Nice mod focituner! Sounds like a bit o' work and funds, but I am sure you are appreciating the DSI more and more as time goes on.
Homegrown, the major difference you are probably going to see is that your car will pull steadily to redline, whereas before you start to loose that pull but your rpms are still climbing. Thats where the runners in the dual stage intake come into play. Its optimizing your air current to better suit the rpm range you are in.
Stock on SVT tune, the runners switched over around 6500 or so, with Waynes tune and probably others, it will switch over at 5k. You can even hear the difference in the engine tone when it switches over. Its nice having that extra oomph up high, believe me.
..:: sleestak ::..
"Our mother of blessed accelleration, dont fail us now!" -- Elwood Blues