58PSI at 0 psi of boost, and ~70ish at boost
. My stock system was droppign into the 36-40 range stock. Now even with my Areomotive 340 my fuel pressure sits at an even 52-53PSI (I hooked it up to a 1:1 with a vac/boost source).
I drilled out my venturi as well.
I was very close to building my bottom end till I started to realize the only way I would really get to use it is if I was running race fuel or E85. I am pushing our 94 octane about as far as Ill ever get it, I mean you could lower the compression but I love the responsiveness of the engine out of boost and I wouldn't want to lose that. This kit now has 25,000miles on it and is still going strong.