Re: Wastegate Port / Control

[glen.powell@smc.com]

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  In fact Audi uses this very same "port" to support CPU control of
  boost levels on 5000 TQs, etc. It should be open to the atmosphere
  on the ur-Q. Unfortunately, controlling/increasing boost by applying
  pressure via this port will still require modification of the CPU to
  prevent
  protective shutdown.

  -glen

I see a vacuum port to the upper side of the wastegate on my TQC.
It is open to the atmosphere.  The car runns great.  Should there
be a hose to this port?  If it is unused, it offers an alternative
to wastegate springs as a boost controling mechanism.  A fertile
mind could easily do control via manifold pressure modulation.
I know some OEM applications that do electronic boost control via
this method.

Paul Timmerman


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