Re: Wastegate Port / Control

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Tue, 22 Aug 1995, Robert D. Houk wrote:

> That's exactly what I'm trying now -- running manifold boost through
> air pressure regulator to wastegate "atmospheric reference" port...
> Instant Dial-a-Boost aka Der ShrapnelKnobben...once I get the bloody
> ECU to quit shutting the engine off!!!
Robert,

	I have this setup on my 5KCSTQ right now, and it is holding 
pretty well at 8.5psi, just below the ECU cutoff threshold.  
Occasionally, if the system gets really efficient, the boost willl creep 
over 9psi, and WHAM, the ECU shuts off.  I hate that!  Passengers think 
the car is dying!
	I had to fiddle with the regulator quite a bit to tune it to the 
range that we are seeing in the manifold.  I bought a bunch of springs at 
the local hardware store, and played with the regulator spring rate and 
free length.

Later,									
Graydon D. Stuckey								
graydon@apollo.gmi.edu								
'86 Audi 5000 CS Turbo Quattro, GDS Racing Stage 1
'83 Mazda RX7 w/13B, GDS Racing Stage 58474