Can anyone 'splain how to measure "Arch"??

[ree]

Originally Posted by stagger_lee

Unforunately you have to do the math above to insure proper spring rate.

I wasn't advocating doing no math. I was really questioning if you had to remove it from the vehicle. I assume you measure the length along the spring from mount to mount (with a cloth tape) and straight line distance between the mounts....and then do some math. Do you have to do it with the load of the truck on it, or with the spring under no load?

[stagger_lee]

Originally Posted by ree

I wasn't advocating doing no math. I was really questioning if you had to remove it from the vehicle. I assume you measure the length along the spring from mount to mount (with a cloth tape) and straight line distance between the mounts....and then do some math. Do you have to do it with the load of the truck on it, or with the spring under no load?

Sorry, yeah thats what ment in previous post when I said to measure at full droop, or with the load off of the springs.

[Desert Dan]

Generally it would be better to build a whole new spring pack made up multiple leaves than just adding an add-a leaf.

The ride would be better and the spring rate more progressive

You could also add a second stock leaf under the main leaf to give a little more load capacity. Ive done that on Jeeps and Toyotas.

One down side about springs under the axles is that the more leaves you have, the lower the u bolt spring plate and skid are as far as ground clearance