<VV> Spark Delay Valve - yay or nay?

[Sethracer at aol.com]

In a message dated 1/13/2008 8:50:14 PM Pacific Standard Time, ronh at owt.com  
writes:

Apparently they were commonly used as both forward delay valves and  reverse 
delay valves, depending on the drivability problem.  I  believe that the 
Corvair application would be the forward delay valve in  which case the black 
or red side is toward the vacuum source  (carburetor).
RonH




I don't know why you would want to delay the return to zero on the Corvair.  
(not saying your suggestion does, RonH.) I think the logical way to do it  
would be to test it (sucks, huh?) then install it so the restriction - the  side 
that you can hold a vacuum on - for a while - is fed to the distributor.  The 
side that lets the air pass through easily to, should be to the carb feed.  
Note that this may be - (very likely, in my experience) backwards from the way  
it is marked. You should be able to test it easily enough - on a running 
engine  - one way slows the advance application, the other doesn't. Note also that 
you  may not need this. It is used as another tool to combat the need for 
"real"  premium gasoline, which is no longer available. If your car runs at full 
advance  with no pinging (and no valve installed) -  Chuck the valve onto  the 
shelf! - Seth 



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