Bumpdate.
I'm making some interesting headway with further tuning.
The twin intake allows very high MAP readings at very part throttle. It can hit 96kpa at 20% throttle. This is a common theme among ITBs and is nothing new or shocking. I'm working on using this fact of life to my advantage with tuning. The advantage over ITBs with this setup is having longer runner length, a stable MAP signal for all cylinders, and relative mechanical simplicity. This makes tuning a little easier for me. However, the combination is so new, that there are no base maps for me with start with other than a stock map. The bugs are new, too.
I admit to fumbling through the dark just a little bit to find the right settings. I'm happy with the car, but perfection in the tune has been a little hard to come by. Compromise keeps rearing its ugly head. I have to drive the car like a complete wuss in traffic to avoid tickets. What works in lower gears doesn't work so well in higher gears. I have to work the throttle to get the most out of it. My friends and I agree it is like playing an acoustic Subaru instead of an electric Subaru.
N/A's are forgiving of mistakes but demanding of precision (until you run crazy compression, big cams, nitromethane, etc.) I've been hunting for that precision a little bit at a time, whittling away unnecessary bits. I've chased down a thermal bug that causes the idle to change with different weather. Mike has provided a few new tables for me to work with, like programming the IAC. I was working with the IAC tables before figuring out the thermal issue and addressing it physically.
So far so good. The noise gets to be a bit much at times, but I'm sleeping in the bed I made. It does make a quiet daily sound very, very nice. I would not have signed up for this if I thought it wouldn't work or wouldn't love it. I spend more time under the hood making improvements as opposed to mistakes or fixing problems. Less seasoned people would be bugging the hell out of a tuner over every little thing that I accept as simply part of life with this choice. The car would not even be running if I had not stayed on top of things and applied myself to finding the solutions needed.