When I was stock, I was able to run 12.9's at Memphis (2.0s 60', DA unknown), but that was between 65-70 degree weather and fairly new Bridgestone RE960AS's. If it was 70+ on stock, it was low 13's no matter how hard I tried. Mind you I have yet to break below 2.0s on my 60'. It is possible, but you need favorable conditions to get to the 12's.
Drag Times has an app (even for mobiles) to calculate the DA:
http://www.dragtimes.com/da-density...set=29.88&rh=79&submitButtonName=Calculate+DA
After elevation, the rest is basically gathered from local weather information. I'm sure there are probably better apps on the Android and iPhone market as well.
I find this to be the most accurate DA site out there...
http://airdensityonline.com/tracks/





