especially the end of the video when the spoiler comes up
below is an amazing one of someone demoing the aero of the race car USING ONLY A SINGLE GARAGE STYLE FAN AND SMOKE!!
see 0:40-0:52 u see it turn on look at 3:58 you will see it turn off
a fan this size can be purchased used easily... the trick is to find the right spot to perform the tests on our aeromods....
http://www.youtube.com/watch?feature...&v=jYaIXWNOa_A