God... Can it really be that hard to accept...? With the same rpm, same backpreassure and the same temperature, the flow and power is determined by the inlet manifold preassure. With the same rpm, same backpreassure and the same temperature, what in the world makes anybody belive the diameter of the compressor makes any difference??
Think it over, if you charge two identical engines with the same preassure at the same temperature. One got a T3 compressor, the other one got a 1meter aircraft-compressor... (that's what RSCosworth works with daily, I'm a mechanic, currently working with Audi's) Does anyone really belive those two engines will perform differently after spin-up??