After reading this, I think I'll go with 3/8". I have to make a new line anyway. The only mod my engine is seeing is a 265 cam ground by the rebuilder and ram horn exh with an h pipe and a pair of generic mufflers. I am a cheap b@$t@*d but if it's the same cost.................

Rono:

In a later post, Paul said his car is an E code with dual teapots. No blower, no boost, no need for boost reference.

John - "The Hoosier Hurricane"

Chuck, Go with at least the 3/8's line. If you have to run a return line, 5/16 would work, but 3/8's costs the same so why not?

Frank/Rebop

Bristol, In ( by Elkhart) 

Paul;
It wasn't clear to me from your initial post if your new fuel pump is for a Paxton/McCulloch set-up. If it is, you will also need to boost reference the fuel pump to the carb bonnet. I used a barbed hose fitting threaded into the top of my Edlebrock fuel pump.

  Ron Lane,  Meridian, ID

Chuck:

A larger fuel line is not a bad idea, you don't want to lean out on top end. I fought lean out for years on my car. The 471 will be an easier setup to supply fuel to, because the carb will not be a blow through like the Paxton setup, the carb will be a draw through and think it is normally aspirated. I assume you will use a later Holley or Edelbrock on top of your 471,so it will have two needle and seats. The single needle and seat of the teapot restricts the amount of fuel it can pass, so it chokes the horsepower. I think I remember Gordon Payne telling me the single needle and seat will allow enough flow for about 350 HP.

John - "The Hoosier Hurricane"

Hoosier,
If I'm running a FE HP fuel pump and a inline pusher electric in the back do I not need to consider a larger fuel line? I do have a pressure regulator between the mechanical pump and the carb.
Once I get the 4-71 supercharger up and running will that change things? I understand it a matter of volume and/or pressure. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Thanks guys, I appreciate your input.

Paul J. - '57 E Code

Paul:

Keep in mind that the teapots don't like fuel pressure above 6 psi, it causes the needle valves to unseat and flood the engine. If you get another pump with higher pressure than that, you may have to add a regulator.

John - "The Hoosier Hurricane"

I hate to say it but one thing that the Garage mans Companion's had over the FORD products of the day was using a 3/8" fuel line over the FORDs 5/16" and the best way to increase fuel flow is to increase the line. On Our stock Cars in the early days before Safety Regulations made us go to steel line we used rubber fuel hose as it was easy to run thru the frame. man what a difference. The A/C mechanical pump performed for several years and was still on the car when I sold it years later.

Tom

What?

Sometimes I point out the obvious. In this case, it is that these fuel systems were designed to utilize vented tanks. The venting was done via the fill neck cap.