Quote:
Originally Posted by Blueclyde
I think you general premise here is correct. It is somewhat simplified but I think sound in principle.
We are also forgetting about the dynos themselves. There is a lot that goes into maintaining and operating a dyno properly. I have little experience with chassis dynos but am involved with a lot of engine testing on engine dynos. Who is to say these chassis dynos are even properly maintained and calibrated. There are so many variables with these chassis dynos. I am very skeptical of them. They are only good for delta comparisons.
The only numbers I really believe are the crankshaft power numbers that come from Ford and GM, in terms of these two cars. Those numbers are correct.
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Yes, a chassis dyno is a tuning tool, nothing more. I suspect the method for measuring output used by a dyno becomes increasingly imprecise as power increases as well, but I'm unsure. And again, my example is largely oversimplified and only serves to better explain the principle idea.