I do not now believe what I wrote above.
The details I have access to for the Spec B transmissions that would be in my car and McDoof's car are....
For a Transmission code TY856WVBAA the gear ratios are stated as
1st....2nd....3rd....4th....5th....6th....Rev....T.R....F.D
3.636 2.235 1.521 1.137 0.971 0.756 3.545 1.100 3.900
The maths says that with 18 inch Spec-B wheels/tyres then at 150 kph the engine RPM would be about 5,500rpm.
I drove my car out tonight on the Hume Expressway and the 4th gear was only achieving abut 120kph at about 5,200 rpm.
Rechecking these numbers the alternative 4th Ratio for the 6MT of 1.346 is more consistent with what I observed in my car.
So I do not believe the published ratios?
The 4th gear ratio of 1.346 would be achieving over 6,500 RPM at the 150kph road speed indicated in McDoof's dynamometer printout. This is about where one would expect the H6 to be achieving maximum power.
So, presently, based upon my observations, I do not believe the published gear ratios.
Notwithstanding this analysis, the analysis above on wheel torque checks out.
About 150kph equates to about 1,240 to 1,250 wheel RPM or about 130 wheel radians per second.
163 kilowatts at 130 radians per second equates to about 1,250 wheel newton metres
The dynamometer output is showing about 625 units?
Still different by a factor of two?