!John
Unfortunately standard suspension isnt adjustable in the way you want, so unless you have coilovers or another type of uprated suspension I dont think it would be possible to adjust whats in the car!
Also it depends on the individule kind of coilover in the car if they are there!!!!
Not all coilovers are damping adjustable!
Maybe stick up pics of whats in the car and someone will know if it can be adjusted!