got it installed
impressions:
much louder in vacuum conditions
increased rumble
much better manners
hard to get out of vac
not too slow on 10psi. Obviously the small was quicker at post 18psi levels, but the evo3 really shines as it reaches 20psi.
will be doing some road tuning tomorrow. fwiw the targeted afr for 12psi on the small was 11.4, and for the evo3, it was like 12.3. BAD. I only did that for a reference point of course.