[DeTomaso] Difference between an aluminum radiator and one that is black

[JDeRyke at aol.com]

In a message dated 6/23/09 5:13:02 PM, ehpantera at yahoo.com writes:

> Has anyone studied whether there is a difference between an aluminum 
> radiator and one that has been blackened. I would think the black one would 
> reject more heat.
>  
> 
All nickel-and-dime stuff. The biggest single thing with an aluminum 
radiator is, the water tubes in the core can be as large as 1-1/2" wide by 1/8" 
thick, with 0.060" walls. Copper/brass radiators of any type are constrained 
to an absolute max of 5/8" wide tubes x 1/8" thick with 0.015" walls, all of  
 which restricts water and air flow and internal pressures: the paper thin 
copper tubes are extremely fragile and simply cannot handle internal 
pressures much above 12 psi. 
With the DeTomaso Pantera having a 20% SMALLER radiator than a comparable 
engine in a Corvette due to our body lines, we have always been marginal in 
cooling capacity unless modifications were done. As I've said many times, 
I've tried every mod known to man on our Pantera over a 15 year period, and 
nothing changed the cruising water temp more than a degree or two, until I 
added an aluminum radiator. Immediately, water temps dropped 20 degrees. End of 
story- J Deryke


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