![Love Is in the [Charge] Air - Secondary Radiator R&D, Part 2: Prototype Testing and Data](https://www.mishimoto.com/media/magefan_blog/2016/07/015-2-1.jpg)
Last time, we took a look at the unique design of the Ford 6.7 secondary Super Duty radiator and its accompanying thermostats. Our last post was only about two weeks ago, but I come bearing some good news - plus, great things come in twos.
Why does my primary rad need a companion?
As a recap, this heat exchanger, found in 2011+ Ford Super Duty trucks, works as an integral part of a mostly independent secondary cooling system that manages many of the truck's auxiliary cooling needs, including those of the liquid-to-liquid charge air cooler. Cooling these engine components more efficiently should not only prolong their useful lives, but also may make for some nice performance benefits if coupled with a tune - who doesn't love colder charge air?
The secondary system allows the primary radiator to more exclusively and efficiently cool the torquey Power Stroke motors found
