The car did have plenty of time to learn - a couple hundred miles at least, not including the 80 miles to the track.
Putting in headers might be a future project for me, but according to Intense'* website, you should be able run the package I have w/o headers - I'm similar to package #2 except I'm only running a 3.5 pulley. On top of that, the headers really come in handy in the higher rpm band when you are pumping air at a higher rate. The car feels flat mostly in the idle to 3500rpm range, then seems to pick up a bit. I'm still wondering if the PCM is the culprit. Other than doing scans, I don't have a program or the know how to know what else is going on with the PCM, but here are some more facts: I drove to the track from a cold area and about 20 or so miles crossed a front where it was 20 degrees warmer and more humid compared to where I drove from. Is it possible the PCM would not be able to have adjusted quickly enough for optimum performance? Another fact: driving home, during at least the first half of the trip, the car was burning much more fuel in cruise than on the way to the track. So again, did the PCM now readjust the heavy acceleration at the track and take 50 miles to adjust back to cruise mode? Doesn't seem like it should take that long - my stock PCM never behaved like that.