Fuel Line Size
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 930
Likes: 13
From: Aiken SC
Fuel Line Size
Looking to install a new fuel line from the tank to the pump. Shows both 1/4" or 3/8" diameters. Which one is correct for my 72 coupe or how do I find out? Have no idea just by looking.
Thanks
Thanks
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,149
Likes: 9,278
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
3/8 supply . 1/4 return. IF you are running a stock motor up to about 500 hp you should be fine with those. If you are running EFI and want a return line they suggest 3/8 for return.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,149
Likes: 9,278
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 930
Likes: 13
From: Aiken SC
Thanks guys. It is 1/4" for the return. I've always called it the vapor line but I ordered the 3/8" to the pump also. BTW, read somewhere you had to have the body off to install these. I've always remedy the body mounts, jack the car up a little bit and put them on. I guess now I know that I can't do that...........
Melting Slicks
Joined: Aug 2004
Posts: 2,906
Likes: 228
From: Oakbank Manitoba
The 82 had a 5/16” tube (return line) at the sender on top of the fuel tank but it connects with a short piece of fuel hose to a 1/4” steel fuel line to the engine. No C3 Corvette had a 5/16” return fuel line that was OEM.
I had Inlinetube make me a custom 5/16” return line front to back. It was easy for them since it’s fed and bent by automated machine.
I had Inlinetube make me a custom 5/16” return line front to back. It was easy for them since it’s fed and bent by automated machine.
Last edited by KENS80V; Nov 29, 2022 at 10:29 AM.
Safety Car
Joined: May 2001
Posts: 4,747
Likes: 1,642
From: Fairfax Virginia
Classic Tube in Upstate New York makes the fuel lines in either Stainless or regular steel. They make them exactly the same shape as the original lines came. I had to replace a set on a 1988 C4 and it was more than just a PIA.
On the Holley EFI systems they don't all require a "Return Line". I am using a Holley Stealth Sniper with a Holley EFI Fuel Tank module that sends 60 psi directly to the throttle body using the factory lines.
On the Holley EFI systems they don't all require a "Return Line". I am using a Holley Stealth Sniper with a Holley EFI Fuel Tank module that sends 60 psi directly to the throttle body using the factory lines.
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