SHELBY GT 350 Member
Joined: Jan 2011
Location: Central Massachusetts
The graph is screwed up, the RPM's are wrong in one of the two runs; I can't quite decypher which one. You basically need to shift one curve to the left so it lines up at the beginning, or vice vesa.
That's pretty confusing; I did not realize it works that way; I thought the RPM data was engine RPM taken from the RPM lead so you should be able to overlay the two runs correctly. I don't know how you can back-calculate the engine RPM from rear wheel RPM unless you plug in the tire size and gear ratios, and I don't think they do any of that when you do a dyno run. I know for sure they did not ask for any of that information when I had my car dynoed. I've tried to think this math through a few times without success.
| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day