Fuel pump for 440, 6 barrel and fuel vapor separator

Sonny · Apr 18, 2020

I’m using an Edelbrock 6psi max fuel pump with a fuel vapor separator and fuel pressure is about 3lbs. Crimp the return line and I’m getting the 6lbs. I just installed a six barrel setup and want to get my pressure back to stock (7-ish?). What pump should I use to feed a non strip six barrel 440?

Lionized · Apr 18, 2020

Sonny said:
I’m using an Edelbrock 6psi max fuel pump with a fuel vapor separator and fuel pressure is about 3lbs. Crimp the return line and I’m getting the 6lbs. I just installed a six barrel setup and want to get my pressure back to stock (7-ish?). What pump should I use to feed a non strip six barrel 440?

I'm curious if you checked the return line outlet of the vapor separator to ensure it's not oversized? Should only be about the size/diameter of a paper clip inside.

I'm about to install the same setup on my 383 so I'm very curious to read more solutions regarding this.

Sonny · Apr 18, 2020

Lionized said:
I'm curious if you checked the return line outlet of the vapor separator to ensure it's not oversized? Should only be about the size/diameter of a paper clip inside.

I'm about to install the same setup on my 383 so I'm very curious to read more solutions regarding this.

Thanks. Yes I did it has the soldered end with the tiny hole. Since I spent a butt load on the pump, I’m going to install a 1/4” ball valve on the return line, shut it off, and if I have any vapor lock issues this summer I can crack the valve open and adjust pressure/bypass vapors with the valve.

biomedtechguy · Apr 20, 2020

Carter M6903 mech fuel pump on my 6bbl 440

Sonny · Apr 20, 2020

biomedtechguy said:
Carter M6903 mech fuel pump on my 6bbl 440

Do you run the vapor separator too?

biomedtechguy · Apr 21, 2020

I haven't taken the time to work it back into the system. I "temporarily" plugged the return line to the gas tank.

Wietse · Apr 21, 2020

If you replace that fuel pump, check your pump push rod length for a state of mind.
When i bought my car i suffered from low pressure/fuel starvation, even after replacing the pump.
Later on checked and found the pump push rod was worn and had became shorter, causing a small actuation of the pump lever, which resulted in poor fuel flow.
I believe the original length is 3,220", if it is shorter than that, replace it for a good brand.
Best buy is a NOS push rod, as the new ones do not come with that quality of steel and heat treating anymore.
That's what i did and still shows 3,220" if i check it.

Fuel pump for 440, 6 barrel and fuel vapor separator

Sonny

It’s all fun til the rabbit gets the gun.

Lionized

Well-Known Member

Sonny

It’s all fun til the rabbit gets the gun.

biomedtechguy

Accelerati Rapidus Maximus

Sonny

It’s all fun til the rabbit gets the gun.

biomedtechguy

Accelerati Rapidus Maximus

Wietse

Well-Known Member

Similar threads