What is the suction useful for? The engineering blows my mind but why would someone use this? Does it help on turns?
https://en.wikipedia.org/wiki/Downforce
Yes, and at high speed, it helps make sure you don't take flight accidentally.
When you don't have enough:
https://www.youtube.com/watch?v=e21ZjwZGjiQ
It's for more traction. Not a road car, but this one does 0-100kph in just under 1s. https://www.youtube.com/watch?v=XQIu5tZ0vbQ
https://en.wikipedia.org/wiki/Downforce
Yes, and at high speed, it helps make sure you don't take flight accidentally.
When you don't have enough:
https://www.youtube.com/watch?v=e21ZjwZGjiQ