<VV> Cool air

Tony Underwood tony.underwood at cox.net
Mon Jul 19 23:00:16 EDT 2010

At 09:50 PM 7/18/2010, Dennis Pleau wrote:
>Big difference cooling the air charge vs. cooling the air + fuel charge.
>Cooling the air charge increases the air density and may increase
>horsepower.  Cooling the air + fuel charge in most cases condenses the fuel
>and drops it out of the air stream making for really uneven burn
>The big deal for hopping up late model rice burners seems to be honking big
>chrome air intake manifold. Also recent VV post spoke of the benefits of the
>length of air intake manifolds discovered by Chrysler Corp in the 50's and
>60's.  Has anyone experimented with this on the corvair engine?
>  Harry Stewart

The closest GM ever came was on the Astro cammer engine which had 
heads with individual intake runners mated to Rochester 3xbbl carbs, 
eliminating the intake log which is where the intake flow problems 
come from in 'Vair cylinder heads.

Of course people have been whittling and welding Corvair heads for 
decades and putting 3xbbl Webers and Zeniths on 'Vair engines to get 
around that intake log issue.   Others bypass the head-mounted carbs 
and extend the intake runners up and into a central plenum sporting a 
single carb that saves a lot of headaches with throttle linkage and 
the somewhat depressing expense of the 3xbbl carbs.


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