With my seats, stereo (12"s), and all the other BS out of my car I ran a 15.2, you should at least see a 15.5.
But it's a ways to the gas station from the track so I could never go with real low gas tank.
Just to let you know, I tried a lot of different launches and around 3,000 was the best times. If I tried at 4,000+ rpm's it would really bog down right off the line. Just play with it, it might have been best at lower than 3,000, it's hard to try to watch your rpm's and the light at the same time, maybe try 2,000 and work your way up.
Oh and show up early and let it cool down before you start and once you get the hang of it let it cool again and try. With a hot engine I would run .4-.5 slower.