It depends on how you drive you might get 10-15 min runtimes if I where you I would run 3s 2p if you can. By doing so you would get almost twice the runtime.

for under $100 you can get the 700 HO kershaw motors and run 40-45mph all day long with the right batts

http://www.kershawdesigns.com/

look under products then emaxx then 700 ho

speed runs = no
bashing and racing = yes