Ahh..! That was how BHP was explained to me, and I didn't know that rolling dynos are fluidic brakes. That makes sense. What I meant is the horsepower given at the wheels is not the same thing as BHP which is traditionally a measure at the flywheel. The difference between what the dyno tells you versus the measured horsepower at the flywheel is the amount of inefficiency from crank to the wheel. That's what I meant by dynos not being able to give you a true BHP measurement because every car is a little different, and the actual losses are not known.

Calvin