[SFfiredog]

Well, I guess it's my turn to throw
a monkey wrench into the whole thing. Chassis dynos, like flow benches are an excellent tuning aid for an individual,
but not so great for real world comparisons to other peoples cars or motors. I have done chassis dyno work and am here to tell you there are way too many variables, assumptions, and calculations to make to get accurate data. For example, I still have some connections at Ford testing division (actually most of it is done by Roush Racing Ent.) I have a '01 F-150 Lightning and was told, by the testers, that the drivetrain and parasitic loss is 11.2%. Yes, 11.2%. We tested a friends totally stock Lightning and it made 342 hp at the rear wheels. 11.2% of 342 is 38.3 342+38.3=380.3
hp at the flywheel. Guess what for rates the engine at: 380 hp. We raised the tire pressure from 33 psi to 45 psi and the power jumped to 351 rear wheel horsepower. 11.2 % of 351 is 39.3.
351+39.3= 390.1 flywheel hp. 10 hp just by adding air to the tire. The cheapest 10 hp on the planet! My Lightning made 390.2 at the rear wheels. At 11.2 % that = 433.9 at the flywheel.
I guess what I'm trying to say is there is so many variables involved that even with todays hi tech equipment we are still only making educated guesses.
IMHO,
--Mike