Hers the deal, my scan tool doesnt read the MAF in voltage it reads it in LBS/Min. Can anyone tell me if my MAF readings are ok? I usually get around 56-58 Lbs/Min under WOT. Can Anyone help convert that or help out? Thanks Jamie
Well 57 lb/min at 5000 RPM is right for 185% combined VE. That would calculate to be approxmately 12 psi of boost corrected to STD atmosphere, NOT GUAGE PRESSURE IN THE CAR. Guage pressure is a function of the heated air from blower inefficiency and intercooler effectiveness. The higher you spin the blower the higher the inefficiency, power gain is much less and dash bord guage pressure gets higher.
With a correctly calibrated MAF voltage/mass air are directly related. With voltage output from a MAF calibrated it should be .5-4.90 volts from below idle to slightly past WOT peak rpm.
As an example idle 500 RPM 3 lb/min = .500 v, WOT 7000 RPM 80 lb/min = 4.8 v
I hope this helps.
For more in car tuning help with this see Joe at JD's Performance 215-938-9270 or post to his forum here.