Take a Vbox to the track next time and analyze the data.
We did a Vbox run on a ESS M3 down here, but he had a passenger and spare wheels inside the car and trapped 115.3. So with 200 lbs less weight, perhaps his trap would have been identical to yours? But his was a 13.3 et, with a 2.5 60' time. So just goes to show, there is so many variables in a qtr mile run.
2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2015 i3 Terra
2008 Black 335i Sedan. 11.11@ 129.47 mph
2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph (N54 stock turbo trap speed WR)
60-130mph: 6.95 seconds stock turbo WR (.16% slope)