[Vwdiesel] Is it weird oil pressure?

[Mark Shepherd]

 >Have you tried disconnecting the hose from the turbo to
the manifold
>and driving it that way?  Just divert the boosted air and
drive it NA for a
> couple blocks even with no air filter.  That would
eliminate any boost
>to the manifold and back pressure in the turbo. :-)
 > Asked a friend about this and he's thinking it's more
likely rpm related
>and just happens to coincide with boost.
     Loren

Are we talking crank rpm?
I think its somehow linked to turbo bearing rotation...
MTM(UK)