Same E46 M3, a little lighter than stock, stock power/driveline, coilovers, missing a little camber in the rear due to a bent trailing arm, but balanced; Hankook RS4s.
First session after lunch; I just finished chasing a quick guy in an E36 racecar, then I slowed down to relax myself and the car and waited for my friend in his 911S. When I found him, I let him by and then figured I'd follow for a bit and see how he was doing since he was running about 7 seconds slower than I. I caught up to him, but before long I found I couldn't quite keep up! I was thinking, "WHAT did he have for lunch!?" After a lap or two I just couldn't keep up and started falling back, and after five or six laps I saw him pit in, so I took a cool down and came in just to get my head back. When I pulled in I saw my friend's car still out there on track, and the car I saw pull in was sitting in the paddock - a GT3 with a different dude getting out of it. Figured out what happened! Yeesh.
Lots of craziness, and somehow my predictive best was a 1:22.64 - this certainly wasn't my cleanest lap, and I was trying things all day long, but 4 seconds is a lifetime on track.