Originally Posted by PencilGeek
On a motor dyno, all power runs are performed at full throttle. You apply more load to the motor until the RPM reduces to the desired measurement point (2000, 3000, 4000, etc.). Once the RPM is at the desired location, you take the TQ/HP measurement and store it. Change the load, to the next desired RPM, take another reading. Continue this process through the entire RPM range until you find max HP; go a little beyond that...and call it a day. Since HP is a direct function of TQ and RPM, there's no point in pushing the motor much beyond the point where you found max HP.
That seems to be the description of a steady-state test. How long would that normally take? Not sure if they did that here. Note the acceleration time of 5.8 sec noted at the bottom of the sheet?