Originally Posted by old_dude

A little fill in from testing. Yes the nes motors have lower IR readings and do show a bit more power. But the removal of the heat sinking compounds have caused gearing and timing changes that take back some of that power. This only applies to the 10.5 thru 21.5 motors the 25.5 just jumped from around 30 watts to 40 watts (at a 5v test). So once you get them right, they aren't much if any faster. I ran quicker with a G4R HT epoxy than a new G5 HT in WGTR. Simply because of heat control.

Originally Posted by OffRoadJunkie

I'm sure it's going to be a new stator as well. With the new lower IR readings, on the new motors, the old motors don't stand a much of a chance. The new motors are so much faster and more powerful.

Originally Posted by OffRoadJunkie

Yes, I have seen a difference in heat. Especially with the R1. I guess it would also depend on the type of racing. In offroad, too much timing or gearing will take out too much torque, so jumping and accelerating out of corners became a problem. I have seen most racers gear back down to regain torque. In these instances, the new motors were taking the lead.

Originally Posted by gigaplex

Over the weekend I borrowed a friends old V21 R1 21.5T while he used a V30R. He did not out-motor me.

I've also done some back to back testing of my G4R 13.5T against a G5, and lap times were the same.

I'm not convinced there's a big generational gap.