Sounds like an aluminum radiator add to me.
Here's another point of view:
Testing is the key to improvement in any industry. In order to obtain accurate test data and information you must have the right test equipment. For example, if you were measuring increased horse power the dyno would be the appropriate tool for the job.
Testing thermal- dynamics and heat transfer requires a more complicated measuring device capable of duplicating almost any kind of driving condition as it relates to the flow and heat transfer of automotive coolant. ThermoDynamic Inc. was chosen for the task of developing such a device, having developed test instruments for many of the major automotive manufacturers.
It was learned, for example, that core design has more bearing on temperature drop than material (copper- brass verses aluminum). Also learned that 2 rows of 1-1/4" aluminum tubes had only a 3-degree advantage over 4-rows of 1/2" brass tubes at 65 m.p.h and a 2-degree disadvantage at idle. Given the added core thickness of the aluminum radiator we had expected a greater temperature drop...but, it wasn't there.
Our test of similar core designs proves conclusively that aluminum radiators offer no real temperature drop advantage over copper and brass. On the other hand, aluminum radiators weigh about 2/3rds as much as copper and brass units and if your racing, that 9 to 12 pound difference could be real important.
http://www.usradiator.com/testing.htm