Out of fuel? Options

[JMoushon]

So, I retract the statement that the exhaust made huge power, and replace it with this: The exhaust made huge power in the mid-range, but now, boost creep makes me run out of fuel on the top-end. I had to turn my MBC from 19-20 down to 12 just so I can run all the way through second gear without boosting past 20 psi and detonating. If I leave the boost turned up, I have HUGE midrange, ripping tires clear through 2nd, but I can't stay in it past 5500. Setup is: 14b, Walbro 255 with factory wiring, freemods, 3" dp and side exit, MBC. Would a fuel pump rewire flow enough to compensate, or are my injectors maxed? Also, is it the fact that I am running a factory o2 housing that is causing the boost creep? I'm pissed. If I turn the boost down enough to actually get to 7000, my car is slower than it was with a stock dp and 2.5 pressbent. Help!?