Volumetric Efficiency

[5Toes]

so help me out here:

say I have a BMW 2.5 liter m50b25 and am boosting 10psi.. what would my CFM be?

[MF DOOM]

Been thinking about this more lately. Im heading back to wyo soon so the car will be at about 5200ft above sea level. So instead of using 14.7 i would use 12.27, correct?





Leaving this here because i did the math and dont want to lose it..

PR = 12.27 psi + 20 psi/ 12.27 psi = 2.63

(1.8 L x 2500 RPM x 90 VE x 2.63 )/5660 = 188.18 / 14.5 = 12.9lb/min

(1.8 L x 3500 RPM x 100 VE x 2.63 )/5660 = 292.73 = 20.1lb/min

(1.8 L x 6000 RPM x 110 VE x 2.63 )/5660 = 552.02 = 38lb/min


EDIT: Also, why do i see some maps that are plotted where the pr goes up and then yours where it stays flat?

EDIT:EDIT: I think i found my answer here but if anyone wants to clarify feel free.