Originally Posted by
Oxer
Have you already maxed out the lowering perch on the bottom of the coilover?
Dropping the preload on the spring, which is what you want to do, would be alright as the weight of the car will hold it in position. The only way the spring would unseat is if you were to lift the weight of the car off the ground ie. Jumping.
It will however shorten the length of stroke the shock has. I would suggest no more the 20-30 mm though. It is the same principle as cutting the springs on stock struts.