When comparing my "Boost in PSI" PID to my "Manifold Gauge Pressure" I do see a delta.What RPM? I know Boostkings was hitting 55.7 at 6000 rpm and said it was 19psi.
I wonder if these trucks compensate for altitude when spitting out the boost or if its always referenced from 14.7 psi. This is why I like MAP, there is no confusion about what is happening
EDIT: I just looked at a log.
Boost in PSI = 20.01psi
Manifold Gauge Pressure (INHG) = 45.10 x .491154 is 22.15psi.