<VV> 4-carb question

[corvairduval at cox.net]

To quote somewhat from Bob Helt's book...

The secondary (H) carb's throttle plates are held closed by the accelerator
pump return springs. These are somewhat shorter and stiffer than the
regular accelerator pump return springs.

These springs shold be stiff enough to prevent the vacuum from opening the
throttle plate. 

Also, the throttle plate is somewhat balanced across the shaft, so vacuum
may pull somewhat evenly on both the opening and closing side of the
throttle plate when it is closed. But here I am just using SWAG.

There is no accelerator pump spring or throttle plate difference between 65
to 69 H carbs.

Frank DuVal

SWAG:  Scientific wild ass guess

Original Message:
-----------------
From: Chris & Bill Strickland lechevrier at earthlink.net
Date: Thu, 07 Jul 2011 10:43:58 -0700
To: virtualvairs at corvair.org
Subject: <VV> 4-carb question


Not to change the Subject, and ask a question about the cars, but ...

... does anyone know if the secondaries on a four carb motor can be 
sucked open by engine vacuum instead of being opened by the manual 1965 
linkage?  Would 66 be different?

Bill Strickland


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