serge760,
Just curious, what's the AUW of your Bobcat with that .91? As someone mentioned earlier that while this plane does move out with the right combination, it really isn't an all out speed platform for glow. I'm sure the fixed landing gear is robbing some speed. A turbine and retracts seems to be the only way to go ballistic with this plane. I'll be plenty happy if mine does 75-80 with an OS .55AX