With the right turbo setup, good fuel management and proper tuning you could get 250+ whp out of your b16 (OEM honda internals) pretty easy and have it be reliable. 300whp should even be attainable. My buddy made 277whp @ 14 psi on his b16 with a junkyard T3 .60/.63 turbo. I'm sure his new sc61 will be making a lot more power and he won't have to run as much boost to get the same numbers. We can't really give you a specific "psi" you can run though because that depends on too many things like horsepower goals, size of the turbo, etc...