CIS

[Phil Payne]

> do other cars (old Porsche, MB, BMW) with CIS have have the same or similar
> problems as the Audi turbos?  If not, why?  Is it due to the high operating
> temps of the turbo engines?  Just curious.

In general they don't.  The way the I5 is canted over, the fact that the 10V is not a
cross-flow design, and some poor engine bay layout on top of all that make this a major (IMO)
Audi weakness.

The non-crossflow design was beneficial in the old carburettor I5s, especially with the old
bimetal strip autochoke - the inlet manifold warmed up very quickly.  Unfortunately with the
turbos it just kept on warming up.

--
  Phil Payne
  http://www.isham-research.com/quattro
  +44 7785 302 803
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