<VV> Cooling Question

[jvhroberts at aol.com]

Here's why:
1. The engine was designed for top down cooling.
2. The top side of the engine gets FAR cleaner air than the bottom!
3. Convective forces are so small compared to what the fan does, it 
doesn't matter.

All of the things you mention may be worthwhile on a water pumper, but 
Corvair engines (as well as automotive air cooled engines in general) 
have rather high pressure differentials across the fins, etc. About 10X 
that of a radiator. Meaning, unless you find a way to generate SERIOUS 
air pressure, you're, quite literally, spitting into the wind! Also, as 
has been proven many times here, electric fans are simply incapable of 
developing these kinds of pressures, at least from any practical 
standpoint!

John Roberts

-----Original Message-----
From: moonpie8n at comcast.net
To: Bill H. <gojoe283 at yahoo.com>
Cc: virtualvairs at corvair.org
Sent: Wed, Jan 5, 2011 2:29 pm
Subject: Re: <VV> Cooling Question


I have been running this back and forth in my mind for a long time , 
.... DID
ANYBODY EVER CONSIDER REVERSE COOLING ON A CORVAIR ???? I am sure GM 
had sound
engineering reasons for setting it up the way they did , BUT , their 
goals are a
lot different than mine. I know if I could get the compression up 
around 10 &
3/4 or 11 to one I could get some good torque numbers out of the 
engine.
Compression goes up , ... HEAT GOES UP , and there is the "RUB". IF the 
exhaust
manifolds were pointed toward the back of the car, the ,"BARN DOORS" 
removed,
and the heater outlets blocked, an amount of air from under the car 
would be
forced upward thru the cooling fins [along with heated air from the 
manifolds].
Then , an electric fan placed at the top of the cooling bellows, w/ the 
belt
driven fan removed. 3" outlets at each corner of the bellows with hoses 
run to
evacuation fans that push heated air out louvers cut in the side of the 
car. A
larger remote oil cooler would be used. Then a spoi
  ler on the rear deck lid with a 2" slot ,"DOWNWIND" of it to evacuate 
more
heated air from the engine compartment [WOW, this sounds complicated]. 
Would it
move enough air to overcome the heated manifold air, and increase 
cooling......
Sorry Bill , ... didn't mean to step on your question , but , you got 
me
thinking.
BOB [I have a headache now]
Moonpie Racing
----- Original Message -----
From: "Bill H." <gojoe283 at yahoo.com>
To: virtualvairs at corvair.org
Sent: Wednesday, January 5, 2011 1:04:32 PM
Subject: <VV> Cooling Question

B"H

Hi everyone. I have a question that has been bothering me for some 
time. I've
noticed in some photos of Corvairs with A/C, that the owners installed 
a couple
of auxillary fans in front of the 1966-67 style condenser.

It would seem to me that this is a great way to ensure that the A/C 
system works
at its peak efficiency, and even more importantly, helps prevent the 
engine from
overheating in hot summer weather when you're stuck in traffic.

I've de-flashed my heads and done everything I can to seal my engine
compartment, but I'm always looking for ways to keep the oil temp below 
260
degrees in summer.

Anyone have experience with this? Any suggestions?

Thanks!...Bill Hershkowitz 69 Monza Coupe 110 PG A/C




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