By studing Car Physics, its very hard/complex process . High level knowledge of c++ ,Math, inventing, tweaking is required
Sorry , i cannot help You that easy way, simply impossible without mathematical knowledge of physics to get stable drift, you will be just trying , sometimes happens that trying gets sucesfulll, Hats Off , Finally i will redirect You to wikipedia – > Vehicle dynamics - Wikipedia … there are thousands of ways to do this if you put maths together You will need to understand how car behavior is chaning due to gravity , speed, temperature, slilpangle, slipratio, downforce, acceleration/decelleration, weight, mass, Inertia(hardest part), torque applied, , CentripetalForce, CentrifugalForce , Camber , Caster, Toe Suspension|Wheel Angles & dilematic procedure of picking that right inputs to get this even playable (I have picked Gamepad as primary Controller as it is most used controller for Console Games) & many more factors, … most of theese factors are comming from Three basic Newtons Rules. So I hope you understand that this game is not made that simple way & its made 99% in pure c++.with tons of function,calculations, measuremens, plots, graphs… Very important part of developing was also watching real world inspiring drifters videos on Youtube including Gymkhana motosports , Ken Block the one of the Best Rally Drivers in The World , Drift Japan, Togue Extreme Forrest Road Driftters Japan & others,
Note: This game is not using|containing any of VehicleMovementComponent , PhysX Vehicles API or any avaliable vehicle plugin from Marketplace or any stuff avaliable from Youtube tutorials with ALL RESPECT TO THEIR CREATORS.