This is in my rustler. Motor is a medusa 50mm 1600kv and a 6S 4000mah dymond. Second is a medusa 50mm 2200kv with an airthunder 5000mah 4S.
Same gearing and speed within 2mph of each other. The 6S runs longer and has cooler temps.....just thought I'd post the graphs.
http://s521.photobucket.com/albums/w...ent=6Sbash.jpg
http://s521.photobucket.com/albums/w...ent=4Sbash.jpg