Postby ManiacLachy » Wed Jul 20, 2016 11:35 am
I don't consider this a "ride height" issue. I think Magpie was on point, this is a shock travel issue. The tyre is running out of room before the shock runs out of travel. Ideally, the shock will engage the bumpstop before the tyre reaches the top of the wheel well.
If you can adjust the shock length, you can drop the max height of the tyre's travel by making the shock longer. Then you can adjust your pre-load to get your ride height back.
Also, when was the last time you had an alignment?
I had this issue with my HSDs, but I couldn't dial it out completely using the method as I described above. When I switched to my Xidas the issue persisted. Xidas are designed to fit a MX-5/miata specifically, their length was designed to be correct, so shock length wasn't the issue. I got the car aligned and the technician told me that I had extreme caster before he made his changes. This caster alters the line the wheel travels up and down inside the wheel well, and instead of moving into the deepest part of the well, it's moving into a shallower area and impacting the liner.
After the alignment the issue was gone!