I'm making a drag racing game. But I'm only 11th grade, and I'm not the best with physics. I won't ask you to make the game, but what formulas to use. I have the following variables(?). From these I have to make a car move realistically :D //Car specs car="2010 Ford Shelby GT500"; //Engine specs engine_model=V8; engine_capacity=5.4; horsepower=540; compressor=intercooled_supercharger; //Transmission transmission_type=manual; gears=6; axle_ratio=3.55; gear_ratio1=2.97; gear_ratio2=1.78; gear_ratio3=1.30; gear_ratio4=1.00; gear_ratio5=0.80; gear_ratio6=0.63; current_gear_ratio=1; gear=1; final_gear=0; //Drivetrain drive_type=rear_wheel; front_tires="255/40ZR19.0 BSW"; rear_tires="285/35ZR19.0 BSW"; tire_diameter=27; tire_radius=tire_diameter/100/2; //Other exhaust=base_dual_exhaust; suspension=sport; weigth=1777; Some of these probably won't be used for physics, but for else. I have tried this final_gear=current_gear_ratio*axle_ratio; rpm=(axle_ratio*speed*current_gear_ratio*336.13)/tire_diameter; speed=(rpm/60*(1/final_gear)*2*3.14*tire_radius)*3.6*0.9 But it just doesn't work. Sorry for my stupidity.