Here's the drag breakdown for an f1 car. A=1.25
cd cl hp at 320 kph
Base shape 0.3 0 216
ground effect 0.2 2 144
wings 0.4 0.8 287
total 0.9 2.8 646
So the wings provide around half the downforce for twice the power consumption of the body in ground effect
Thanks Greg, those numbers sound realistic and make very clear how much upside there is for active aero in an F1 type car. Anyone ever done variable geometry GE tunnels? Looks quite obvious if it were permitted.