2 suggestions.

1) there should be a recomended starting point in the instructions that came with the shocks. Also try checking that companies website. They might have a database for most vehicles.

2) Spring Preload - ADJUST THIS FIRST. I'm not sure about cars, but on motorcycles 1/3-1/2 of the total travel shock travel should be sag.

3) Dampeneing - If in doubt, start with the dampening dialed set all the way out. Add dempeneing by adjusting it a few clicks or 1/4 turns in on the adjusters until the ride is controlled. Start with rebound dameneing first. As a rule, you want as little dempening as possible to maintain control of the car in all settings.



That's what I know from motorcycles which are probably easier to set-up and adjust in general sicne a rider of a motorcycle is far more in tune with what the vehicle is doing than a driver of a car.