I started this for my own use, but today at Cars And Coffee in Charlotte the topic of lowering springs came up, and I mentioned my spreadsheet. Since there was some interest shown in it, I decided to put it up on Google Drive, and let everyone see/copy it.
Keep in mind, the ride frequencies are rough, I didn't take out the unsprung weight, and the motion ratio is from information gathered on the forum. I make no guarantees on anything, and I'm open to corrections.
https://drive.google.com/file/d/0B00...it?usp=sharing