Not for the purists, but has anyone looked into curing the 1M's asthma above 5500 rpm with some bigger turbos?
It seems some interesting options have become available in the past year such as Rob Beck Turbos (RB Turbos) and ASR, some of which would be visually indistinguishable from stock, but do unleash the beast. It looks like ~450 at the wheels is available boost only, pump gas, in the 15-16 psi boost range.
http://www.e90post.com/forums/showthread.php?t=480025
Which makes me think... Are there any differences between our cars and other N54s that would be roadblocks to doing this? Other than the obvious potential reduction in the collector value of the car, of course.
Thoughts? I did a search and didn't see any mention of RB turbos here, and I was a bit surprised given the seeming giant-killing potential...