Originally Posted by
theclutch
Wow, I didn't know that the motor loses timing with rpm...
It doesn't. Fixed timing on the endbell is exactly that: fixed.
ESCs have the advantage that they can vary the timing with motor speed; the faster the speed, the more the timing is advanced. That's called, depending on the manufacturer, "dynamic timing", "boost timing", or "ramping". The result is a wider motor powerband than fixed timing gives.