Years ago, I used to use a cool can when I did a lot of drag racing. It's purpose as I understood it, was to cool the gasoline just before it entered the carburetor. This being done, the fuel is now more dense. We also insulated the fuel line going from the cool can to the carb[s], and put a heat shield between the carb[s]and the intake manifold. The idea was, more dense fuel charge along with the cooler air from the hood scoop, meant more dense mixture to the cylinders, which means greater volumetric efficiency, which equals more horsepower! Be sure to drain the cool can after every run, so as to not spill any water on the track, and getting on your tires. If you want to get real efficient results, use "dry ice" in it with 1" of water in the can- that really cools the fuel down!! I hope this helps your decision! It works!
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