Just for some fun we tested my car with the "dynolicious" program on craigs iphone.
The car was sitting on 10-11psi then after 6 500 rpm it would creep up and sit at 17psi pretty stable. It spat out 188kw atw peak.
That would be occurring around 6.5k -7k anyway so that would be on 17psi.
We were trying to do quarter miles runs but the stutter box would set it off with the vibration, and the time would start a second or two early so meant nothing.
Dunno how accurate it is but i was some fun.