Hi guys
Going 6pak on my mild 440. Looking for a good mech pump. Do I need to have 8-9.5 psi or can I run a 6-8.5 Im looking at Carter pumps and was going for the dual diaphram 8-9.5psi but I see both pumps have 120gph

cheers Dave

We had some bad luck with 4 Carter pumps.Went back to Holley pumps.Mine feeds my 1050 Dominator with no problems.6 to 7 psi is more than enough for what you have.8 to 9 will probally blow the needle valve off the seat and flood.Rocky

I been running Carter street or strip mechanical pumps on my sm and BBblk 6 pak motors, for the last 25+ yrs, with never a failure, nice pumps,....if your running the stock rubber needle seats stay with the street pump, as the strip pump (8+ psi) will pressurize the needles when they close, and force them into the seats, preventing them from opening, resulting in no fuel DAMHIK ....if you want to run the strip pump, Holley has high volume/pressure steel or titanium seat assys,.....myself I generally run the strip pumps, and steel seats

We ran Carters also.Till I hade 4 bad ones.One was street strip SB and never pumped.One BB the arm broke and the spring went in the pan.Replaced it with my 25 year old Holley till we could get a new one.One lasted a week in my BB another only had 3 to 4 psi street strip BB.Put a Holley on and had 6 to 7 psi.Rocky

Is the Carter prob an old stock prob or is this more recently?

cheers

carter 6903 6lb pump will work. thats what i've used for years on my 6-paks. mancini has them.

what is the set-up? Holley makes a good pump, as does Carter. If it's stockish even a NAPA pump will work. I used the stock 440-6 replacement pump on a 440-6, ported iron heads and Mopar 528 solid and has zero fuel issues. I'd think 9psi would also be too much pressure. 7-8 should be plenty.

OK, cheers guys, I'll go for the smaller Carter andmight check the NAPA one too. I want the orig look, so prefer no chrome.

Dave