Tweak bugmobile to make it more driveable

vehicles/bugmobile.tscn

@@ -5,13 +5,14 @@
 [ext_resource path="res://vehicles/vehicle.gd" type="Script" id=3]
 
 [sub_resource type="Curve" id=18]
-_data = [ Vector2( 0, 0 ), 0.0, 0.0, 0, 0, Vector2( 0.103774, 0.493182 ), 0.0, 0.0, 0, 0, Vector2( 0.339623, 0.629545 ), 0.0, 0.0, 0, 0, Vector2( 0.806604, 0.989773 ), 0.0, 0.0, 0, 0, Vector2( 1, 0 ), 0.0, 0.0, 0, 0 ]
+_data = [ Vector2( 0, 0 ), 0.0, 0.0, 0, 0, Vector2( 0.179245, 0.584091 ), -0.306612, -0.306612, 0, 0, Vector2( 0.603774, 0.954545 ), 0.0, 0.0, 0, 0, Vector2( 0.806604, 0.989773 ), 0.0, 0.0, 0, 0, Vector2( 1, 0 ), 0.0, 0.0, 0, 0 ]
 
 [sub_resource type="Curve" id=19]
 _data = [ Vector2( 0, 0 ), 0.0, 0.0, 0, 0, Vector2( 0.127358, 1 ), 0.0, 0.0, 0, 0, Vector2( 0.174528, 0.65 ), 0.0, 0.0, 0, 0, Vector2( 0.212264, 1 ), 0.0, 0.0, 0, 0, Vector2( 0.353774, 0.35 ), 0.0, 0.0, 0, 0, Vector2( 0.363208, 0.968182 ), 0.0, 0.0, 0, 0, Vector2( 0.485849, 0.313636 ), 0.0, 0.0, 0, 0, Vector2( 0.627358, 0.140909 ), 0.0, 0.0, 0, 0, Vector2( 0.721698, 0.259091 ), 0.0, 0.0, 0, 0, Vector2( 0.783019, 0 ), 0.0, 0.0, 0, 0, Vector2( 0.872642, 0.794318 ), 0.0, 0.0, 0, 0, Vector2( 0.915094, 0.248864 ), 0.0, 0.0, 0, 0, Vector2( 0.933962, 0.5125 ), 0.0, 0.0, 0, 0, Vector2( 1, 0.476136 ), 0.0, 0.0, 0, 0 ]
 
-[sub_resource type="BoxShape" id=11]
+[sub_resource type="CapsuleShape" id=20]
-extents = Vector3( 0.156484, 0.596214, 1.89026 )
+radius = 0.274866
+height = 3.59516
 
 [sub_resource type="AudioStreamGenerator" id=12]
 mix_rate = 5500.0
@@ -51,11 +52,12 @@ rings = 3
 [node name="bugmobile" groups=["car"] instance=ExtResource( 2 )]
 mass = 600.0
 script = ExtResource( 3 )
-MAX_ENGINE_FORCE = 400.0
+max_steer_angle = 20.0
-MAX_BRAKE_FORCE = 80.0
+speed_steer_angle = 9.0
-THROTTLE_POWER = 7500.0
+max_engine_force = 280.0
-BASE_ENGINE_PITCH = 0.76
+max_brake_force = 95.0
-EXPECTED_MAX_SPEED = 260.0
+throttle_power = 8000.0
+base_engine_pitch = 0.65
 gear_ratios = [ 3.5, 2.95, 2.64, 2.0, 1.67, 1.42 ]
 final_drive = 4.36
 max_rpm = 9000.0
@@ -64,35 +66,51 @@ sound_curve = SubResource( 19 )
 
 [node name="rear_left" parent="." index="0"]
 use_as_traction = true
-wheel_radius = 0.55
+wheel_radius = 0.52
-wheel_rest_length = 0.6
+wheel_rest_length = 0.4
-wheel_friction_slip = 7.0
+wheel_friction_slip = 8.0
-suspension_travel = 0.8
+suspension_travel = 0.4
+suspension_stiffness = 9.0
+suspension_max_force = 7000.0
+damping_compression = 0.87
+damping_relaxation = 0.9
 
 [node name="front_left" parent="." index="2"]
 use_as_steering = true
 wheel_radius = 0.35
-wheel_rest_length = 0.7
+wheel_rest_length = 0.36
-wheel_friction_slip = 5.0
+wheel_friction_slip = 7.0
-suspension_travel = 0.6
+suspension_travel = 0.36
+suspension_stiffness = 12.0
+suspension_max_force = 7000.0
+damping_compression = 0.9
+damping_relaxation = 0.92
 
 [node name="front_right" parent="." index="4"]
 use_as_steering = true
 wheel_radius = 0.35
-wheel_rest_length = 0.7
+wheel_rest_length = 0.36
-wheel_friction_slip = 5.0
+wheel_friction_slip = 7.0
-suspension_travel = 0.6
+suspension_travel = 0.36
+suspension_stiffness = 12.0
+suspension_max_force = 7000.0
+damping_compression = 0.9
+damping_relaxation = 0.92
 
 [node name="rear_right" parent="." index="5"]
 use_as_traction = true
-wheel_radius = 0.55
+wheel_radius = 0.52
-wheel_rest_length = 0.6
+wheel_rest_length = 0.4
-wheel_friction_slip = 7.0
+wheel_friction_slip = 8.0
-suspension_travel = 0.8
+suspension_travel = 0.4
+suspension_stiffness = 9.0
+suspension_max_force = 7000.0
+damping_compression = 0.87
+damping_relaxation = 0.9
 
 [node name="CollisionShape" type="CollisionShape" parent="." index="6"]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.771473, -0.625139 )
-shape = SubResource( 11 )
+shape = SubResource( 20 )
 
 [node name="engine_sound_player" type="AudioStreamPlayer3D" parent="." index="7"]
 transform = Transform( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.791119, -2.27857 )