Oh i understand perfectly. No need.

'Wire material is typically ASTM A228, but the relationship is directly proportional to spring rate. If you used a material with twice the modulous of rigidity, you get double the spring rate.'

This is common sense. Material choice and inherent flex behavior would yield differing results in similar wire sizes.

'... misinformation stating that only wire diameter will change the spring rate of a compression spring.'

To be sure we are on the same page, by spring rate, you are referring to the actual numerical value of the spring... right? To me it sounds like you are defining a compounding effect of compression.

That in turn sounds like you are telling me that ALL linear compression springs are progressive in nature? How is this so when the entire spring, regardless of how many coils are present, bears the same load (not to mention weaken as they are compressed... all flexible materials do, thats why materials like Delrin break, and steel bends)? All coils are 'active' once under load. They remain active as a unit (a singular unit) unless compressed as one (basically becoming a bumpstop).

This in turn goes back to my simplified definition of spring/sway bar efficiency... the ability of the spring to do its work without moving off axis, or the bar without bending beyond its elastic point.