CIS question

[drew at scirocco.cs.uoguelph.ca (Drew MacPherson)]

I believe that the port you're referring to is an atmospheric port, not a 
manifold vacuum port.

Audi Turbo motors running CIS had WUR's with intake manifold ports that 
allowed the WUR (or more accurately CPR) to enrichen the mixture by 
lowering control pressure under boost.

The presence of a capped port on the later CPR's may have been for
altitude compensation, but I don't have my Bosch book here at work to be
sure.

Drew




On Wed, 2 Jul 2003 Wolfsbrg8v@aol.com wrote:

> 
> I noticed that on my control pressure regulator, 
> besides the two fuel lines attached, there is a 
> vacuum port which has been capped.  From what 
> I understand, some CPRs enriched the mixture 
> in response to manifold vacuum, and I'd like to 
> experiment with this. 
> 
> My question is, where do I run a vacuum line from,
> to attach to this port?  I'm thinking from the same
> line that runs from throttle body to distributor, or
> maybe from the intake manifold .. ?
> 
> Leo
> late 84 8v
> 
> 
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