I guess I'll feed the troll a little bit... Why swift springs are the "best" springs. They keep their linearity, even with lowering springs. Yes there's a collapsible section to lower the car, then the rest is linear, or as much as it can be.
Click link to test DATA OMG!!!
Now, Chris @ Redshift Motorsports started to test coilovers (yes both height adjustable and spring coil over fixed damper setups for those that like to argue some more) a few years back. He's only done 2. Why has that project stalled? MONEY. He needs to buy a set, install it, dyno it, then sell it. Nobody was buying so project is stalled. Why this last blurb? I frankly think it's rude of you to keep asking for data for free. You want data, pony up the money and test it.
Damper dyno's here cost something like 80 bucks a run, and probably 240 bucks a corner if you want 4 data points. That's only if you buy their revalving service, else move along. In other words, serious time attack cars and above only. So yeah, us pleabs with what is arguably the best "cheap thrills" performance hatch will have to make do with our finely tuned butt dynos. Great thing on this forum is, after you provide data, you can sell the setup and try something else. Oh yeah, track data acquisition costs from a simple solo data recorder for a few hundred to real-time tracking with remote sensors like the guys from Counter Space Garage does for a few thousand a session. Please, share your DATA, the rest of us have to make do since our platform doesn't have the guys @ CSG offering up (expensive) DATA (for free).