I flew my LongEz with an O-235 C2C for 1800 hours; rpm was highly dependent on the prop, air intake system, and exhaust system. Best prop I had (of four) was from Ted Hendrickson (now Rowbear), 62/60, I think, and I routinely saw 2500 at turnup, and cruised at 3000 rpm, both full throttle. A Great American was a little less on both ends. Also rpm is affected by location and type of aircleaner (firewall plans location is a little more restrictive than the ram air type.....some question about increased tendency for carb ice with the ram air type), type of exhaust....2 in 1 plans exhaust a little more restrictive than the four pipe one from Hunt. I've since upgraded to an O-320, and still have both props. Used, but in good shape. Cheap!