[FC] <VV> Carburetor Heat System

[Rad Davis]

I've had the deflector plates on mine in every sort of weather and 
loading.  If they impair cooling, I've never observed it.  I mounted my 
electronic ignition to the one on the passenger side so that it would 
get plentiful cooling from the air in the duct.

Likewise, I've never had carb icing in the van.  By comparison, my '65 
coupe got it regularly in fall in NC until I restricted airflow into the 
compartment...

I can't regard the baffles as a bad thing - I'm sure that GM engineering 
sized the restricted openings sufficient to deal with the airflow demand 
of the engine.  Certainly the duct area is much larger than an Ultra 
Van's whose engine works a lot harder than most FCs.

Ken Hand wrote:
>  The baffles are only needed in cooler weather to keep the 40 degree air of a cool night from flowing across? the carbs and cooling them down just to keep carb ice from happening. They do decrease the air flow in the compartment slightly. Don't they block about30% of the opening? But, they are both right beside the carbs.
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> They are NOT for vapor lock only carb ice. Yes, they do control the air flow in the compartment, they keep the cold air off the carbs!
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> Ken Hand
> 248-613-8586
> www.corvairmechanic.com
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> -----Original Message-----
> From: Chris & Bill Strickland <lechevrier at earthlink.net>
> To: Dave Ziegler <dziegler3 at comcast.net>
> Cc: virtualvairs at corvair.org; lonzovair at aol.com; corvanatics at corvair.org
> Sent: Sun, Jul 12, 2009 9:36 pm
> Subject: Re: [FC] <VV> Carburetor Heat System
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> Dave Ziegler wrote:
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>> But, the FC's had removable plate in the sidewalls to increase or  
>> decrease cooling air flow. 
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> I am familiar with the engine compartment baffles, #3797594, same part 
> fits both sides on both FC's and wagons; however, I fail to see how it 
> affects cooling air flow in this manner, nor have I ever seen any oem 
> instructions as to it's function.  I am of the opinion that we have 
> simply considered that this must be it's purpose, without any supporting 
> documentation.
>
> I would certainly appreciate any reference to authoritative material 
> concerning the purpose of this "baffle".  I think it is more to control 
> the direction of the air flow, thus the name "baffle", but wonder 
> "Why?"  Noise issues do come to mind, but the baffles do come fitted to 
> the pick-ups, don't they?  Maybe they are an attempt to get cooler air 
> to circulate throughout the upper engine compartment  and to the fuel 
> pump area to help with vapor lock issues.  I just don't know.
>
> Wondering,
>
> Bill Strickland
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