My favorite configuration is a Mamba Max controller and a Tekin 448 sensorless motor.
I ran one successfully in my XXT-CR last season, tried it and liked it in my XXX mid motor conversion and ordered another motor just for it.
In my XX4 I used a Mamba Max controller an a castle creation 4600KV motor - controller works great but motor a bit too strong, so I may get a 448 for it too.
Ran a Novak GTB with 7.5 motor on my XXX-CR last season, performed ok, but a bit too much power and requires very sensetive and accurate throttle work.
I've seen many guys loose a race because of problem with sensor/sensor wires/thermal shutdown with sensored systems and rarely if ever with a sensorless setup.
To be fair, I didn't like the performance of my 7.5 turn sensored motors with my sensorless controllers.
In my opinion, performance wise, it's not so much a quesion of one type of system being better than the other, rather getting a motor that is right for the track and driving style and a controller that fits it.
Reliability wise, sensorless simply has less things that can go wrong.
Avner.
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