So not to jack your thread... but I did some interesting math tonight based on Tesla's published ground clearance data, and measurements when I lowered my steel coil car. See photo above of my car, once lowered...
That was done by relocation the c-clip on the shock body, and the end results were interesting. Even though all four corners had a 1.5" delta on the c-clip, the fronts actually took a 55mm average drop, and the rears a 32mm average drop. That is to say the 38mm drop applied to the shocks did not have a 1:1 ratio of drop to the car. I don't recall what my shop measured from but I think it was fender to center of wheel, not to ground. (Their measurements for before/after drop are in the 630-680mm range, and I can definitely find out what they were measuring for me).
Either way, the bottom line is that the spreadsheet they gave me for the coil suspension changes are here:
Based on this data again I am using a rough average to just roughly say 55mm F and 32mm R .... and Im going to assume that my old car, built Spring 2014, would have ground clearance that matches TeslaMotors.com current claim of 5.65 inches total (143.5mm). Since my plan would be to drive my car in Normal most of the time, I'm going to then compare to 129.5mm (5.1 inches that artsci had posted above).
What I found interesting then was that Mark @ Airmatic says the current links will lower the front 35mm as a minimum (And artsci you can confirm this? or did you just measure and then modify, without installing?)--- but if that is indeed accurate, my coil spring car had a net clearance of around 88.5mm in the front after the drop. Using that 129.5mm Normal air suspension, and the 38mm expected drop, the net should be 91.5mm after. This means it will be almost identical to the lowering my coils had, when driven in Normal. If that is indeed the case, then my alignment accomplished last time should be pretty similar. see here:
It was actually the front camber that was out of spec, but as it matched the rear I was okay with that (and prob helped me for handling purposes). But that was only a 32mm rear drop. This time around I'd probably match the rear to the front, going with a 38mm drop there-- and the car already starts off 14mm lower. My fear is actually going to be the rear camber, which I corrected last time with the EVSE links and have a set this time to do it all again. The only thing I might do then is lower the rear SLIGHTLY less than the front, which isn't ideal probably from an "engineering" standpoint (same lowering at all four corners seems more logical). But it will help two fold, first in adding some rake which might add in hard acceleration minimally, but more so, in keeping the load more forward and in turn potentially alleviating the rear camber issues from going low.
If anyone has any thoughts, inputs, corrections to my info, please let me know. Again, artsci hope my thread-jack here isn't a problem... just seemed like this was a good conversation already going about the links, and since I have the same ones in my hands here, I figured we could perpetuate more discussions on the matter.
Ciao! - Ari
