I use a Speed Passion 13.5t with the cranked up. I also use an Orion Vortex Pro, along with Orion 1s batteries. I would not recommend this motor though. Yes it is the quickest Supastox on the track, but the motor plugs (not soldered) come out in impact and can end your race. Maintenance is constantly required because of this. Go with a Thunder Power 13.5t, turn the timing up and stick a 1S high spec battery in and you will be quick, very quick!
As for setup, what tyres do you guys run, springs and what hop ups do you use?
Sam