No problem, glad to help.

I journeyed to Mike's in Dallas today to buy the pinion gear(s) I needed. I ran the 19T on their medium-sized outdoor track with the Tekin 2050 on 4S. Timing was at 0, Low starting power, 30% punch control, linear throttle/brake curves. I had a little too much top end, so I cut my radio's EPA down to 85%. Unfortunately, before I could finish the run, the motor mount screws came loose. Picked up some 4mm screws to replace them. What's worse is that the motor came off the track at 180dF. Some of that heat can be attributed to the loosening of the motor causing tight gear mesh, but not much. I stopped running it as soon as I heard the wrong gear noises. The ESC's fan was on, and the fins inside were at 140dF. I didn't measure the LiPo (a Turnigy 5Ah 25C), but it felt like about 100dF. I have a couple things I need to do to improve cooling, though. I run a Punisher body with no holes yet cut. I also received a 40mm fan and Integy heat sink with the motor, but it doesn't hold onto the motor very tightly at all. I would rather not use a fan on my motor. I wish I would have remembered to record how long the run lasted, but I was having too much fun driving the thing at a real track. (I live two hours away from Mike's )

So, I bought a 17T pinion to try next time. Most of the guys there run 3S in their buggies. One guy who might be on here, Ron Fleck, was there with his Mugen MBX6 w/RCM conversion, running a Tekin RX8/T8 2250kV combo with a Venom 3S 6.4Ah. That motor came off a 10-minute run on the indoor track at 140dF. He said he liked the bigger truggy motor because it helped to counterbalance the car from side to side. He was running a 17T pinion with the stock spur. Forgive me for rambling; I'm bored.