Thats it. I can improve a car with my standard 10, 25, 15 setting and can fine tune a car in 15 min, two laps at a time. Getting the LSD right will make the other suspension adjustments all work as the game says they should work. Below are my suspension setting starting points by vehicle type. There is really no need for me to explain fine tuning of the suspension because 20 or so other tuners have done a great job explaining how these should work. I hope this was helpful.
FF Cars
Initial Torque 8
Acceleration 15
Braking 12
Ride Height: front -10, rear -10
Springs: front 8, rear 12
Damper extend: front 4, rear 6 (relative to the spring rate)
Damper compress: front 2, rear 5 (relative to the spring rate)
Anti-roll Bars: front 3, rear 5
Camber: front 2.5, rear 2.0
Toe: front -0.25, rear -0.25
FR Cars
Initial Torque 10
Acceleration 25
Braking 15
Ride Height: front -10, rear -10
Springs: front 12.5, rear 10
Damper extend: front 7, rear 5 (relative to the spring rate)
Damper compress: front 5, rear 4 (relative to the spring rate)
Anti-roll Bars: front 5, rear 3
Camber: front 2.5, rear 2.0
Toe: front -0.25, rear +0.20
MR Cars
Initial Torque 10
Acceleration 25
Braking 15
Ride Height: front -10, rear -10
Springs: front 12.5, rear 12
Damper extend: front 7, rear 6 (relative to the spring rate)
Damper compress: front 5, rear 5 (relative to the spring rate)
Anti-roll Bars: front 5, rear 4
Camber: front 2.5, rear 2.0
Toe: front -0.25, rear +0.20
4wd Cars
Electronic sensing center diff 30 front and 70 rear
Initial Torque 10 both front and rear
Acceleration 25 both front and rear
Braking 15 both front and rear
Ride Height: front -10, rear -10
Springs: front 12.5, rear 12.5
Damper extend: front 7, rear 6 (relative to the spring rate)
Damper compress: front 5, rear 5 (relative to the spring rate)
Anti-roll Bars: front 5, rear 4
Camber: front 2.5, rear 2.0
Toe: front -0.25, rear +0.20