Welker]

Aeromotive is the best way to run a Q-jet and a good investment for your car. It costs less to do it right than to do it twice.

[Mike Pearson]

Which Areomotive regulator are you using? most only show a #6 line to the carb. one of my buddies bought one and we had to drill and tap the regulator to install a #8 fitting. the carb was starving for fuel with the #6. other than that the reg works good.