That is old news and you are reinventing the wheel a bit. Only thing different is you ate taking a non Nissan specific box and mating to a Nissan. Not that difficult.
Is there any way of changing the color of search keywords after you do a search? Maybe I'm missing it but everytime i search and click on a thread the words I searched for are in light gray....real...
Or the issue could be with your injector battery offset, as you put more load on the alt the voltage can drop an u will use a different cell in your injector battery offset table..
Based on my research when building the branch resonator, I believe the straight through mufflers are what is causing the bass-y drone. You could have resonators instead of every inch of straight p...
Side branch resonator worked acceptably well at the speed it was tuned for (65ish mph):
http://img.photobucket.com/albums/v511/neonmike22/SE-R/P7220429sm.jpg