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7075 alum, what we used to call armor plate still melts around 1500 degrees. I know there's other alloys, but, significantly pricier. Sprint cars don't use their brakes much during the race, going sideways tends to scrub off speed and the brakes are an ancient requirement from years past.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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