"Blue" wastegate spring

[Phil@isham-research.demon.co.uk (Phil Payne)]

In message <Pine.SOL.3.96.980223103858.18174B-100000@iris.nyit.edu> Sachelle Babbar writes:

> Mine is a factory blue spring. I guess on my car (a kh) it could mean
> stock @1.5 bar.It's got a dap of blue paint on it's bottom (or top). I
> don't know if that's the answer your looking for.

Shouldn't your 'stock' be 1.6 bar?

The parts fiche doesn't go to component level.  The part number for the
ur-quattro wastegate is always 034 145 705, with a suffix:

   A  - MB
   T  - WR
   AA - WX

I would expect the MB to have a weaker wastegate spring than the WR.
Firstly because boost is lower (1.6 vs 1.7 bar) and secondly because
the ECU can 'help out' by dropping some boost on top of the diaphragm.

Likewise, I would expect a MAC11 MC engine to have a weaker spring
than prior turbo engines.  Any confirmation?

--
 Phil Payne
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