I haven't seen anyone put 30psi on their turbo, and if they did, i'd doubt 400hp. That turbo gets upgraded with Stage 2 mopar kit, and it's not out yet. Neither is the TurboXS stuff to upgrade it. I have, however, seen a 129.00 TurboXS boost controller push the engine to 260whp and 290wtrq.
BTW, most SRT's will place between 217-229whp. Mine pulled 221 SAE corrected, completely stock.