hi , how fast we can go whit stock fuel line and walbro 340 ! 72 pound injector ! when we know we need to change for bigger fuel line ! i still run my stock fuel line whit a walbro 340 and i have a pt70 b-b gtq and 72 pound injector ! i want to go whit a dubble fuel pump but how fast i can go whit the stock line ! is my street car i don't want to go whit outside f-p ! i already have my s2 for that ! thanks