Top speed in level flight would depend on top RPM and pitch. I would say the speeds you are saying are too high.
In level flight through the pattern, I am at around 5/8 ths throttle which is about 4500 rpm. The pitch is 10", so doing the calculations speed is around 70 kmh.
Doing the calculations using my set up, ie. 7200 rpm, 10" pitch, top speed would be 110 kmh.
Last edited by drac1; 10-13-2014 at 02:51 AM.