Questions about my Mechanical Fuel Pump

Ironmike said
I'm running the 6270. Mine does not put out too much pressure and I do not have a return line. I see 7psi cold and 5- 6 or so when hot. Heard about some of them putting out too much and was prepared for it but mine is just fine.

FWIW the Edelbrock and Holley High volume pumps BOTH showed numbers just like yours on the dyno, and even lower. The Carter was my last shot at a mechanical. So far, so good.

Thanks for your experience and input. I was thinking of the Edelbrock pump, but glad you posted that. I've heard nothing but good things about the Carter, except that the output is in all different ranges.

Lelo Dart said
I see 6.9 to 8.1 psi. What is the max psi for your carb?
How about this one? http://www.summitracing.com/parts/dcc-4529368/overview/make/dodge

I've looked at that pump, Ive ran across some articles with fitment issues if you have an aluminum water pump.

RustyRatRod said
A 5/16 system is plenty big enough for what you have there, IMO. I think a good quality pump and regulator will work well. A return line would not hurt. If you do that, make sure you get a return style regulator.

Rob, The guy at the dyno mentioned the same thing.. A good quality fuel pump with the right amount of GPH is key. I've seen the term bypass regulator as well as return regulator. Is there a difference? Also my sending unit does not have any extra lines to return to. The 3/8 unit looks like it has a return line built into it. That was one of my hangups.. Where to return it to? One of the 4 vent lines on the tank, new sending unit with a return? Kinda stumped.

EL5DEMON340 said
To the OP i would make sure you have a 3/8" pickup and fuel line to the pump, the pump might actually work better on the car with a full tank of gas. There will be some pressure on the suction side of the pump with the fuel in the tank.

Thanks, I do have a roll of -6 PTFE tubing I could use in place of the steel line, if I decide to go that route. I have also read that I should keep as much steel line as possible on the car instead of running stainless braided the entire run. Im not sure why, but there must be a reason.