Thanks guys for the useful info.
@bigad4x4: Does your car with NMS mapping do 23PSI all the way through the revs even at 6000rpm in fourth gear?
all depends what gear your in at the time and what speed and what revs
it peaks at 28psi and by the time its at 6000-7200 rpm it will hold 23psi in
every gear as it should buddy, does yours drop off at high revs?