Just a small word of warning!
The above post mentions the "Inferno setup page." Do not use these setups as is, or you will be off the track more that on it!!!!!
These sets are tweaked to within an inch of their lives!! Really fast but very unstable. You will need to add downforce, take off some camber, maybe change the gears a bit because you changed the downforce. And on and on and on....
If you really want to get faster gradually. Which is what I think you we're asking. Learn the lines of the tracks. The new feature that lets you see the racing line (#4) is a great learning tool.
Don't use the fastest set! Use a really stable set that lets you drive the racing line nice and smooth. You will go faster and faster almost every lap,
and you will be faster than almost all the guys that download the Inferno sets!!
Drop by the [HR] servers sometime for some good racing and we will share some sets as well.
Hope this helps and happy racing.