I have better luck with a 1512 1400kv then a 1515 2700kv motor in the gtp. My gtp pulls 2000w peak, but its more controlable with the smaller motor.
6 KiloWatt A123 Racer
GTP-Pletty Big Maxximum+RX8. GTP-C50-6L Hacker+RX8. CRT.5-Pro4+ZTW esc.
24s2p EVG SX 49.6mph Ebike.
18s4p Raptor 60mph Ebike. 11.5KW