curtisad

iTrader: (4)

what size is the main fuel line and what size is the return? Am trying to order some fittings to run some steel braided lines.

super_kev

iTrader: (5)

Main: 3/8"
Return: 5/16"

ls1290

iTrader: (20)

-8an feed and -6an return.

Keith

ChevyChad

iTrader: (50)

actually, a 3/8" is a -6

I used -6 braided lines for both...

you do know that the LS1 f-bodies don't have a dedicated return line tho right? You can use the EVAP as a return if you want. It is a 5/16

curtisad

iTrader: (4)

I thought the evap was the return. Can you give me a quick lesson on what the evap is?

ls1290

iTrader: (20)

The EVAP system in a nutshell is a system that drawns fuel vapor and overpressure from the fuel tank and puts into the intake manifold. Removing or disassembling the EVAP will throw codes and is consider an emissions piece of equipment.

Keith

ChevyChad

iTrader: (50)

You will need to have the codes turned off if you plan on doing that way. I did a half *** writeup of how I did mine.

https://ls1tech.com/forums/fueling-injection/698950-does-anyone-have-write-up.html