<VV> Fwd: 4-carb question

[ScottyGrover at aol.com]

The question that arises in my mind is----why does he want to know?   I'm 
wondering whether the secondary carbs. can be vacuum-operated, using the  
same principle that Holley 4-bbl. carbs operate on.  
 
Scotty from Hollyweird
 
 
  
____________________________________
 From: lechevrier at earthlink.net
To: bryan at skiblack.com
CC:  virtualvairs at corvair.org
Sent: 7/7/2011 2:08:30 P.M. Pacific Daylight  Time
Subj: Re: <VV> 4-carb question


Bryan Blackwell wrote:

>The secondaries all have  stiffer return springs on them, I've never heard 
of them opening on just the  engine vacuum.
>

It would be my understanding that the 66 and  later linkages (I've never 
had a set of these) actually have a lockout  device to prevent the 
secondaries from opening until the primaries are  full open -- if the 
manifold vac doesn't open the secondaries, why would  this lockout be 
needed?  Likewise, why would GM have spent the money  to change the 
linkage?  The 65 linkage is apparently much simpler,  and it will open 
the secondaries.

The only oem return spring I'm  aware of on 65 secondaries is the one in 
the accelerator pump  hole.

Bill
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