I am still going through my notes from the recent SEMA Show, where I met with several key individuals and reviewed many products. One (of many) company and product lines that stood out to me is "GC Cooling" [gccooling.com] A few years back, two engineers from SPAL decided to go off and build their own line of fans and related components. They have been in Europe for awhile and have finally established a US office. Their products are very well designed and made in Italy. The web site offers some helpful technical information to assist with designing an effective cooling fan set-up. Talking to one of the engineers I was able to confirm some things I've always believed about electric fans: The amount of air they move (eg. CFM) is related to the diameter, thickness, blade design, and speed...as one would expect. The work load needed to drive the fan (by the electric motor) is related the amount of draw. So a fan that moves more air requires more work from the motor and greater electrical load. Therefore looking at the electrical specs for voltage, amps, and watts (remember Ohm's Law?) will indicate something about the makers claims of CFM produced. Simply put, a small fan drawing a few amps cannot possibly move a ton of air. Unfortunately many fan makers like to highly exaggerate their claims about the CRM ratings. GC also offers a nice fan controller. It uses its own temp sensor (installed in the engine) and starts the fan moving at half speed just before the engine reaches full operating temp. As the temp increases from there, the fan speed also increases. For a two fan installation, only one fan is utilized initially. The second fan comes on at full speed with the first one reaches a certain level. There is provision for a "AC" input as well. It is a very nice, solid, small package for a reasonable price. Something like this would replace the radiator mounted temp switch and offer much better temp control. I've used a similar product from a US fan maker but never liked its design or function. The GC unit has several design features that would be a great improvement.