The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Corvette Regulator with a stock 5.3 return line Fuel rail

LS short box · 09-08-2020, 09:12 PM

So my .02 and I may be all wet. If can find a good way to plug the return side of the fuel rail that seems like a good way and least expensive way to go. If you use the C5 FPR and use it's return port back to the tank the fuel rail will only see 58 psi. The PCM has no clue what the fuel pressure is and doesn't care as long it's 58 psi.
Not knowing the year of you 5.3 I think the injectors stay the same for a number of years but after 2006? the injectors changed because the electrical connectors changed and the length of the injectors?
Check with the folks over on LS1tech. I'm sure they can help.

09-08-2020, 09:12 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,922	Re: Corvette Regulator with a stock 5.3 return line Fuel rail So my .02 and I may be all wet. If can find a good way to plug the return side of the fuel rail that seems like a good way and least expensive way to go. If you use the C5 FPR and use it's return port back to the tank the fuel rail will only see 58 psi. The PCM has no clue what the fuel pressure is and doesn't care as long it's 58 psi. Not knowing the year of you 5.3 I think the injectors stay the same for a number of years but after 2006? the injectors changed because the electrical connectors changed and the length of the injectors? Check with the folks over on LS1tech. I'm sure they can help.