heff17

iTrader: (2)

Ok im swapping a truck 5.3 into my 71 c10 and getting all of the fuel system ironed out. I want to run the corvette style filter/regulator so i dont have to have a long return line back to the fuel cell but my truck engine has the return style fuel rail. My question is what is the easiest way to accomplish this? Can i run the corvette style filter/regulator to the inlet of the fuel rail and then plug the fuel return? or should i swap the fuel rail with one that is a return-less fuel rail?
Thanks for the help.

cyipher

iTrader: (1)

You can plug the return port with an efi fitting and an cap or even install a gauge there.

heff17

iTrader: (2)

Great idea. Thanks.

01ssreda4

iTrader: (96)

Are you talking about the port on the back of the regulator that's mounted to the fuel rail? That's not a return line to my knowledge, that's a vacuum port. The tunes run a straight fuel pressure reading for the injectors and the regulator varies fuel pressure via vacuum. On a sealed regulator (car) setup, the fuel pressure is fixed and the injector data is offset via the MAP sensor reading.

garys 68

iTrader: (1)

You can find a later non-return rail pretty cheap and easy. All stainless flex fuel rails are non return. Or there's always aftermarket ones.
I'm not sure what the regulator will do if you deadhead that line.

01ssreda4

iTrader: (96)

This thread may help:

https://ls1tech.com/forums/pcm-diagn...es-change.html

heff17

iTrader: (2)

I understand in the stock configuration that the fuel regulator gets a vacuum feed to determine the correct fuel pressure. what i was thinking about doing was capping that vacuum port and running a plug instead of a return line. and have the fuel filter do the regulating. Would that mess anything up?

01ssreda4

iTrader: (96)

Yes you would need to make sure the tune correlates with your setup, thats my point.