cool man I tested mine and got 13lb of thrust with a 18-8 top flite power point prop. I am unaware of the rpm but judging from sound it is about 7000. I tach it with a 17-8 prop and got 7800 rpm. Like I said before not sure just how accurate my fish scale is. I just recently aquired a 32 cc mac with no carb any idea what carb is best used on those motors and where can I get them with the carb insulator .