I switched from a Revtech 4800kv motor to the new Trinity Zombie 4850. I don't race with any timing at all. I was testing out a HW 4700 once and dumped a bunch of timing in that thing. That was some big air.

I don't think it's necessary to use timing with a 4-pole if it's gear correctly. You might have to reduce the current or punch though for a lot of these motors to keep the heat and wheel spin in check.