<VV> Pressuere retard

FrankCB frankcb at aol.com
Sun Sep 20 23:15:32 EDT 2009

     Adding to the good advice from Seth, use only a few psi of air pressure (10 is the max).  I've used a "Mighty Vac" and also a home air compressor with the outlet pressure controlled to 10 psi.  But you have to seal off the air pressure that you put in to make sure that the diaphragm doesn't leak which would be indicated by the pressure dropping.
     You can learn more about turbo Corvairs from the Turbo Chapter of the CORSA Corvair Basics Manual.
     Frank Burkhard

In a message dated 09/20/09 20:24:11 Eastern Daylight Time, Sethracer writes:
In a message dated 9/20/2009 5:34:26 A.M. Pacific Daylight Time,   
corvairguy2 at yahoo.com writes: 

I have a problem with my spyder 
.. Gas keeps gettig  into the vacuum retard. Anyone have an answer for my 
Also is there  a way to test it to see if it is working? 

Chuck - The Pressure retard is hooked directly to the right side manifold.   
If the diaphragm inside is broken or cracked somehow, boost in the engine 
would  send air and fuel into the unit, as it tries to escape to the 
atmosphere instead  of heading into the combustion chamber. 

You should be able to test it - after removal, not really hard to do, by   
applying some air to the nipple and see if the lever pushes out.  If you  are 
able to do that with an air source and keep air inside, like by shutting 
off  a valve, the lever should stay extended. If it retracts with the air at a 
fixed pressure, the diaphragm is leaking and the unit should be replaced. 
You  might be able to do this on the car, space is tight in that area. 

Seth  Emerson 

More information about the VirtualVairs mailing list