<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 . . . . . . . )
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.
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.
> Bob Helt
you mean that a greater pressure differential won't flow more air?
Or that more airflow wouldn't increase heat transfer?
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