I just read a aero test on the Dallara F312. The testers had some time left in their wind tunnel session, so they remove some of the new aero features on the car, one at a time, to see what their benefit were. They found that the vertical flow deflector on the outside of the side-pod near the cool duct entrance improved down-force with a small drag penalty. What was strange to me was that the down-force balance was shifted to the front! Why would that be the case?
The deflector look just like the white ones on this Williams.
Brian