Do you think my 6AN Line will feed a hungry 500 hp turbo charged engine with out any problem, or should I fork the money for a new set of 8AN lines?
The only restriction looks to be one of those aeromotive fuel filter Fuel filter , stummit says it will suport 1,000hp. I use them at work on 700hp+ gas turbine generators and they work great.
I have an up close pic of it on my car domain site too.

 

run a -10 line and then at least a -8 return..-6 isnt gonna cut it..
-8 and -8 return would be the minimum that you should run..The problem with the smaller line is that with all the turns that you will have to run your "head" decrease...Thbus its better to run the larger lines and decrease them up at the engine..
It has been said that hard leaving cars will have a pressure drop but a good pump and decent voltage will not allow this..The theory is that the fuel will get pushed back up the line..Ive run 1.22 short time with a dash 10 and an sx pump without problems..

 

I agree the -6 is going to be small. -8 would be much better. I run -10 from the fuel cell to the carb.

 

I have experianced "Fuel Stack" in my old 74 Z28. car comes out like gang busters and dies a half way to the 60Ft. At least that is what Barry Grant called it when I was getting help from them.

the trend for the car manufatures to use smaller line is it takes a smaller volume yet high pressure pump to keep them full. if you have the killer pump go with the big line. if you are worried go with a smaller line that will have less fuel to "Stack" on take off but still be able to keep your injectors feed.

I am feed ing 400RWHP with stock lines and two pumps I have used this setup to 550RWHP on some cars.

IMHO If you are planning on going over say 450 with a power adder go with a big pump and at least bump to #8 feed and return. run a volt blaster to the pump or the variable volage regulator from Aeromotive.

Good luck!

 

I run a -6AN supply and -6AN return to supply 64# injectors at 58psi, and produce 800flywheel on a 300-shot of DRY nitrous. No problems whatsoever with fuel pressure or volume. I guess I'm one of the few people that believes bigger is not better, and I buy into the concept that when you are pulling 3G's on launch, you really do not want the mass of fuel in a -10AN line pushing back on the fuel pump discharge and causing a sudden pressure drop.

Dual 205LPH Bosch pumps running in parallel, SX billet filter, rails modified to supply each from the back and take the return off the front of each rail, Weldon pressure regulator.

I did see a -10AN supply line on George Baxter's latest monster, but that's a 1,325HP 383/Vortech setup.

-10AN fuel line install

 

I just rembered that at my shop that gas turbine generator that can make enough wattage to power a small town is fed by 1, SS 4AN line to the big injector and it is full of 90* bends all the way.
It sounds like the carb guys need big fuel lines while the injected guys can get a way smaller ones.
I mom just found about 14 ft of brand 8AN hose in my room back home and if I rember right it was some non matalic 303 aero hose for a tractor or some thing like that but I know I don't have any fittings for it. I'll try and use that.

 

I'm running a 6an feed and retutn, with fuel pressure set at 90 psi. Going off mph the motor is making 630+ hp