The fuel line size sort of goes with how much HP do you plan to have and how many carbs you run. If you only have 400 HP and a single carb you should be OK with a good 3/8 line. If you have 700 HP and a single carb you need a 1/2 inch line, dual carbs and maybe you need a 5/8 line. I have used aluminium line but it is a pain to hook up cause you need compression fittings and it's hard to route it and get it under the car. Braided lines are easier to install but have to have more mounts to keep it from sagging and it's not cheap. Do your best to keep fuel lines on the outside of the frame so it doesn't get hit by anything that may break like the driveshaft, flywheel, flex plate, trans and stuff.

 

You can run it anywhere it'll fit, but most try to keep it outside the frame away from say, a driveshaft that decided to leave unexpectedly. The only track legal thing to be concerned with is keeping it off the firewall.
Size is usually determined by horsepower, 1/2" aluminum or -8 braid works well for the average guy with under a bazillion h.p. My B.G.400 pump says to use -10(5/8") to feed and return, but I've had -8 on forever and it's plenty. The filter on mine is attached directly to the pump inlet.

 

my fuel sender is 3/8... i see the recommendations for -8... but would i be ok with -6 ???

 

my fuel sender is 3/8... i see the recommendations for -8... but would i be ok with -6 ???

Kinda defeating the purpose depending on how much HP yer gonna be making.

 

340 with the 327 ??? more with the 377. the engine's still not firm...

 

my fuel sender is 3/8... i see the recommendations for -8... but would i be ok with -6 ???

3/8" hard line (and sender) up to the pump and -6 flex up to the carb got me up to a traction-and-tuning limited 13.1 in the quarter. I don't think it's the fuel line keeping me from going faster at the moment. I think I'm good for mid 12s on the current combo.

 

3/8" hard line (and sender) up to the pump and -6 flex up to the carb got me up to a traction-and-tuning limited 13.1 in the quarter. I don't think it's the fuel line keeping me from going faster at the moment. I think I'm good for mid 12s on the current combo.

That's cause you ain't making any power :beat:

 

That's cause you ain't making any power :beat:

Try tuning your own motor a bit better. Stop throwing cubes at it, Indy.

 

i'm not worried about power. i know i'll have more than i need. if i do wanna join the guys at the track ta make a fool of myself... i'd like ta at least be legal ta make it ON the track

power is relative to yer environment, no ??? yer talkin' 1/4. i'm not. so i dunno if i'd be needing the requirements you would with the "Squirrell special"


either a 600 or 650 on the 327, 650 on the 377. double pumper's

 

Sounds like you should be OK with the 3/8 stuff. Size 6 line is 3/8 if you didn't know that already. JMHO, RM

 

For your combo, you will be okay with the #6 line. Just run it on the outside of the frame rails until it gets forward of the flex plate/fly wheel. Also as noted, no part of the fuel system can be mounted to the firewall.

 

JohnNY....If you do go with the 377, I think I would go with a 750 carb at least. I had 650 on the 355 and it didn't act like it was getting enough. The 358 has a 750 and its very happy. RM could probably give you some advice there.

Don