Here is the efficiency map of the M62 Im using..

Calculations so I know how much boost I will be making:

Crank Pulley Circumferance = cm 12.446 - 4.9"

S/C Pulley Circumferance = cm -6.60 - 2.6"

Ratio = 1.885 / 1 = 1.885

@ 6500 rpm = 12,257 S/C rpm

M62 supercharger output capacity = 1 L/ rpm = 12,257 L

(LPM*.03531 = CFM) = 432 CFM of air

2.5 engine can inhale 252.6 CFM of air

Excess air = 432 – 252.6 = 180 “boosted” CFM

Boost = excess CFM / normal CFM * atmospheric pressure

180 / 252.6 * 14.7 = 10.5 PSI pounds boost

So I should be getting around 9-10 PSI of intercooled boost.