Configuration: brake stock (broken, tires Michelin sportcup2, spring Eibach prokit, sway bar Competition Package, engine stock with speed limit 268km/h, many traffic, second lap with M5.
I think that under optimal conditions, the M5 so configured, it can run in 7'45" on the official lap (20,6km), I just have to increase the camber front and find the right pads.