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I'm actually more concerned about stability at highway speeds. Next month, I'm going to be taking a 600 mile trip on I5 into Oregon, and I want to know I'm not going to lose control because of traction loss from aerodynamic lift. Downforce and lift may be just a distraction in the city or around town, but on a freeway where average speeds are around 80 MPH, it plays a vital role.
You could have a car with a super-low Cd, but if it lifts at speed, you're not going to have any control if you need to suddently stop or swerve into another lane to avoid an accident.
Browsing the threads, I've seen a bunch of great data on Cd, but almost nothing on how they affect lift or downforce.
For example, tire spats force air away from turbulent rotating tires. Without them, air would be pushed under the treads, creating a super-high pressure zone at the base of the tires. With the spats in place, that high-pressure zone is reduced, thus reducing lift.
Vortex generators can reduce drag (6 points on the Evo VIII), and increase downforce when a non-cosmetic spoiler is present. If it generates lift or downforce without one, I haven't a clue.
This thread is for ideas that both cut drag and cut lift. Know any good tricks?
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