Yes many have done 12's with the stock turbo, have a look at the stage 1 tuning guide on my webpage that will give you enough power. Then you just need a some good tyres and some good driving.
Best ive managed was at Heathcoute on a 32 degree day, with a grinding 4th gear sincro, and it was only my second time drag racing.
195rwkw @ 10 psi
13.6 @ 105mph
2.2 second 60 ft
Was using 235/45/17 hankook K104's with Sydneykids groupbuy suspension.
Im confident that the car easily has the power to do a 12 I just need a better setup maybe a cooler day. MT ET radials 255/50/16, install stock springs but retain bilstein shocks.
cheers