Dave,
If you turn 2400 rpm, your speed should be about the same, maybe exactly the same as if a C-85 or C-75 were turning the same prop the same rpm. If you move through the air faster without changing the airframe, you'll need to expend more fuel. If you are willing to burn the fuel, you can get cruise speed improvement from spinning the engine faster. Your climb with the C-85/O-200-crank engine should climb better and owners report significantly better climb (though I'm always skeptical of self-reported improvements. The Kinney wheel pants haven't been reported to provide much if any speed improvement as they were designed without benefit of aerodynamic software or wind tunnel. Mark Huesden installed a new windshield that has a much milder slope, extending forward almost to the fuel cap. He's done some other things I can't itemize. Ed
