1988 BMW E30 325is 
Stock M20, H&R Race, B&B exhaust, Dunlop Drizza 205/50/15 (very close to being worn out)
Lap times:
1) 2.18.67 (yellow/warm-up)
2) 1.46.97 (clear track)
3) 1.48.93 (traffic)
4) 1.45.15 (clear track)
5) 1.46.38 (clear track)
6) 1.45.96 (clear track)
7) 1.44.61 (clear track)
8) 1.44.57 (clear track - best time)
9) 1.47.40 (traffic)
10) 1.44.65 (clear track)
11) 1.49.88 (traffic)
12) 1.48.45 (traffic)
13) 1.48.50 (cool down lap)

I went back and forth between downshifting into 3rd at turn 7 leading into the "octopus" complex, or staying in 4th through that section. Lap times were nearly identical either way...