You're doing fine, and yes, your car has a 13-second pass in it. I'm sure traction is a slight issue, so work more on your launch. I always tried to launch close to 2000 RPM's, and after the car got rolling good, then I hammered it. There'll always be some spin, but get yourself some drag radials, and you've got yourself your 13-second timeslip. Good luck man.
I had one 2.1 60' and it was on the 14.1 pass, the rest were 2.3's. I didn't change the tire pressure at all, and was running on stock tires. I found the best way to launch was at like 1700 with a slight slip and as soon as the tires hook, ram it. The problem was the track was an ice rink by the end of the day, my buddy with an 02 LS1 was only able to pull a 13.8 on the day. There was a bullit there that was running 14.3's all day, so the track wasn't in the best condition. I would love to see that 13 second slip.
Times seem pretty good to me. 1300 miles and running like that seems right. I would guess your 60' times were in the 2.17 area on the 14.14 run? Hell, I ran 100.50 mph and still ran a 14.0. I'd say you are doing good Let the car cool down, knock that 60' down to, say, a 2.08 or so and you'll run a 13.
The small burnout on the stock tired does a lot! I know street tires you arent supposed to, but when i spin them a bit my 60' is always better, went from consistant 2.2-2.25's to about 2.08-2.15, gets the dirt and what not off. i pulled a 13.76 @100.5, 2.08 60', you can do it, it takes practice, took me 15 passes, now i run 13.8's consistantly, 13.9 if my 60' isnt too good, keep at it.
Sounds pretty good to me. I did 14.7 @ 97 some with 700 miles on the car completelly stock (granny shifting). Traction seemed to be the biggest issue to me so I went for some wider 10.5" rears. 2.08 60 foot time on a 50 degree day where drizzle was on and off. I also picked up the VRS X-pipe, steeeda springs, and a K&N to hope and get 13s out of it.