Thread: Plumbing fuel line

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I've never used a return line with Holley pumps.

Originally Posted by clover47

Holley Technician said I didn't need a return line for this setup (Red pump with Holley 600 carb).

A lot of guys on the Chevy Talk Performance forum won't use Holley pumps and prefer Mallory, Carter, or Aeromotive. Now the newer Holley gerotor design is far superior to vane design of older-style pumps. They are not as noisy and have a longer service life.

I've never used a return line either. The one on my 27 was 7 years old when I tore the car down, and the one on my Jeep was 5 years old. The one on my 23 is now 3 years old, and none of them has ever failed. I do think I am going to go with a Carter on the next car, only because the Holleys can be noisy, some more than others. But open headers generally take care of that problem.

Don