My best was 14.7. The temperature was about 90 degress with 90% humidity. My first was a 15.2. I forgot to turn off the A/C (stupid). I have a Borla catback and a Blitz SUS intake. I am launching at 3,000 rpm. I just don't have the guts to launch at 5,000 rpm.
I kept it in third both runs. Next time I will shift and see what happens. I figured a shift would cost me a tenth or so.