i would put in traxxas 12t titian motors two of them of corse i heard they are better than the losi stock motors and have more torque, i have the same box and the motors will burn up reguardless what u do espially if your engine wount start right away youfine with the 12vgell cell thats what i use thats prently u could use a heat gun to get it to start easier cause its getting cooler outside