This Evo I worked on only had 17psi boost from the factory (tested with Autometer boost gauge). So I cranked it up to 19psi. Some of the boys on the Lancer forum are running 26psi with stock long blocks. Seems a bit high for a full time street car though.
What I was getting at before, by asking the question that some of you may think is BEYOND rookie, is that yes, I realize that MAF measures incoming air and all that, but when you get high boost psi in the intake fighting against the fuel line psi, then do you guys need to put on of those return line variable shutoff valves that boost the line pressure in the fuel rail so as to counteract the lean condition that exists, since the vacuum actuated fuel pressure regulator can only compensate for vacuum and not accomodate boost. Does this make sense to any of you? What comes in the turbo kits to correct this problem that only occurs during open loop operation? Or does the fuel trim automatically compensate for that?
Also, I'd like to thank the ones of you who gave me some very useful info. Any others just trying to piss on me can just go find a tree and hump it