These work well for me. I get a dead spot mid corner though.Completely subjective of course but since the FFB lost some key details on Dec 10 these are the settings I've used to get a bit of feeling back in my R12:
Pithouse:
FFB: 100%
Wheel Speed: 100%
Interpolation: 2
Damping: 25%
Friction: 0
Inertia: 0
Spring Strength: 50%
Speed Damping: 0
Equalizer: All 100%
In Game:
FFB: 65% all cars - Hypercar - 75%
Smoothing: 1