OK, I'm awake now.
If we were running at 3250 rpm, on the run I spoke of, then the actual vehicle speed, (in referance to the axle rotation,) is 78.00585 mph.
Orthopod, speedometers do lie, but if mine only lies 5 mph at 80, that's not too bad. I was running 225/45/17s that day, and most days when there is no snow. So if you factor the tires, AaHA! 78.351008 mph! well, that explaines it then!
Orthopod, how do you like the way it drives, now?
93, I have some tuning to do.
and i'm under a little pressure to get things done
. It sounds like a super meet
and I'm charged up for it
Johnny, 7000 rpm,0.78 overdrive, 4.11 to one rears,=2183.5423 axle rpm, gives 161.49098 theoretical mph.
So. 4000 rpm should be 92.2804 mph.
Johnny, if your engine were actually turning 3750 rpm, ( you did say close to 4000 rpm) that would put your speed at 86.512875, so IF your spedometer read 5 mph low, like mine reads 5 mph high.....
Can you run a few miles down the highway at 60 mph, or 75 mph, with a stopwatch and see if your speedometer is incorrect?