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Old 01-07-2013, 05:43 PM   #478 (permalink)
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Sorry, no citation for you. However, similar cars like the Porsche 956 (which seems to have been the first of their "tunnel cars") had a cD of over 0.5, which is hardly good from our perspective. The cDA was lower than would have been seen by a conventional winged car making the same downforce, but it still wasn't exactly great.

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