Thinking of a new truck..

[RC-Monster Mike]

With enough 2400s, you could get a decent runtime. If you want 45mph out of 12 2400s, you won't get a lot of runtime! Some folks run gp2200s and get great runtimes. You just use a lot of them with a slower turning motor(use voltage instead of amperage for the power) and you get higher efficiency. 20 gp2200 cells weigh about the same as 14 3300 cells.