EDIT: I am now also using jack spades settings, scroll down below to see the settings.
This has worked for me, so hope it will for you guys aswell. Cause i couldnt seem to find too much out there on the webs
In the car ingame i use some of the tips from Dgangi on isimracing
PCars version: PS4
Wheel: T300RS
Degrees: 900
Control Settings
Steering Deadzone - 0
Steering Sensitivity – 70
Throttle Deadzone – 0
Throttle Sensitivity – 50
Brake Deadzone – 0
Brake Sensitivity – 35
Clutch Deadzone – 6
Clutch Sensitivity – 35
Speed Sensitivity – 0
Controller Filtering Sensitivity – 0
Damper Saturation – 0
Force Feedback – 65
RMP Gear Display – Yes
Controller Input Mode - 3
Advanced – On
Soft Steering Dampening – Off
Visual Wheel Filtering – On
Opposite Lock Help - Off
Force Feedback Settings
Tire Force – 100
Per Wheel Movement – 0.00
Per Wheel Movement Squared – 0.00
Wheel Position Smoothing – 0.04
Deadzone removal range – 0.00
Deadzone removal falloff – 0.01
Linkage Scale – 0.00
Linkage Stiffness – 1.00
Linkage Dampening – 1.00
Relative Adjust Gain – 0.98
Relative Adjust Bleed – 0.10
Relative Adjust Clamp – 0.96
Scoop Knee 1.00
Scoop Reduction 0.15
Soft Clipping (Half Output) – 0.00
Soft Clipping (Full Output) – 0.00
The steering sensitivity setting may vary depending on your wheel and degrees of rotation, but on my T300RS I found the default setting of 50 to be very vague. 70 seems to provide a good turn-in feel.
Force feedback strength may vary, but 65 was good for the T300RS.
Make sure soft Steering Dampening is Off.
Scoop knee seemed to create a point during the steering lock where the FFB artificially increases. Setting to 0.0 or 1.0 gets rid of this behaviour. Setting it to 1.0 allows you to also adjust the overall FFB strength reduction with Scoop Reduction. Perhaps set this to 0.0 if you’re trying to increase FFB strength to weaker wheels.
If you got something better, please show and ill try