Interesting idea! There may be some pretty high forces involved, depending on how high you want/need to raise the car. I did a little searching to get a ball park estimate and found this on Ted Mitchell's site:
SUSPENSION GEOMETRY
NEWLY REVISED
http://web1.wavelinx.net/tmitch/tech.htm
Lots of data there! It shows that the total sprung mass of the front is 1105lbs, so if you wanted to lift the front to the max height you'd need a force of that (times a multiplying factor) from your linear motor. The multiplying factor is the effective length of the sway bar arms/length of your attachment arm. The sway bar arm effective length is about 7.5". If your attached arm is in the position shown, it can only be 3" or so long or it will stick out below the bottom rails and start hitting stuff. If your linear motor were mounted vertically just in front of the front trunk, the arm might be 5' to 6". In either case you looking at significant forces or not as much lift. Since the springs are pretty linear 1/2 the force would give you 1/2 the lift.
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