Originally Posted by
MikeFrazer
Getting a new 17.5 for my b4 and was wondering if a rotor would help with power and which one torque or rpm? I race indoor clay 100x60 track
the stock rotor is 12.5mm It's already more torque than most of the other motors. They usually come with 12.3mm rotors. We do have a 12.3 and a 12.0 so you can fine tune for each track / layout. We also have a 12.8, which is even more torque.
Personally I ran the 12.5 (stock) rotor with 34/69 gearing when I ran the B4.2 Timing on the endbell is at 45 deg. ESC Settings 100% punch, 5000mhz pwm.