I understand. I am not thinking of changing the basic engine specs, just cleaning up the junk left behind by manufacture. Like cleaning out casting flash from the ports, matching the ports so there are no sharp edges (between the cases and cylinder) and trimming the base gasket to match the ports instead of sticking out into them. I am not interested in raising the peak torque rpm point, just shifting the entire curve upwards a bit. This is just basic blueprinting and is free horsepower with no effect on the general engine behavior. I certainly don't want a nasty, tempermental high rpm motor that is no good for weekend flying.

Any experiences with how much improvement to expect?


Thanks,
Mark