Re: Simple-minded turbocharger ruminations ...

[steveb@newkla.kla.com (Steven Buchholz)]

> 
> On Mar 6, 10:34am, Dan Bocek wrote:
> > Subject: Re: Simple-minded turbocharger ruminations ...
> >
> > Note that this will also
> > have the effect of advancing your timing across the board, since the
> > computer uses manifold pressure as a guage of engine load, so be careful
> > if you try this yourself.
> >-- End of excerpt from Dan Bocek
> 
> 	I guess that's what I was missing then ... to do it right, one
> 	would have to adjust the timing advance to compensate : presumably
> 	the IA chip does this.  How's the timing advanced, by the way?  Could
> 	that be adjusted in an "analog" way perhaps?
> 
> 	What about other gotchas? Anything else the manifold pressure
> 	influences via the engine management computer?
> 
> 	-Arun
> 

The one issue that is not being discussed here is that the computer is also 
in control of the ignition timing ... messing around with the boost info to 
the computer may cause it to select inappropriate timing.  I know people have 
performed this modification and have gotten acceptable results, but it would 
probably be better to have a chip that was aware of the true situation.  

At the internet quattro get together on Saturday Tomas Kasan had a '83TQC 
that had a chip he bought from someplace in Canada.  I'm trying to get more 
information, but Tomas said that it was put together by someone who raced 
TQCs.  I wonder if this chip would be applicable to 5000Ts as well.

Steve Buchholz
s_buchho@kla.com