Quote:
Originally Posted by Grant-53
Our 1970 Ford Falcon 6 cly. suffered from being blown about when passed by tractor trailers at 65 mph. The wake pushed the car about 3 ft to the right. I attached an 8 inch rubber air dam to the front pan. After that the wake gave only a slight push fore and aft.
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Yes, in old cars, a front air dam can be very effective at reducing lift.
In more modern cars with much flatter undersides, it's better to further improve the underside smoothness to reduce lift.