u/Bwoss275

Hi everyone, I'm building a 1978 Firebird with a 6.0 LQ4 engine and a 78mm turbo bolted to it. The question is, what fuel line size should I use? I've seen online charts saying I should use -10 size lines, and other places say -6 is just fine.

Important info

6.0l lq4 engine bored to 408ci

Turbo is a vs racing Vsr next gen 7875 with 1.25 AR turbine housing

Cts-v fuel pump (gen 2)

Also I want to make around 700 hp