Originally Posted by
jlfx car audio
I did the spring balancing to both my scte, one of the lightest ever built, and my sons tlr scte. Tho it took 4-5 hrs toget both set up and have a stiffer option for tuning, I went with the absolute softest I could get on mine and my sonsi just looked for balance on the lighter side of stock since his truck had about 8oz removed from stock . Both trucks r amazing to drive I will say I got my scte about a pound to lite cause it just wouldn't hook up but it could be fast if smooth . Only thing with the softer setups was big jumps . Having to keep oil thin enough to react to the bumpy areas u really, or I didn't want to go thicker to keep it from slapping on landings . So can I get a explanation of pack and order of importance for finding oil viscosity. I'm sure its within this thread but .... loving the thread lots of info
http://users.telenet.be/elvo/
Not sure if you have seen this site, but I found it a nice reference to the concepts discussed here. The site is mirrored on two urls I believe, one of them has a downloadable version. Under Suspension > Page 2 it discusses fluid dynamics, which explains pack, and how to achieve different levels of it.
A lower viscosity oil with smaller piston holes, vs higher viscosity with larger piston holes, will have the same static dampening. Which is the dampening when say you press the car down on your work bench. But when the suspension compresses very fast, like landing off a big jump, the turbulence caused by the high velocity of the oil going through the piston holes, creates pack. That is it takes more energy to compress the shock. This happens to a greater degree with the light oil and smaller piston holes, as the oil will be moving faster through the piston holes for a given speed of compression. Check the site out, it explains it in more detail along with a lot of other things.