I've been reading into copper vs aluminum a little deeper. And, Depending on the product, you are right, you can find Alumuminum cored setups that cool better than the available copper cores. It would take a brasstube/copper fin to have the same exact design to perform better. Manufacturing techniques on copper/brass are improving for the super high efficiency cores, but I'd suspect it to be a few years before its as cost effective for them vs the aluminum. My statement of fact was wrong in the automotive arena, its design/ builder that makes the difference on automotive radiators. I had stated a metal property fact, and not an automotive fact. --Tom -- -- Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en.