bear in mind that relatively few racing games "natively" support the 360 pad in that very few have rumble support and dead zones set correctly. From memory the following applies. Gold = native support out of the box, no messing, silver = limited support, may need tweaking, bronze = heavy tweaking and/or no rumble.
Gold:- Grid, Dirt, Flatout UC, Sega Rally Evo, Fuel
Silver:- NFSS, NFSUC, Trackmania (dont think rumble works)
Bronze:- all the Simbin titles, earlier NFS games. TDU (though some people claim to have rumble working). Earlier ToCA games
Feel free to add/correct.