i'm sure the tune "works", but the improved launching is what got you the 12.7.
Yes the improved 60' time is a huge part of it, BUT last year, I had 26 passes at Empire Dragway (1/4 mile track 60 miles away) and over 30 passes at Dunn Tire Raceway Park (1/8 mile track 5 miles away), so I assure you the low RPM bog launch and go method that yielded my best times both last year and this year were done the same. The difference again is that now the car instantly stands up and goes vs. the delay that existed with the stock tune. I did not get some epiphany between last year and this year that taught me a new way to launch, nor have I taken any driving lessons.
I'm sure some of the credit can go to the other new mod I installed since last year, the Airaid CAI which I know you are a huge fan of based on your posts in other threads I've read, but last year, I would have absolutely killed for a 12.XX time slip, especially after seeing all these A5 392 owners getting into the low 12's. No matter how I tried, I never came close. I am not a believer in butt-dyno's even though the first ride I took in my car after the PCM swap showed me instantly that the removal or TQ management changed the whole feel in a positive way, I still feel the only true validation is Track or Dyno.....period. There are other members and former members on this forum who know what I ran last year and what I ran last night because these individuals were at the track and witnessed it. Had I gone to the track once or twice last year and got in a half dozen runs, then your argument would make sense. But in reality, last year I tried every single combination of traction control settings and high and low RPM launches possible.
I have no personal interest whatsoever in pushing the B&G tune, except to share my personal experiences with the members of this community. Remember, I posted a couple days ago my first impressions, and promised I would go to the track and report my results and I would have done so whether they were good or bad. I spent almost 1400.00 for a cat back system that sounds awesome but did almost nothing for me at the track, so I'm happy about a mod that cost hundreds, not thousands that actually made a difference for me. The day I pulled out of the dealership with my brand new 392 Challenger back on 4/16/11, I had no doubt in my mind I was driving a 12 second car. I of course came to find out I was wrong then, but now I am driving a 12 second car.
Again, I stand by RB's estimate of up to 4/10's in the 1/4 only because I've lived it. Maybe the rest was because of the Airaid, who knows? Bottom line is with the exception of a very expensive PCM swap, we 2011 and 2012 owners whether they have a 5.7 or a 392 have no other options as far as a tune. Sure, I like everyone would love a hand held unit and a custom tune, but right now I am grateful for the canned tune available to us.