I think Mrphotoman is right on with the supporting mods idea. I went to the MIR shootout and was not running as fast as guys with smaller pulleys. My best time was a 12.48 compared to 12.27's run by people with smaller pulleys. While I believe their updated tunes played a role, I don't think I would have run much faster than them had I did had a newer tune. All that added heat is the problem when you are boosting that high.