A month ago when I ran a 12.7 @109 I was trying an 11.5 afr and 17* of timing and I got some KR but it was not my best run as the trap suffered a tad. I will try and go 17* of timing and see how it goes. I am really looking for another 12.3 or 12.2 pass in the next 3 weeks before the track closes.