Hey all, I've got 16 years of electric R/C racing under my belt, hopefully my insight into this question helps. 6.5 and 6 1/2 turn motors are the same. The mechanics of how electric motors work is somewhat complex, not to offend anyone but it's like asking how a 4 stroke car engine functions when you have never seen one. Basically, the more turns the more torque/less rpm (horsepower). A 6.5 turn motor (depending on other variables) is a screaming mother of an electric motor. Most racers running non-brushless motors run 10 to 12 turn motors. Heck, back years ago fast motors ran 16-18 turns. I don't want to be whipping a dead horse here, but I hope I am starting to illustrate my point. Anyway, I realize this is off-topic for this forum (nitro). I can go on for hours about electric stuff, PM me if you want me to bore you to death. Race On!