garret T3 w/ 60 trim on 5s comp map, be gentle Options

[b1gr3d]

ok for a few hours I have been looking at compressor maps and messing with a few performance programs. my results have founf that on a garret t3 with 60 trim

now my calculations on paper and with a calc say the red line and the perfomance calc say the blue line.
calculations:
CFM=LxRPMxVExPr/5660 = 2.2x3500x90x1.54/5660 = 188.55cfm or 12.82lb/min
CFM=LxRPMxVExPr/5660 = 2.2x6300x90x1.54/5660 = 339.398cfm or 23.088lb/min
Pr=14.7+BOOST/14.7 = 14.7+8/14.7 = 1.54

program says that my air flow rate at 3500 is 21.58lbs/min and at 6300 it is 38.85lbs/min the Pr says 1.55

what is my problem? am i right or is the comp? and am i wasting my time with this turbo in the first place??

This post has been edited by b1gr3d: Jun 25, 2006 - 10:39 AM