<VV> Cooling system "goals"

Sethracer at aol.com Sethracer at aol.com
Tue Jul 30 11:22:45 EDT 2013

The only reason I would be interested - and I am interested - in improving  
the Corvair cooling system is to improve the reliability of air flow across 
the  cylinders and heads in a racing situation. I have taken the steps, 
like most  racers, of cleaning out all the paths that air can take through the 
heads and  around the cylinders. I think the stock fan puts out sufficient 
air to cool the  motor in 95% of the driving we all do. So, for 95% of 
Corvair folks, it is not  an issue. For the 5% (or less) who race, we want to 
provide a reliable air  source and, if possible, spend less energy to provide 
that air. The  result of that quest is looking at thinks like vertical fans, 
which should  provide a reliable single plane drive, and more efficient fan 
styles, like axial  flow designs. I am no airflow expert, and I have put many 
street miles on  Corvairs with only a rare belt issue. On the race track, 
however, out of  necessity, I continue to explore many routes to more 
reliable airflow.  I have tried every spring loaded pulley/tensioner ever supplied 
for a Corvair,  some work better than others. I have run every belt type - 
in my experience no  one type is superior - (Your mileage may vary). I am 
running the LeVair  half-speed fan kit. For racing, it provides sufficient 
flow, as long as I  can keep a belt on it. It is not a street option, and is not 
promoted as  such.   
In summary, people should try to chase down the fan options that would  
increase reliability in Heavy Duty applications, racing mostly. Let people  
investigate, try new things, and step on their own toes once in a while. Nobody 
 is telling you to put a new fan on your street Corvair, which may be 
perfectly  equipped for the driving you do. If someone finds a more efficient 
(less HP  used) fan set-up, that also includes a reliable drive, why not try it 
out and  see if us 5%ers can make it work? 
(Once upon a time, there was this electric fan .  .  .   .  .  .  . )
Seth Emerson
In a message dated 7/30/2013 7:52:46 A.M. Pacific Daylight Time,  
BobHelt at aol.com writes:

I meant that increasing the air pressure just isn't  effective  in trying 
force more air past the current openings in  the engine since the  blockage 
to the flow results in a diminishing  return for a pressure  increase.
Bob Helt

In a  message dated 7/30/2013 12:17:00 A.M. US Mountain Standard Time,   
jaysplace at laserpubs.com writes:

On  7/29/2013 8:44 PM,  BobHelt at aol.com wrote:
> Oh come on now!!  That  isn't a fan  problem. That's a  problem with the
> heads and cooling   surfaces. A fan capable of developing greater  cfm 
>  greater  pressure just isn't going to force that much more air thru   
> and/or rest of the engine.
>  Regards,
> Bob  Helt

you mean that a  greater pressure differential  won't flow more air?
Or that more  airflow wouldn't increase heat  transfer?

Jay   Maechtlen

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