[hootie7159]

Lower kv+ higher voltage = longer runtimes and more efficiency (less heat).... But that depends on your gearing as well...I'm looking to do this exact same thing, I currently run an rc8t on 4s 30c 5000 mah flightmax on the 2200kv MMM combo (42mph on large track 15-20 min run time and ok temps...I have to have a cool down period after back to back packs) but I'm switching to 5s 4500 mah lipos and 1700kv motor for longer runtimes and less heat...but this is all because of the possibility of having 20min+ qual's and mains......