Fuel Pressure?

[TheMayor]

I just installed a new Holley Marine Mechanical Fuel Pump on a relatively stock Hardin Marine 454 330 HP running an Edelbrock (#1410) 750 CFM Marine carb. There are no specÂ’s stating what fuel pressure this pump puts out, just gallons per minute. The question is do I need to run a Fuel Pressure Regulator? What fuel pressure should or does this motor need?

[Rexone]

The carb should have around 7-8 lbs max. Anything above that should have a regulator. There are lots of threads here on the regulator subject. Do some searches.

[shaun]

I have a mallory series 110 (pn# 4110). This is a pretty expensive pump from what i've seen in the catalogs. It looks like it will deliver 7PSI MAX and is a high volume pump. With this pump do i need to run a regulator? It doesnt seam like i would. Also i'm pretty sure it will be fine but would this pump feed dual 660's with out a problem? I dont see any it wouldnt with the amount of flow it will deliver.

[Rexone]

The 4110 does not normally require a regulator.

[shaun]

Rex: whats your opinion/experience with the pump? I hear it's a really good pump, probably overkill for my app.

[Kindsvater Flat]

Shaun... You are always better to have a little more pump than what you need. But if you went with something that wasn't enough you would end up with a lean condition that would waste what you have just done.

[Rexone]

the Mallorys have been excellent pumps for us. As with any fuel system check your pressure to make sure it's adequate at WOT. Don't assume. Lot's of varibles.
I run Mallorys on my own stuff and they've worked well.

[spectras only]

shaun , read my post in topic "mounting an electric fuel pump"