g_mkoch and Earl and all,
Thanks for sharing the experience.
I found that increasing the timing from 4 degree to 8 for my 1513 Neu motor can eliminate the commutation error. However, the motor seems running a little bit hot with the setting.
I also found that the same problem never happens with Jeti Spin 99 ESC, even at 97º F summer temperature.
Last edited by nonstoprc; 06-19-2016 at 01:04 PM.