It could be a number of things that affect your time. You should be able to get into the 14s with a stock MS3. What kind of 60' times are you getting? What was the MPH of the runs? Does the car feel like its not running right?
60 time is 2.4 and my end mph was 89. and yea the car don't feel good i think i need it tuned with the mods. felt as if the powered died mid to high rpms. -_-