Fuel restriction w/ 6an line?

1969ProDart said
Ok my question is.. well I have a fuel restriction if I run a 6an hose from my FPR to my carb.
My setup (from the fuel cell to carb)

10an fitting w/ 10an line to filter
(From filter to pump) 10an fitting w/ 10an line to holley blue fuel pump
(From pump to FPR) 10an fitting w/ 10an line to holley FPR
6an fitting w/ 6an line to 6an banjo to edelbrock 1407 carb

I'm running a 383

Should I run a bigger line from the FPR or would I be fine with a 6an.

Usually you don't want to go two steps down, especially down stream from the pump and after the regulator. Theoretically, you should only have regulated fuel going to the bowls so if you have a step down after your regulator, your pressure will vary. The best place to have a step down would probably be right at the cell but realistically you should only go to -8. Also, an Edelbrock 1407 is not a real racy carb. so unless I am missing something, your delivery system is overkill.

On my car, I actually do have a single step down in my fuel line. I have a 1/2" pickup in the tank but my lines are 3/8. I used a -8 to -6 adapter right at the pickup outlet. Seems to work fine, no problems in the fuel delivery department for me. Kind of defeats the purpose of the 1/2" pickup but I'm not terribly bright sometimes.

Just out of curiosity, why are you running -10 stuff? That's a pretty huge line at 9/16 inside diameter. (-6 is basically 3/8 inside diameter) In other words, its way more than necessary on a street car or even a fairly healthy race car.