<VV> Pinging Problem Re: 62 and 63 YH carb differences?

[FrankCB at aol.com]

Mark,
 
Have you checked just how MUCH retard the "boost-retard" unit is  
supplying?  You can do it without driving the car by just running the  engine after 
disconnecting and plugging the rubber hose "boost" line and  attaching a 
rubber hose to the boost-retard on the side of the  distributor.  Apply low air 
pressure up to 10 psig to the line while  checking with a timing light to 
see just how much boost-retard you're  getting.  Compare that number to the 
specs in the factory manual for your  year.  
I also recommend reading the Turbocharger chapter in the Corvair Basics  
Manual available from CORSA for a more detailed discussion.
 
Let us know what you find.
 
The "other Frank"
(Frank Burkhard)
Boonton, NJ 07005
 
 
In a message dated 5/5/2011 12:11:03 A.M. Eastern Daylight Time,  
corvairduval at cox.net writes:

Pay  attention to total advance, not just initial setting, which may now 
be  different with the boost/retard vacuum unit. Others here who have 
used  them should chime in. Like the "other" Frank.

Frank DuVal

On  5/4/2011 8:36 PM, Markpowhatan at aol.com wrote:
> I just noticed that my  63 Spyder has a 62 YH carb on it (body # 0-1507)
> with a 63 compressor  housing with PCV.  After having a complete engine
> rebuild, I now  have some pinging when in boost, and thats with High 
octane gas,
> and a  new "boost-retard" that is working.  What's the difference between 
  the
> 62 and 63 YH carb bodies?  I see that when ordering rods and  jets,  there
> is some difference.  I am trying to go richer  as a last effort to  stop 
the
> ping, and plan to order another rod  and jet to see if that helps.  Any
> suggestions?   Thanks!  Mark Francis   63 Spyder   Powhatan,  Va.