240rwhp sounds incredibly low for your setup, even with 12psi. My car (R34GTT), with a 3" turbo-back exhaust, Blitz FMIC, factory turbo & untuned ECU is seeing 245rwhp (182.7rwkw), peaking 8psi in the mid-range, and 7psi by peak power (factory boost control). Got more than a few people surprised (This was on an SAU:SA dyno day, on what people say is an accurately reading dyno)