I did some logging today and here are both runs. You can watch the MAF go all the way up to 5 Volts. I guess with Sasha's kit its just moving that much air at 12-13PSI? There is nothing in the tune that would lower the MAF voltage.
You can see it maxes out at 4500rpm (which is crazy low). I pulled both MAFs and they had some oil on them but I cleaned them and reinstalled them. I have no idea how you guys are running higher boost on a stock maf with 2.75" boost tubes.