<VV> 4-carb question

[Jim Allen Sr.]

The 65 second design and 66 thru 69 linkage had the lockout feature, to keep 
the secondarys from opening till the engine was up to temp.
   The lockouts were operated by the automatic choke linkage.
       Jim Allen Sr
----- Original Message ----- 
From: "Chris & Bill Strickland" <lechevrier at earthlink.net>
To: "Bryan Blackwell" <bryan at skiblack.com>
Cc: <virtualvairs at corvair.org>
Sent: Thursday, July 07, 2011 4:07 PM
Subject: 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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