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Old 11-03-2016, 10:18 PM   #7 (permalink)
Vman455
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Quote:
Originally Posted by oldtamiyaphile View Post
Hucho says Opel saved 0.003CD by cutting a ~930mm section from the centre of the Calibra airdam. Drag increased either side of this.

Hucho doesn't seem to go into detail as to the hows and whys of this.
He does a little:
-"Apparently, by the former measure [the cutout in the airdam] the obliqueness of the flow to the front wheels was attenuated."
-"The central cutout in the spoiler may improve the flow at the end of the underbody, so that a diffuser can work more effectively."
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