I've played for 4 or so hours yesterday. I'm still at level 46, but I just bought and fully modded a McLaren F1. Pretty intense car that I need to fine tune. My eyes are bloodshot from staring into the TV for that long, it's pretty bad. Haha.
BTW, I bought a MkV GTI yesterday and did all of the suspension, brakes, clutch, flywheel, tranny, weight, wings, and only did ignition for the engine to keep it in C class.
According to the management system, the engine revs to 7500rpm and hits 8psi max and holds 8psi all the way to 7500. I wish that was the case in real life with just ignition stuff. More like hits 13, drops to 7 or so at 6500+ when stock. About 10-11psi Stg 2.