I can't find your third thread, but for everyone else, selected numbers are.
Total intake block cD change = -0.020
Baseline with 19" wheels = 0.249
19" aero wheels = 0.223
21" style wheels = 0.257
Depending on options specified, such as wheels, it is impossible to say 8% is the same for every option. But this test was done on the baseline model with 19" wheels and that, with all intakes blocked, reduced drag by 8%.
Would the same 0.02 change be found with the other wheels? Who knows? would the same 0.02 change be found on the myriad of numbers listed by aerohead, again we don't know.
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Good example of Aerohead deliberately trying to create confusion.
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Unfortunately true, I think it is a superiority issue, and good points/arguments get drowned out by the never ending gish gallop of aerohead.
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Since Julian Edgar has not provided any specificity as to what ' 8% ' actually means, ' 8%' remains an unknown quantity to any of the 136,000 EcoModder.com members who might wish to 'engineer' cooling systems.
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Reading the referenced paper generally helps here.