I love the 'Ring, but for timed laps. I always try to get as close if not better to the IRL times marked on the 'Ring. I basically have set myself up with PP brackets (400 - 499) in which I then have standard cars (no tuning) and tuned cars. I then take them around the ring and set times. The first clean lap with the car is then the timed lap.
The Nismo '14 IRL did a 7:08 and I did a 7:04...
I've done about 1000 miles round the ring the past couple of months.