My best is a 1:31 and change. I only get there when everything is going smoothly. I also try to go home in one piece which keeps me from getting too crazy.
I did a few track days at Barber Motorsports this past weekend. We were running 1:47's and possibly a 1:46 but I am not sure I believe my lap timer. What's funny is I felt like I was going pretty quickly but the ama guys do it in 1:25. Man, that is fast. That track is a blast. If you have the chance, you should try to ride it. 45' wide, smooth, technical, a lot like grattan ( the technical part that is LOL). It was an awesome experience.

Barber is 2.3 miles around.