Who has the fastest /6 here

I have before and no one has said anything about having a slant with one. Ball bearing supported shafts, instead of bushings. Ultra light impellers for quick spool up. Just look at any diesel performance site. Those are the type turbos I am talking about. Properly sized, of course.

Already using a modern DBB turbo with improved impeller technology. It's been on SS.O for quite a while now.