20c 4s lipo or 30c 3s lipo??

[suicideneil]

Low kv & high voltage is always the best way to achieve better temps, and with a speed run machine, you could spin the motors somewhat faster than the usual 30-40k, more like upto 50-55k or so (one of the Castle guys, Joe I think, ran his 2650kv motor on 6s lipo in his TC to get about 90-100mph).

Since this isnt an MT though, I wont be much further use- sounds though like the neu was spinning rather abit faster than it liked for it to get hot. I wouldnt run less than 4s though for speed runs, lots of current being pulled during acceleration so a higher C rating would be best to spare the batts and esc.