Would love any info on what exactly the tuner did. If mileage went up then it sounds like your leaner now. Seems like the S/C manufacturers' tunes are rich to avoid the risk of leaning out. How did your tuner conclude that you're getting boost at 1,600 rpm? I've been told by Magnuson that the bypass won't close unless the intake is at zero BAR which is WOT. Is he/she saying that at WOT boost comes on at 1,600? Great info.

There's a chance (small) that I'll keep my 3.6 on a stand with the S/C and tear it down to the rotating assembly and see how it looks after living half its life under forced induction. Then put it back together with any and all improvements I can and experiment with electromechanical bypass control on the S/C and a custom tune. All toward the end of finding a used 6-speed JK to build as light a truck as I can and have it be capable off road.