Manual tranmission I assume. What was the temp and humidity? I can't help with the launch, as my automatic wont rev past 1500 while holding the brake down, but at the same time I was still able to pull of a 2.057 60, and a 13.369 quarter, temp was mid to high 40's though, I have a thread you can read all the details:
1/4 mile results inside.
But 13.8 does seem high. How many miles on the car?