Turbo COupes wieght aroun 3650 I believe. They can be very fast if you tune them right, I have seen some in the 11's but with the 2.3 in those cars it doesn't get too much faster than that without major cash. Umm some sites to check out would be
www.turbocoupe.org and
www.turboford.org I had an 86 it was a very nice car and was pretty quick. But don't expect it to be reliable in the least bit, something new broke every week.