i dont know hows yo settings in simucube and i dont own simucube , but i own dd wheel too, but then i dont own pCARS3 xD but i own pCARS2 an i tell yo best settings are to put yo force in wheel driver at max, then in game gain as yo desire nm to be. in my case i have 20 nm wheel i set it max, then i want 10 nm in game so i choose 50 gain, then i set tone at 100 as its side forces i want feel slips countersteer, weight transfer etc, fx at 0 as wheel already have those wit tone at 100, then i settin volume per car like 50-60 ,on most road cars an 70-80 and sometimes 100 at race cars and open wheelers