More Aerodynamics.....

Have a look at the following links.... They could really help with the designing of your car.

http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-aerodynamics-k4.html

http://news.bbc.co.uk/sport2/hi/motorsport/formula_one/car_guide/3518461.stm

http://auto.howstuffworks.com/fuel-efficiency/fuel-economy/aerodynamics.htm