[Vwdiesel] Is it weird oil pressure?

[LBaird119 at aol.com]

  I can't see any way the turbo bearings could be at fault, especially 
considering 
thay you swapped turbos with no change.  If turbo bearings are THAT sloppy, 
the impeller would hit the housing.  Same goes for if the turbo thrust washer 

were worn much.  A fair amount of oil does go through the turbo, I'd guess 
about 1/3 of the flow but for it to change under gain in boost doesn't add 
up.  
If the pressure didn't come back up after reaching max boost then I'd say 
maybe they were heavily grooved or such but then that'd suck the pressure 
heavily at idle.
  The Dasher has boost and pressure gauges and oil pressure was oil 
pressure.  It changed with rpm only but nothing related to boost.  Now 
if cylinder pressure was somehow getting into the head's oiling then 
MAYBE the bubbles induced would drop the oil pressure to the gauge 
until they passed through the lifters or cam bearings.  Can't think of a 
way it could do it from the manifold only though, other than through the 
turbo seal but then oil consumption should be heavy.  Same with 
combustion chamber induced air.  Very strange.
     Loren