Originally Posted by jeremywes
I watched the video and respectfully disagree that "Hand tight" is the best method for setting preload. I prefer starting from zero preload (first point from which the spring has no vertical movement) and then use a set of calipers to set the amount of preload. This way is much easier to repeat with accuracy.
With the weakest guy on the planet we'll get to no vertical movement with hand tight. With a body builder or professional tech (Popeye arms) we'll end up with four or five mm of pre-compression on the fronts. Either way we get to the desired goal of a minimum
pre-compression. This is not all that different from your method to set the pre-compression as there will be variation in the way people measure.
What is mission critical is that we have a minimum of 10mm pre-compression in the rear and 2mm in the front and use the monotube to adjust height. If we end up with 12 and 4 or 11 and 5 we are good to go and light years ahead of the inconsistent installations being done in the field. Based on the tech inquiries we get, we have 10% of Pedders Xa and Supercar coilovers installations using the lower coil seat for ride height adjustment