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RexDodge · 03-13-2013, 08:22 AM

Depends on your fuel delivery set up. If you have a mechanical pump and your carb setup takes the full pressure you shouldn't need one. If you have a high pressure pump and any fuel is bypassed you'll need a return line. I believe some hp mechanical fuel pumps came with a bypass port. If this motor is the same as before the tank swap and you did not run one then...no, not needed.

03-13-2013, 08:22 AM	#2
RexDodge Registered User Join Date: Apr 2008 Location: Oregon City, Oregon Posts: 741	Re: Do I need a Fuel Return Line? Depends on your fuel delivery set up. If you have a mechanical pump and your carb setup takes the full pressure you shouldn't need one. If you have a high pressure pump and any fuel is bypassed you'll need a return line. I believe some hp mechanical fuel pumps came with a bypass port. If this motor is the same as before the tank swap and you did not run one then...no, not needed.