Hey, I have an 2010 M8 with a stage 2 Cutler turbo. I ran it this weekend for the first time at elevation, and had a bog right at 4000 rpm, or just after it engaged. I am not overly experienced with 2 stroike turbos, and i could not get rid of the bog even after I adjusted the attitude box. Could this be turbo lag or clutching? I changed the plugs, and the clutching,weights etc. came from Cutler? Any info would help. Thanks