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Old 09-29-2018, 12:33 AM   #107 (permalink)
freebeard
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It's a different world here in Ecomodding Central. It's a well-known story in the Aerodynamics subforum.

A friend of aerohead's built it in the last century. He drove it to Mexico and back once a year. You can dig out the details there. I'd be skeptical of a 20% improvement since the bottom is left undone. The point though, was about the box cavity. Here's a less extreme example:



If you care, the more extreme example would be Morelli's Urban Car.
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