Originally Posted by Porschefile
Gurney flaps are for the rear wing, and don't work on APR style wings anyway. They basically just clean up the airflow and increase the wing's downforce, but I don't think it'd work up front. Definitely tape up those holes though.
That amount of downforce will be noticeable but not crazy, but at 120mph it should produce 400+ pounds and that will really plant the car. Even an enormous front splitter probably won't make as much as your wing will make, my goal was always just to get close(r). Good luck in the one lap, I've always wanted to run that.
Here's the specific data on the wing
at 120mph theres 345lb of force and 39lb of drag