Gotta have a big ass wing.
With all the up roar on sccafourms about wings in ST, front air dams offer much more potential down force than wings. I think about the max down force from a ST wing at solo speeds is about 200lbs. If you can make .25 psi (number pulled out of the air) negative pressure under the car with an air dam on a car that is 5ft wide X 7 ft long you get 1260 lbs of down force.
Do I think wings work at solo speeds? Yes I do. The nice thing about wings is cars tend to push at low speeds and get lose at higher speeds. A wing lets you set up the car loser at low speeds without getting to lose at higher speeds. And yes big wings look stupid on miata's.