Ways to make your car faster through aerodynamics and weight placement:
A wedge
shape is simple and fairly aerodynamic. It is also a classic pinewood shape.
There are unlimited other shapes that can be fast also.
If allowed for your class, move your wheelbase as far
to the edges of the car as allowable for your race. This helps improve the cars tracking, limiting the number of times
the car can move back and forth in its lane.