I went to the FLAT OUT classic at heartland Park this past weekend.
The track surface has been completely repaved with fresh asphalt and it is city street smooth !
I had left my 1M at home due to weather concerns and a failing charge pipe. The fresh asphalt had me wanting to check out the course so I took my stock X1 M with M sport package out on track in the instructor session a couple of times. Attached is the second of two full sessions I ran during the weekend.
It's on Michelin AS3+ tires which did admirably based on the abuse they were taking. They are an excellent tire in the snow when new as well.
With the simple addition of Max performance tires... I feel like the X1 can hold it's own with the likes of E36 M3... E46 ZHP... 128/135... etc on track..
video overlays and data are courtesy of the M performance Drive Analyzer Application for the iphone.