When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The spring height adjustment is set so the spring sits right against the top mount... meaning I adjusted that ring so when the coilover was sitting in my lap the spring would not move around...under no load.
Most/All of the height adjustment was done at the lower adjustment point (strut body height adjustment). Figured this way the strut piston would be allowed the full travel if needed.
The ride height adjustment should always be done by the lower shock body adjustment only. The upper spring perch adjustment is used to set the spring preload. Too much preload would be stiff, too little would be too soft and can bottom out. Usually that is already set by the manufacturer. Either way, you want to make sure that the preload is the same all around, or at you may have different effective spring rates .