Fuel line size?

I would go with 1/2 inch. 500hp doesn't need that much but it gives you room to up-grade your combo at a later date without worrying about fuel lines again.

just run -10 all the way. it wont hurt anything.

On a mechanical pump I never like to have any restriction on the inlet side of the pump. Much better to have it a little big than to small ! It will push the fuel a lot better than it will draw it.
Gary

You can have too big of a fuel line. In a drag race car with a rear mounted cell you can get into a situation where the weight of the fuel can cause the fuel to stall in the line at the launch. Just depends on how good of a pump you have and your hp requirements.

500hp=mechanical pump use 1/2" with an electric pump 3/8" should work but getting close to where 1/2" would be wanted. Basing this on past experiences.

I hate to ressurect an old post like this but... If you are using factory pickups in the tank (or tanks as in the case of my project truck) , arent the outlets on these small like 5/16"? Is there someone who makes larger diameter pickup tubes to remedy this issue?

I make my own tubes

my car was a six cylinder car. i replaced the factory line with 3/8 steel. i only have one union (around the drivers side rocker) from tank to pump. i soldered a new pick up tube in the old sending unit. it was like trying to suck through a bar straw. bobn

AN-10 supply and an-8 return with an aeromotive A1000 pump on my ranger. Supplies the big bad 2.9L just fine. HAHAHA!!!!!!!!!

1/2"

My 460 ran OK with mech pump and original 5/16" line. the new 521 (about 500 HP) would lean out after about 5 seconds of WOTwith the mech pump and 5/16 lines. I replaced the tank with a fuel cell (-8 connections) used a black holley pump and -8 lines and all the problems went away.

crittersf1 said:

I make my own tubes

Click to expand...

X2....... 1/2" aluminum tube and either TIG weld or JB weld it. A Holley Black pump and -8 lines have supplied my twin 750 pumpers quite well for a number of years now.
Rob

http://www.centuryperformance.com/f...tanding-fuel-pressure-and-volume-spg-140.html

-Jared

t120r said:

AN-10 supply and an-8 return with an aeromotive A1000 pump on my ranger. Supplies the big bad 2.9L just fine. HAHAHA!!!!!!!!!

Click to expand...

The return needs to be one size larger, not smaller.