sensorless motors cannot use timing boost and turbo functions. you will have to gear it like normal.
So for best performance for stock racing, you will need to use sensored motors.
ching can u teach me how to set esc for speed passion. the factory setting has a very loud sound turbo or start punch crazy sound. and the second vedio i change the start punch to smooth but looks like no turbo. do u have any video about stock race turbo kick in? i heard when the turbo kick in it can go up to 1XXXXKV with good setting. http://www.youtube.com/watch?v=T69aek4-oCk http://www.youtube.com/watch?v=JFyvfpZVfzc
Set item #4 (DDRS) less than 7, the Boost/Turbo function will not kick in. So set #4 to 7, 8 or 9. I think it was a BUG in the software.
You can control the amount of 'punch' using #15 instead.
I also suggest you try the motor with a load. (At least install the pinion and mount it to a car). that way it is easier to see the result. also with a unloaded motor, your rotor may get damaged... I broke mine before.
BTW, I have a HW, not speed passion. but i assume they are similar.