Seems like you have ruled out IAT issues.
I would agree with that conclusion. I have an ESS TS2 kit and while I haven't done as many track days as you, I have done many many mountain runs, autox's, and track days. I also run an MS45 ecu and have not had any issues.
Only thing that stood out recently for me was last time I changed plugs they were completely worn down, which I don't recall happening last time I changed plugs.
But everything is 100% operational. You do have the w/a injection which I am not a fan of. If it were to fail, could cause an issue with fuel mixture and timing.
Oil temps seem a bit on the high side. I don't think my oil temp has gone on the other side of 250 degrees.
I've also had the supercharger on since around 2008 and put over 70,000 miles on it. Car is currently at 120,000 miles.
2004 330Ci 6 Speed; UUC Sway Bars; Powerflex RTAB's and FCAB's; KW V2 Coilovers; 3.38 OS Giken LSD
Z4 Finned Diff Cover; Headers; M-Tech II Rear Bumper and CF Diffusor; CF Trunk; CSL Front Bumper
M3 CF Hood; DICE I-Pod Kit; JTD Rear Shock Mounts; UUC Front Strut Bar; O2 Simulators
ESS TS2 Twin Screw Supercharger
Last edited by Minnoe07; 10-31-2012 at 09:49 PM.