My stage 5 did 13.4 my first time at track. I had 2.4-2.7 60'ers. I could grip anything. A lot of practice turned that same car into 12.7 and with tires and upping boost to 17 psi and a little tuning of AFC that was a 12.3@116mph. The difference is all driver. I have friends in stage 3's that can get less than 13.9 which some people believe a stock Z will do.
"Is it any wonder why men are so confused? Women spend so much time f@#king with our minds, we have to think with our d*#ks."