I can't get my mind around over spinning... for it to over spin, that would also correspond to over boost. If you're still running 20-25 pounds of boost, the ECM will keep that in check (or the edge or whatever), no matter if you have a 2 inch pipe or a 10 inch pipe. Blade speed equates to boost. Now if you're pounding out 40 pounds of boost, then yeah, it might, but that's going to be the least of your worries...