Bill Freeman wrote:

Rodger Hilyard wrote:

FYI....................

http://www.usradiator.com/options.htm

U.S. Radiator Corporation

       SNIP  

 Over the years several manufacturers have built

 versions of the triple pass radiator for racing, the most popular
being
 midget and sprint cars, in an effort to obtain maximum temperature
 drop (inlet to outlet) in a very small or limited space.  Using their
state

                  SNIP  

 By
 building internal walls in the radiator, the coolant is re-routed to
pass
 through the radiator (top to bottom or side to side) three times
resulting
 in three separate exposures to temperature dropping air-flow, with
little
 or no adverse flow restriction. The result is an average 15%
reduction
  in radiator outlet temperatures.  U.S. Radiator now offers this
unique
  flow design on all non-trans. cooler type radiators in their
extensive line
 of high performance vehicle applications.

Bill Freeman wrote:

  Paul,

It appears that this is the counterflow design, in production.  If
I read this correctly, the hot water goes in the rear, then thru the middle
then thru the front, working like a correct counterflow heat exchanger
design.  This is a medium big deal.

This should be a great improvement, since the avg  delta T is much
more favorable and the whole core is working more effectivley.

Bill

I too thought the same thing and I looked into it. These guys
are not that sofisticated. It is merely down up down. One
end is cooler and one end is hotter. Too bad! They were dumb
founded when I mentioned it.

When they need more heat transfer they add another row of
tubes making the rad thicker hence less efficient and more 
drag. My super compact heat exchanger would revolutionize
200 MPH stock car racing and NASCAR would outlaw it :-)

Paul Lamar
 
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