<VV>Fan HP

[Ron]

The reverse flow concept would kill one of the best features of the Corvair 
design and that is the downward flow that keeps all of the top engine 
equipment at near ambient temperature, the carburetors, alternator, 
distributer, etc. all run cool and trouble free.  Also, of course, a ducted 
cool air supply would need to be found for the engine air and the dirty air 
from under the car certainly wouldn't be optimum for that.  Also, I wouldn't 
be willing to toss the entire heating system and revert to a car from the 
twenties.  It seems obvious that the problems found will easily exceed the 
problems solved.
RonH

----- Original Message ----- 
From: "Padgett" <pp2 at 6007.us>
To: <virtualvairs at corvair.org>
Sent: Saturday, June 25, 2005 9:33 PM
Subject: <VV>Fan HP


>
>>It's all in "Corvair Basics"!
>
> Now that is the kind of answer I would expect from a Microsoft rep. 
> Entirely accurate but since I do not have a copy (yet, ordered several 
> books last week, plan to order more on Monday), useless.
>
> Am in the process of building a library (and the prices seem quite 
> reasonable) but was hoping that someone would furnish me with three data 
> points: HP required at 2,000/3,000/4,000 engine rpm
>
> BTW can see that just removing the lower shroud would not help much unless 
> something is done about the underbody pressure at speed, why I keep 
> mentioning an air dam.
>
> Understand that the elecric fan concept has probably been beaten to death 
> but has anyone done a flow analysis of the engine compartment without the 
> fan ? Tried routing underbody air from the rear wheel area into the engine 
> compartment ?
>
> Most modern cars are "bottom breathers" and use an air dam below the 
> radiator support to both route air to the radiator area and create a low 
> pressure area under the engine for extraction. Fans today are computer 
> controlled and shut off above 50ish  mph.
>
> Think a cheap experiment would be to remove the centrifugal fan entirely 
> and mount a 90's 3800 radiator fan ($20 from a pick-a-part) to pull 
> cooling air from under the car and exhaust through a deck lid propped up 
> an inch or two. Has anyone ever tried that ?
>
> A lot of things that are not only common but cheap today were impossible 
> in the 1960's.
>
> Padgett
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