Ehm, guys? Now I may suggest something really stupid, but I am going to anyway. At our club we run a 10.5T motors and we change the timing until it runs very fast and way too hot. So, we add fans to the motor, some so many I fear the car will levitate. Now all this modifying does mean the cars run fast, moving through the air quickly. Hey... Has anyone tried to open the grill hole in the front of the body, make (3D print, maybe) a nice duct and lead the incoming air to the motor? I know this might require opening the rear a little more to let the air out again, but do you think / know it will work? Requiring no fans, no power taken from the battery? Maybe only a heat sink on the motor? Or a hole in the wind screen if we want to keep the front in tact for grip.
Cheers,
Hugo