Originally Posted by stressdoc
What is so "wild" about BMW R&D having multiple engine versions? They always do. Most obviously never make it to market. Second point, if you have people that you know inside BMW you don't name them. Third point, I don't write about stuff here unless it's already out, in this case Michael (Mapezzul) discussed N55 variants on his blog.
What's the blog address of Mapezzul ? He seems very knowledgeable...