2013 San Diego National Tour

[why?]

Originally Posted by NJ Drive

Nice pick up Jason!

For those who don't know, Andy Hollis' latest tests prove that sunroof-optioned cars are quicker in a straight line. The vacuum effect created by the air moving past the open roof actually induces lift, which reduces tire rolling resistance, which allows the car to accelerate faster.

That isn't surprising, and if you really wanted to you could create a spoiler on top to do the same thing. But i doubt you could make it effective enough to see any results at autocross speeds unless it was ridiculously aggressive.

Although you could make it adjustable, and have all sorts of fun figuring out what is the best effective setting for limiting drag and maximizing handling at the same time.