My settings:
Wheel:
SEN according to car dor -> set 40° in-game
FFB 90
SHO 100
ABS OFF
DRI -01
FOR 100
SPR OFF
DPR OFF
FEI 00
in-game:
FFB Gain 60%
Everything else 0%
Brake gamma 1.00
The only thing that will clip a bit are high downforce cars in very fast corners, but you can reduce the gain per car for that. And yes you want to avoid any clipping the pedal app may show you, as it makes the FFB useless. You may want to use either a few percent of filter in-game of 2-3 steps of FEI on the wheel for car/track combos that make your wheel rattle a lot. Mod tracks can sometimes to this.
//Edit: I use the CSL Elite PS4 wheel.