#BenyUK :
what would you want to see in the video? improving physics is just a constant scripting -> starting the game -> testing -> leaving the game -> scripting... and that goes on and on. everyone who improves physics does it different way so there is no tutorial but i will tell you to start off with a config.java in system/Scripts/util/
the lines you are interested in are:
static float wheel_gndfeedback_factor
static float wheel_brake_factor
static float gravity
static float ground_friction
static float steerSpeed
static float steerhelp_turn <- decrease only
static float steeringPower ** <- BE CAREFUL WITH THAT ONE( **power steering**)
*** everytime you change something in the Config.java you need to start off fresh with the options file deleted // location: save/game/***
if you see some improvement move on to the Tyre.java in parts/scripts/rgearpart/reciprocatingrgearpart/ ...
