I think the $168 motor he is talking about has ceramic bearings, been shimmed, and ran on the dyno. Here is my take on it. Ceramic bearings in TC would be very hard to notice, in 12th scale it may take less then a second off your entire run. Being shimmed is good, as it will allow the motor to be free usually, but something most racers can do themselves. The dyno testing will get you a print out, and to the average racer it won't mean anything. And finally, if you have trinity motors now with a rotor you like, it will work in the Ion5/D4.
Franchise Racing Products * Fantom Racing * Pro One R/C Tires * RC America/Xray * Discount R/C Store * F1 R/C Lab * NORCAR @ The Gate