strokerzedd Posted March 4, 2017 Share Posted March 4, 2017 My '72 240z has Cosmo coil over conversion with even softer springs and it's insanely stiff, broke the lower adjustment nut in 100 miles! What feedback has anyone got for complete coil over struts? Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted March 4, 2017 Share Posted March 4, 2017 (edited) I assume there is a question in there somewhere... So, what is the spring rate and free length of your springs? How much travel do you have available from your nominal ride height to when you either bottom the strut or stack the coils of your springs. If you run soft springs, then you have to have lots of available travel. Otherwise you will either bottom out the strut or stack the spring. In either case, the lower spring support will take some serious abuse and is likely to fail. I have had the same Ground Control coil-overs on my car for about 15 years. I have thousands of street miles on the car, hundreds of autocross events, and several track days with no issues. The key to a correctly functioning coil-over system is making sure that your suspension doesn't bind or bottom out during use (ever). Edited March 4, 2017 by 74_5.0L_Z 1 Quote Link to comment Share on other sites More sharing options...
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