Anyone know what the limits are of the stock fuel lines on a return system? I'm going to be running billet fuel rails with an aftermarket FPR, 96#/hr injectors, twin in-tank pumps. Should I be looking at replacing all the stock fuel lines too, or will those be ok with all the other stuff?

 

i think parish ran stock lines but had a few minor hiccups. for the cost of fuel lines i would run them. its not worht the hassle or money of pulling and rebuilding a motor for the cost of fuel lines

even then you werent pushing the limits of things, wasnt you low numbers for most part? something else is going on. didnt you have a oil issue before?

 

Mmmkay I'll look into running new lines. What would you suggest for size of feed and return lines?

What low numbers are you talking about? And what oil issue? I have some oil smoke out the tailpipe intermittently, but I'm about 99% sure it's from the turbo, not the engine.

 

yea i think i read about you smoking. maybe it is related to the motor perhaps?
i was saying you never did crank it up over 6xx to wheels. i think at the numbers you were at you within all reason of your combo

you wont know for sure till you tear it down and see what happend

 

Yeah at 10 psi I made 575/640 to the wheels, but that was on a non load bearing Dynojet. I think at 15 psi I would be well over the 600 hp and 700 tq marks.

 

still within the limits of stock fuel lines

 

I think you were closer if not over 700rwhp to run the trap speed you ran.

 

Using a couple of different online calculators they seem to be right around 700 at the crank, give or take about 20.

Of course, I'm shooting for 10's so a 10.99 @ 125 in a 5400 lb race weight gives me roughly 800 at the crank.