What is the hole in the inlet of this turbo for? This is a VW badged T3
that is going on an AAZ engine. The turbo on the AAZ does not have a hole
in this location.
Pic at http://home.inreach.com/malexand/turbo400.jpg
  Kinda looks like a breather inlet.  A little small but it IS on the 
intake side of the compressor.
    Loren