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The problem with STD numbers is that cars make significantly more HP in cold air.
STD numbers will be inflated in cold air and underrepresented in hot air.
You could dyno a car in 90 degree weather (STD numbers) and then dyno it again in 50 degree weather (STD numbers) and the number will be way off. The car will make significantly more HP in colder air.
You really need to use SAE numbers if the car was baselined on a different day with different weather conditoins.
My guess is his corrected SAE numbers would have been up around 415 - 420 rwhp because it was so hot. And his baseline numbers would have stayed pretty similar because it was 70 degrees.
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