Thanks, D.
It might be a useful marketing ploy to post some actual test data taken on a popular street car (Corvette, rat rod, etc?) owned by one of your employees. Since it would not be paid for by a racing team it would not be proprietary and you could make it public. You could write off the cost of the test as an advertising expense as well. This data would show potential customers just what kind of detailed information that wind tunnel testing would give them.
As far as the yaw tests are concerned, I have copies of test data that was taken on a number of race cars (GT40, Porsche 917, etc) in the 200mph wind tunnel at MIRA in the UK. These yaw tests were done to investigate what the lift/downforce does when the car starts to get out of shape. If the lift increases under yaw, chances are that it is going to spin or at least contribute to instability at high speed.
Regards, Neil Tucson, AZ