Let me run this by you all. My dyno graph is plotted against mph instead of rpm.
The background information: 235/85/R16 tires (99.59" circumference), .69 O/D, 3.07 rears, and I'm arbitrarily saying the converter is 89% efficient .
The equations: (miles/hour)*(5280ft/mile)*(12in/ft)*(1rev/99.59in)*(1hr/60min)= wheel rpm
(wheel rpm)*(rear end ratio)*(O/D ratio)/(converter efficiency)=engine rpms
At 60 mph that's about 1515 rpm and every 20 mph is another 500 rpm.
Reasonable? By that math, 120 mph is right at 3000 rpm.
