Forza 3 Downforce?

[Daston]

Hey guys,

Any idea on how downforce is calculated is it in direct proportion to speed?

Reason I ask is I am having problems using LMP1 cars. For example my pug is quite happy on one track (cant think of its name but was the demo track from forza 2). However if I drive at Silverstone it understeers, oversteers and wheelspins out of bends.

Is this down to one being a fast track so loads of downforce and the other is lots of tight bends where its mechanical grip (or lack of)