I think LFS has the right physics to test the F1 upside down myth. I found this video in youtube where you can see the downforce working right, lifting the car, when it's upside down.
http://www.youtube.com/watch?v=3ASdpOtFtfg
Will be cool to have a tunnel like this one in LFS to test it http://www.youtube.com/watch?v=oHDojzNA8gs
http://www.youtube.com/watch?v=3ASdpOtFtfg
Will be cool to have a tunnel like this one in LFS to test it http://www.youtube.com/watch?v=oHDojzNA8gs