I'll be amazed, amazzzzed, if that car, stock, can create enough down force to keep itself on the road with stock tires, I don't care how good your TC is. Look at the size of the wing on the new Zr1 https://youtu.be/O_adY_b-aLQ?t=3m14s
As a matter of fact, F1 cars in the 70s-80s were using venturi tunnels that extended the entire length of the vehicle. This is impractical in a modern gasoline-powered car.
Theu were even getting so good with their aerodynamics that they were rumoured to be generating more downforce with ground effects than from wings.
In an electric car, you could do what they were doing back then.
Aero at street legal speeds is basically worthless and range-destroying. Many supercars don't have more aero than the Roadster, just go look at them, they usually either have no wing, like the Lambo Huracan, or a wing with virtually no angle of attack.
[1] http://st.hotrod.com/uploads/sites/21/2017/09/149-test-tune-...