Pictured is a breakaway of a cooling fin from a Fluidyne radiator core. As you can see, co
"It improves heat transfer and reduces cylinder head and overall coolant temperature," says Dave Granquist of Red Line Oil. "Water Wetter does this by reducing the surface tension of the water, and it promotes nucleate boiling. This means that it promotes a more efficient heat transfer off of the hot spots in the engine. The upper cylinder walls and the cylinder heads are bad to trap water in crevices, and the lower surface tension helps reduce that.
"We have seen reductions in temperatures of 20 to 30 degrees," he continues. "This is mostly in situations where we can optimize the cooling system. Typically this is where we can get rid of the antifreeze and just use water and Water Wetter, which is the best combination for heat absorption."
Let The Buyer Beware
When researching this article, Chet Blanton of C&R Racing offered us a tip that we hadn't thought of before: At least when it comes to radiators, the high-end expensive stuff may not be the best for your needs.
"The worst thing we run into here," says Blanton, "is if some guy goes and buys a radiator off of eBay or some discount warehouse place that sells used parts. Then he calls us and says, 'Hey, I've got this radiator that's one of yours, and it's not cooling.' I'll ask a couple of questions and find out he's running at a half-mile track and the radiator he bought is 4 or 5 inches thick.
"He'll brag that it's a radiator that was run in one of Jack Roush's cars or some team like that, and it should be the best thing available. Well, it is for a Nextel Cup guy running a high-speed track, but for this guy running a half-mile track in a car that's considerably slower than a Nextel Cup car, that's not a good radiator for his needs. The low-budget guy may think he's saving some money by buying used parts, but if you try to buy a Daytona radiator for running at your half-mile track, that's going to be totally wrong."