<VV> Secondary Carbs

[BBRT]

In addition to Harry and Grant's comments, a helpful item is to lightly 
bottom the idle mixture screw so no fuel goes thru, make sure the linkage is 
adjusted so you do not get air past the throttle plates. Since you have idle 
circuits in the primaries used as secondaries, if there is too high an idle 
rpm, or air rushing past the edge of the "closed" 'secondary',  you will get 
into what is called the transition or progression region. This allows 
fuel/air to pass out the slot in the throat of the carb right about where 
the throttle plate is, near the idle port-where the needle sticks thru. This 
fuel is drawn from the idle passageway (only in primary carbs). This makes 
the car run faster and then carb synch and everything else a pain.

Chuck S
BBRT
----- Original Message ----- 
From: "Harry Yarnell" <hyarnell1 at earthlink.net>
To: "Rich Purtell" <rpurtell1 at comcast.net>; <virtualvairs at corvair.org>
Sent: Friday, October 26, 2007 6:54 PM
Subject: Re: <VV> Secondary Carbs


> Really nothing. The secondaries didn't have chokes nor accerator pumps, 
> but some folks put pumps in them anyway.
>
> harry yarnell
> perryman garage and orphanage
> hyarnell1 at earthlink.net
> ----- Original Message ----- 
> From: "Rich Purtell" <rpurtell1 at comcast.net>
> To: <virtualvairs at corvair.org>
> Sent: Friday, October 26, 2007 6:32 PM
> Subject: <VV> Secondary Carbs
>
>
> I have a 1966 140 Corsa that has primary carbs all the way around (all 4). 
> What do I need to do  in the way of carb mods to use primaries in the 
> secondary positions.
> Rich
> 1966 Corsa 140 Convertible
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