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Old 11-13-2014, 11:39 AM   #26 (permalink)
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Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
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Originally Posted by woodstock74 View Post
Lots has been said about making a flat wheel cover, however I feel it's more important to limit the flow transfer from the wheel to the airflow moving down the side of the car. The above achieved a 2.5% increase in MPG on my Nissan Versa (the largest single gain I ever saw with one change) and they certainly aren't flat perse.
Have you posted about this before? If not, would you consider posting a dedicated thread? It's really nicely executed and I like that you tested it.
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