Will a teardrop shaped pinewood derby car be fast?

Answer 1

No, although aerodynamically speaking it is the best shape for the car, the aerodynamics playing a role on such a small object travelling at such low velocities doesn't really matter. The key factor is the weight in this case. a teardrop design will put the majority of the vehicles weight up front, when you want as much as possible in the farthest back position on a standard track. Hope this helps in your design.