PVFJR, thanks that makes things much more complicated. Yes they are 8.25/20
I had just done several 2 way runs on a marked 2 mile stretch of road for odometer calculation and got an offset of exactly 1.50 to 1. That makes the indicated 75 mph which I was running on another straight road actually 50 mph, which was the posted speed and I was running with the flow of traffic.
If I take the 67 mph I was indicating at 3500 and divide it by 1.5 I get 44.6, Which is what it felt like with the cars riding on my bumper.
