Fuel Lines for FI

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Vbb199

B-rate Hillbilly Customs
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89 Suburban R1500, 79 C10
Engine Size
350, 502
Did you use the remote sump or in tank pump?

If in tank, tsk-tsk, lol! Holley specifies a 3/8(-6AN) for the return too, iirc. My factory return was 5/16”. In all reality I’m sure you’re fine. In fact, I think I contemplated reusing the factory lines, but it hadn’t run in a while and I was worried about crap in the lines clogging my injectors as well as the crap e10 fuel eating them up.


In tank fuel pump :)

The... Acdelco... EP381 I believe.

The holley efi uses 6an send and return.... I just retained the tbi's original 16mm and 14mm send and return lines, and purchased adapters.

Seems like the return just dribbles.... Not very substantial pressure.
 

Frankenchevy

Proverbs 16:18
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In tank fuel pump :)

The... Acdelco... EP381 I believe.

The holley efi uses 6an send and return.... I just retained the tbi's original 16mm and 14mm send and return lines, and purchased adapters.

Seems like the return just dribbles.... Not very substantial pressure.
You probably return quite a bit less with the 502 than my itty bitty tree-fitty!
 

Vbb199

B-rate Hillbilly Customs
Joined
Jan 12, 2018
Posts
9,108
Reaction score
15,456
Location
Salisbury NC
First Name
Vince
Truck Year
89, 79
Truck Model
89 Suburban R1500, 79 C10
Engine Size
350, 502
You probably return quite a bit less with the 502 than my itty bitty tree-fitty!


It's a thirsty bish.

It drinks a gallon of 93 or whatever the highest octane I can get locally is in about 25 minutes or so.
 

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