BMW seems to make our cars with lots of differences.
Maybe BMW gave me some super secret stuff.
I've won enough TTOD autoX to know how the tires are working, and I TELL YOU that turning off traction control turns off the E-diff making one rear spin wildly or turns feel numb.
I never said that All Seasons should be used on track, and don't like or have anywhere.
My X1 came with Pirelli P7 SUMMERS, and if you listen at end of straight of COTA, you'll hear tires chirp on braking and turning.
I see you have 3 very nice Bimmers with lots power parts, but I'm not doing free parts testing, just making most of what I drive.
Anybody can be hard on parts; my goal is to drive fast without burning them up.
Once more; I go to HPDE for FUN, and I don't wanna race. Someone always being slick and adding more stuff which comes back to: "It's all apples and oranges"!
https://youtu.be/Hsgk2aqpY6U