<VV> RE: WC: Fuel Milage in winter - only minor Corvair

[Bob Gilbert]

Hi Merv,

That was my thinking too. The denser air should lead to a denser fuel
air/charge but anecdotal evidence suggests that mileage decreases in winter
which is what prompted my question.   I guess it's factors like you
mentioned plus of course road conditions that play a larger role.

Winter here as well  -14 C tonight and we have had three power outages in
the last 6 hours.

Bob


-----Original Message-----
From: corvairs-owner at cybrus.net [mailto:corvairs-owner at cybrus.net] On Behalf
Of Merv Krull
Sent: November 30, 2005 9:14 PM
To: corvairs at cybrus.net
Subject: Re: WC: Fuel Milage in winter - only minor Corvair

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 From the Western Canada Corsa list server at corvairs at cybrus.net
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engines run best when it is cool and 100% humidity (raining).. I dont 
remember the math off hand but 1 litre of air at -40 degrees will expand to 
? many times larger at combustion temps of what, around 1200 degrees F?

Does that make a difference for carbed engines? The engine still displaces 
165 cu in of air every two rotations. The same amount of gas gets mixed into

the air flow. The only difference will be the change in temp and resulting 
increase in volume which should translate into more power and less throttle 
needed. Mileage should improve. But, rolling resistance of tires and thick 
grease and oil and reluctant freezing cold bearings might suck up the extra 
power.
theres my two cents
Merv Krull caught in the full embrace of winter here in
Salmon Arm, BC


----- Original Message ----- 
From: "Bob Gilbert" <bgilbert at redshift.bc.ca>
To: <corvairs at cybrus.net>
Sent: Wednesday, November 30, 2005 6:43 PM
Subject: RE: WC: Fuel Milage in winter - only minor Corvair


> -------------------------------------------------------------------
> From the Western Canada Corsa list server at corvairs at cybrus.net
> -------------------------------------------------------------------
>
> :-)
> :-)
> But all joking aside my question was related to the air "chemistry" -
> dry/cold air in the winter vs moister/warmer air in the summer. Just 
> curious
> as to how that might impact mileage - if at all.
>
> Bob
>
>
> -----Original Message-----
> From: corvairs-owner at cybrus.net [mailto:corvairs-owner at cybrus.net] On 
> Behalf
> Of Les
> Sent: November 30, 2005 7:33 PM
> To: corvairs at cybrus.net
> Subject: Re: WC: Fuel Milage in winter - only minor Corvair
>
> -------------------------------------------------------------------
> From the Western Canada Corsa list server at corvairs at cybrus.net
> -------------------------------------------------------------------
>
> If you didn't have winter driving conditions, how would the car know it
> was winter?
>
> Bob Gilbert wrote:
>
>> Hi,
>>
>> I can understand why a carburetored car like a Corvair would have
>> lower mileage in the winter. The choke stays on creating a richer
>> mixture et voila lower mileage - at least while the choke is on.
>>
>> But,
>>
>> a) For a carburetored car after the choke is off and
>>
>> b) for a modern fuel injected car
>>
>> would there be any difference in mileage between winter and summer,
>> ignoring driving conditions for the moment?
>>
>> Curious about winter driving.
>>
>> Bob
>>
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