The Evo motor is the easiest to start of all the motors I have. They are easy to adjust and have a good midrange. I have started using the 52. It will wind tighter than the 46. I am swinging a 11 x 7 prop with a Jett muffler on a 52 in my L A Racer. Haven't checked Rpm's but it screams. I think I have 15 or more of the Evo motors. Have a 61 in a twist 60 swinging a 14 x 4 sport prop. It does excellent also.