StrangeQ: Uchiha_Cycliste: I'm with you on all points. It's fake, ad uses centripetal force ( to an extent) I was taught that a car's spoilers, on real cars with real spoilers, create a downward that helps the car stick to the ground. Further, that without the spoilers, a car's rear end would fly u ...

Partially. Spoilers do only become effective above certain speeds, usually high speeds, and a truly functional one will then begin to apply additional force down on the back of the car to help maintain traction. The thing is, you gotta be going at a pretty good clip for them to start having an effect, and really their primary purpose is for rear-wheel driven cars at autocross events where you're trying to negotiate lots of turns at speed. Without a spoiler your rear-end isn't going to just lift up off the ground, unless you have some really wierd aerodynamics going on or you're going really damn fast, like 150mph+ fast, and then it's still more that imperfections in the road will cause instabilities that will be amplified by your speed and cause loss of control; the additional force provided by the spoiler gives more traction and helps to mitigate those instabilities.

But in no case will a spoiler or front and rear diffusers provide enough force to stick a car to the ground while inverted; the physics just isn't there. To do that you would pretty much have to integrate an inverted wing design into the entire body of the car, but even then I have my doubts if you would be able to generate enough. Would be cool to see someone try though.

You really don't know what you are talking about. You don't need a crazy inverted wing design. You want proof? Saleen S7 above 150mph.