1 fuel line or 2

[hotrod56]

Suggestions on fuel lines. One fuel line system or two - one being a return. LQ4 L/S 600-700 hp blown fuel injected. 1/2" or 3/8" line? Any suggestions on where to find information on the subject?

Thanks in advance for your opinion.

[TheJDMan]

I suspect that engine will require a return line and 1/2" would be better than 3/8".

[andrewb70]

I would do a 1/2" feed and 3/8" return.

Andrew