TO GET A RALLY CAR DO THIS:

weight: 8
max speed: 50
min speed: -8
acceleration: 25
braking: 150
grip: 0
CG_X: 0
CG_Y: 245
moment: 1000
mass: 20
thrust: 15.0002
tyre X: 0.1339
tyre Y: 0.99
handling: 10
turning: 100
turn ratio: 12