I want to use brushless for my line follower.
The problem is most ESCs don't accept more than 400-500 updates/s due to the characteristic of steering signal.
Is there a way to overcome this with a custom flash or am I out of luck?
The thing i was looking for turned out to be the KISS ESC: http://flyduino.net/KISS-ESC-2-4S-18A-v11_1
It has an update speed of op to 2000Hz due to it's own control method called oneshot125.
Here are some off the shelf ESCs which claim to give 400Hz + update rate
Normally SimonK firmware should give you some scope to play around for your requirements. You can refer following links