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Old 09-14-2019, 12:29 PM   #4 (permalink)
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somewhere we've got a dedicated thread on diffusers and belly-pans.
Seems like Carr's research reported that adding a complete bellypan with diffuser would cut drag 7%.If that's correct,then,historically,it would be hard to see more than around 3.5% delta-mpg for the entire underside of the car.We'd need to verify that.My memory is not to be trusted.
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