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The fact that it is stock does make it optimal for any and all situations. Could it be? Sure. Does it automatically make it optimal? No. The stock system was designed to meet a huge array of operating conditions and climates. To truly determine optimal for a given engine in a certain pursuit you would need to be able to tightly control the coolant input temp, like you could on an engine dyno, and measure the results of scaling it up and down. Even then, that would only determine optimal power production temperature unless you're going to go through several motors and tear them down after subjecting each one to a range of temperatures to determine what is optimal for longevity, as they may not be one in the same. That being said, it's kind of a moot point since I've yet to see the conclusive study that proves a 10-15 degree variation has a profound effect on power or life span. A mass produced engine is designed to operate with in a given range and as long as the temperature doesn't go beyond either end I doubt you'll see a significant impact. I have no doubt it does exactly what it is meant to do and that some people would benefit or may even *need* it. But as stated in one of my other posts my argument is with it becoming a default must have when there doesn't seem to be a need for it to be so critical.

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