Where do you have your boost gauge T'd into? I can't see how a stock turbo can produce that much boost unless there is a restriction someplace. I've heard many people say that even with the wastegate completely block off it can't produce much more than 24psi with stock cam and open dump. I verified this myself by blocking my wastegate off completely and opened the dump and all it produced was 24psi (running alchy) and this is with a stock cam. You have a larger cam thus flowing more air so even less restriction thus less boost pressure to read.
IMO, this may be telling me that the stock IC is a restriction in your system so putting a larger turbo in front of it will not get you the gains that it could if the system is free flowing. With all that said I believe that a larger turbo will make a bit more power than just an IC but the IC will be a huge restriction at those boost levels with a larger turbo.
ks
