running dual pipes???

[curtisimo81]

i just converted a 4 cyl to a 302, i got a doubble hump crossmember, but i was told i'm gonna have to re run my fuel lines.. why? and if i do could i run rubber lines or should i run metal?

 

[blkstangman88]

on a 302 theres matal lines from the tank...(almost)...to the bottom on the engine, then theres a hard plastic line, then metal again to the injectors, when i pulled my engine out i cut the plastic line and just reunstalled 2 new fuel injector lines that were 12in long each......id say as long as the entire line isnt going to be rubber go ahead.

 

[Vipersix]

The only thing you'll have to be concerned with is the fuel line diameter. Obviously the 302 drinks more go-juice than a 4 banger so it needs a larger tube to quench its thirst. Stock 302 lines are 5/16" OD that are good for about 150 lph. If you have a tube that is too small there is a pressure drop in the line when sudden demands are made for fuel which causes a momentary lean condition or could even cause cavitation and cause your motor to die. You may not need new lines... you just have to consider how much hp you plan on running and decide if your lines will be sufficient. The material of the line is inconsequential.

Fuel Volume (lph) = HP X bsfc X .6094 X 1.3

 

[ratrapp2]

i just bought a used set of fuel lines and replaced mine.the previous owner had took rubber hose and used about 6ft. off it by wrapping it around the rack.i tried to buy new lines but ford has discontinued them.