[othello]

Great to hear that your setup even handles 12s A123. Your 1515 (1100kv) should hit around 40000rpm at this voltage (36-37V under load at full speed on concrete). Did you check your motor temperature after this run? Do you have some eagletree data of this run? I do not wonder that there is more speed potential in your HV setup. Besides ballooning of your tires and handling i think the next limiting factor would be the 1p configuration of your A123, then your ESC and only then your motor. But who needs 45mph anyway. It's a good feeling though that your setup can manage it without any issues. Others probably would have dealt with heat issues when trying to do this on 4 or 5s.

I would have loved to get a motor with a KV of around 1100. But the lowest Neu 1512 has a KV of 1400. This is why i saw rpm spikes between 42000-44000rpm in my buggy. Even if the Neu 1512 seems to do well at those rpm levels i think it would even run cooler when staying below 40000 rpm (but i don't want to run it on 8 or 9s A123 cells). I also had the impression that the motor feels torquier between 0 to 3/4 of its rpm range and then it becomes less and less (which would correspond to the typical torque curve of an electric motor). But i guess this is quite normal as air drag becomes more and more an issue at higher speeds, thus slowing down your acceleration more and more.

As soon as i have sorted out my pinion problem i will post some data and a new video with ET Data of my new truggy.