Quote:
Originally Posted by mikeyjd
I know I've seen one or more, but I've come up empty so far in my searches. I'm looking for a chart that shows % of aerodynamic drag effect at increasing speed. Thanks.
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Hucho presents a Drag vs Top Speed table in his book.
It's for a particular range for frontal area and inertial class,but he makes a generalized relationship.
The most important criteria for us modders is that the unmodified vehicles top speed actually reflect full net power,just above the rated power rpm.
American cars are 'governed' with their gearing and won't actually achieve their actual power-limited/drag-limited top end.
European cars appear to be geared to actually take advantage of all available horsepower.
Once you're properly geared and have a bona-fide terminal velocity at rated power + 100-200 rpm,then any 30% drag reduction will net a 10% increase in top speed under standard conditions.
This ratio reflects standard passenger car radial tire technology performance
circa 1986.