[DeTomaso] Stock fan output vs. Flex-a-lite

[JDeRyke at aol.com]

In a message dated 12/02/06 11:28:56 PM, scottcouchman at yahoo.com writes:
snip....
<<...There was a lot of conflicting information/opinions, but one of the 
comments that made sense to me (at SEMA) was that pusher fans are pushing cool 
air, while sucker fans are sucking warm air. Cool air is easier/more efficient to 
push than warm air is to pull.... >>

The actual construction of the radiator influences cooling, too. In a 
mid-'80s NASCAR-oriented magazine, Earnie Elliot talked about brother Bill's cooling 
problems with a then-new body design. It turned out that the fin & tube 
spacing in the custom radiator they were using was too dense. It took wind tunnel 
testing to show air was stacking up outside the grille opening & not even going 
thru the radiator. The fix was another radiator with FEWER fins & tubes/inch 
that actually let air thru it at Talledega speeds. Their engine temperature 
dropped 40 degrees at speed- in a car that uses expensive in-and out-ducting but 
NO shroud nor fans at all!
Reminds me of the first Hall 'Phoenix' radiator I ever saw. When I held a new 
one up to a light, not a trace of light could be seen thru the finning, so 
how could enough air flow through? Its worth noting- Hall no longer sells this 
enormously heavy 7-row unit & told some of us, 'there are better choices out 
there.....' 
This all may apply if you start driving long distances at over 140... 
otherwise, any of the aftermarket units will likely be just fine, with or without a 
shroud, incoming or outgoing.  FWIW- J DeRyke