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Re: Wastegate Diaphram??

> For the wastegate to fail in a way that would cause low boost it would
> require the diaphragm to get weak and respond more quickly to the intake
> manifold pressure ... which I would consider to be an unlikely occurrence.
> I suppose another mechanism where the WG could fail to cause low boost would
> be if it did not close completely ... but this would not be the fault of the
> diaphragm. 

Just a minor data point, by the time I unloaded my 83 5kt, the wastegate
was "stuck open".  Nice low compression normally aspirated sled it was,
too.  It had spent some time "stuck shut" previously, which was just as
big of a pita, couldn't give it any gas or the boost would peg out.

Huw Powell

(soon to be) http://www.humanspeakers.com

82 Audi Coupe; 84 4kq; 85 Coupe GT