Quote:
Originally Posted by LS short box
The PCM has no clue what the fuel pressure is and doesn't care as long it's 58 psi.
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True, to an extent, however, the fuel maps are different between a set 58psi and a vacuum regulated 58psi. so you need to adjust for it in the tune for it to be right. That said, the vacuum regulated return style is actually a better system, but the corvette set 58psi is just a little simpler. If you already have a return rail, i would just run it that way and use the cheaper filter. If you insist on going returnless. do yourself a favor and just grab a returnless set of rails from the junkyard and skip trying to plug off the return line. I know people do it, but its just a potential spot for trouble in my opinion.