2011 Mustang GT with 404whp, 335mm Hoosier A7s, and a really big wing and splitter. I crossed the scales at 3767 lb after this session (my minimum weight is 3753 lb).

The bump at the end of the carousel was clearly causing me problems, but surprisingly I was only losing ~0.2s compared to avoiding it. Otherwise, there are a few more tenths I found in other sessions, so a low 1:34 should be possible.