SP
Hello Guys, My son Austin ran the SP 4.5 and the 10.5 today on a fast big track.Ran 4.5 with same FDR and ESC settings, new CS 27 the same for all 3 motors. 4.5 was overall much Faster than are other mod motors we ran. The 10.5 was just fast. Blows out all other 10.5 in my opinion. We tested 4different type of 10.5 motors. PW setup, EP 4600, All in All great propuct. Thanks Ron Harrison,