You'll get enough smoke to really get the green peace eco-nazi terrorists fired up and ready to pass more EPA legislation, that's for sure.
Smoke show can be used all the time. I haven't been able to test it out (hello, hello, is this thing on?

) but I would ASSUME it to be a roughly 100 HP tune with low boost fueling changes. All other driving conditions would warrant a "normal" 100 or so horsepower tune.