Hey Guys Looking to start running my fuel lines on my 32 3 window. I have a 350 with 3 x2 barrels. My question is what size fuel line should i use ? Would 1/4 inch be fine or 3/8 line ?
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Hey Guys Looking to start running my fuel lines on my 32 3 window. I have a 350 with 3 x2 barrels. My question is what size fuel line should i use ? Would 1/4 inch be fine or 3/8 line ?
I would use 3/8" at least.
hard to beat 3/8
It would (MAYBE) work with 5/16 line but there would be no savings with 5/16 as apposed to 3/8. You can't go too big.
3/8" works for almost any road driven car (even 5/16" will work in probably 99% - but it doesn't allow for engine upgrades)
3/8 is my choice.
I don't want anything under 3/8 and if I plumb a car I use 1/2 ss with .035 wall
Jerry - wont you run into pressure trouble with a 1/2" and a standard mechanicl type fuel pump? Most only have a 1/4" inlet/outlet and a few at 3/8".Quote:
Originally Posted by jerry clayton
Once you have tubing large enough to satisfy the engine, going to a larger size has no effect on pressure - assuming there's no air in the line.
Dave
there is a differance in TUBE (od) and PIPE (id) sizes
The sizes you refer to are NPT pipe threads and are standard sizes for AN or compression fittings to tube sizes.
A 1/2 od tube with .035 wall thickness is .430 id or just under 7/16. A 3/8 od tube with .035 wall is just .305 id which I feel is small for most any performance engine
Jerry
3/8 should work fine. for race stuff or hp street AN 10 but he is not building any thing with hi hp???? hell i ran mid 12s with 1/8 npt out of the 50 chevy tank
I use 3/8" for road cars and larger for race cars