Mopar Muscle Association UK

If I fit a Holley blue top pump do I have to also fit a regulator, I do have a return from the carb to the tank so don't know if this will take away any excess pressure from the carb. Over to you guys with the knowledge

An electric pump would require a regulator.

Yes, a regulator is required.
You can "Dead head" it without a return line and it will work. Not the best design but the easiest and most simple.

You really need to install a Pressure gauge - either a small one near the Carb, or a remote one inside the Cab - you obviously cannot run fuel into the passenger compartment.

The Coronet ran an 11.02 with an AN-6 line and a Holley Blue dead-headed, so it will work on a road car Ok - just noisy!!!!!

I prefer to run return lines but more than double the cost and grief.

Pete wrote:Yes, a regulator is required.
You can "Dead head" it without a return line and it will work. Not the best design but the easiest and most simple.

You really need to install a Pressure gauge - either a small one near the Carb, or a remote one inside the Cab - you obviously cannot run fuel into the passenger compartment.

The Coronet ran an 11.02 with an AN-6 line and a Holley Blue dead-headed, so it will work on a road car Ok - just noisy!!!!!

I prefer to run return lines but more than double the cost and grief.

I just happened to have to re do my whole fuel system,and I have this very pump, yep noisy,but it puts out what I need,and I also by passed the return line just to see how it does in the 100 degree heat, well so far no issues did a 100 mile trip and didnt miss a beat, so now I have a return line on the car,just in case but the dead end seems to be fine with this pump,and regulator

Cheers guys

normal carbs only need 1.5 - 3 psi to run fine any more floods them a low pressure fuel pump will produce lots more 10 -12 psi
Ive never run a return on carbs, dead head works fine, my little ford xr2 race car only runs 2 psi where as my coronet runs about 7psi ( I think cant remember currently typing this on stella ) any more will start doing damage/flooding the carbs

7 psi is about right for a grown up car.

Derek why not just use a decent Holley mech pump less noise and hassle the bigger Holley will handle most pressure flows. Speak with Anton he put a high input one on mine .
Rich

The biggest issue (amazingly) with mechanical fuel pumps nowadays is the pump push rod on a Big Block.

It seems that now all the zinc is removed from the oils the Pump rods wear like mad and result in (if you pardon the phrase) a very short stroke resulting in fuel starvation.