TBI for my 383

[rsw0331usmc]

I'm going to go with the MSD throttle body fuel injection in lieu of my carb. Just wondering if I should go with a return line and a pump that runs continuously or the single feed which turns on and off with pressure demands. Thoughts?

[303 Mopar]

I would suggest a return line and an in-tank pump.

[c00nhunterjoe]

I would contact msd and run whatever supply system they require. If they have no requirements, a return system will run cooler fuel.

[JR]

The single fuel lines are succeptable to fuel boiling, and the fuel pump over heating.

I'd HIGHLY suggest running the return line.

Also, having a pulsing fuel pump vs. a continuous one isn't necessarily tied to what fuel line setup you're running. You could run a pulse width controlled fuel pump with a return line. (Which would ultimately make for the coolest fuel.) Just be sure your fuel pump supports pwc. Some of the cheaper Walbros don't support it.

[John_Kunkel]

MSD has an advisory on the use of a return line or not:

http://documents.msdperformance.com/2920_add.pdf