Cranked it up a bit yesterday, the boost by gear doing work!
I think with proper tuning 14psi or so isn't out of the picture on 92-93 octane fuel. This should be about ~600whp or so on pump gas.
Couldn't do it before due to the clipping point of the stock mafs.
Fun little gimmick that I programmed in the ECU -- power estimate based on accelerate rate (of non driven tire, so no wheel sleep problems here). Obviously instantaneous accel is kind of "jittery", so you can factor it to "smooth" it, I'm using too much in this example, and it got a smoothed graph that looks nice, but very very low ball values compared to instant, hah.