good thread dave. I didn't see anything wrong with your calculations zac but nevertheless, I suck at math. I don't know what's good or bad nor do I know if I calculated this correctly. As zac did, I used Dave's VE and IM temp #'s. I wanna do more reading on this... interesting.

T04E Specs:
3" INLET DIAMETER
2" OUTLET
JOURNAL BEARINGS
.57 COMPRESSOR WHEEL TRIM
.50 A/R COMPRESSOR
.63 A/R TURBINE

Pressure Ratio:
(16+14.7) / 13.7 = 2.241

Airflow:
350 x 12 x (.55 / 60) = 38.5 lbs/min

Calculated Mani Pressure:
(38.5 x 639.6 x 590) / (.98 x 3500 x 122.04)
14528514 / 418597.2 = 34.71
34.71 - 14.7 = 20.01 psig boost @7000 RPM

Compressor Discharge Pressure:
34.71 + 2 = 36.71 psia

Compressor Inlet Pressure:
14.7 - 1 = 13.7 psia

Pressure Ratio:
36.71 / 13.7 = 2.68

Airflow Actual
(34.71 x .98 x 1750 x 122.04) / (639.6 x 590)
7264754.406 / 377364 = 19.25 lbs/min @3500 RPM