What Chris said about 3/Ses is all true. A twin turbo 3/S will hit high 12s with BPU. In other words with stock turbos and stock fuel. The great thing is they are very reliable and headache free at this level. The bad thing is it get very expensive and a lot of headaches to take it to the next level.
As far as us racing... Us locals have been doing 1/4 mile since before Rock Falls even had Import days. See:
http://mn3s.org/drag-times.html (and I haven't even updated that page in over two years)
later,
Curt