The line marked P-Norm is a calculated result using the air pressure and temp on the day. The Rollers are calibrated at 1000 mbar pressure and 20 deg C temp, this is how the true reading is higher than the actual gained. In other words the pressure was down and the temp up from the calibrated rollers.
The actual wheel power is not a calculated result and should therefor be a little higher, toward the 162 mark.
But yeh, it is a lot to loose, 47 BHP is a whack!!, If there is a way to reduce the loss, I'd be willing to try it.
