What he said was that a stock T3 cannot flow enough to sustain 17psi of boost, that it was well beyond what the compressor map of a T3 was designed for and that i needed a turbo with a greater flow ratio and recommended a Stage 2 T3, he then went on to explain that it would flow more air at the same PSI and produce more power (something between 200 and 220bhp) and less heat, where as trying to get more out of my T3 would just create huge temperatures and as a result less dense air, less flow, with almost no increase in boost.

All of that is exactly what happens when you reach the limit of a turbo, but everyone on here says that 17psi should not be the limit of a T3 and I think they are right!