Suspension And Weight Questions

[Derring-Do]

I've got a scale and a rig. Anyone have any thoughts on what and how to weigh to determine spring rate? I'd rather not dismantle the rig and get weights on unsprung axles, but I think I'm going to have to. Then I guess weigh the front and rear assembled with the rig sitting level. Then divide that info by the shock movement length.

[Ninomaniac]

take one spring off and balance a weight on it and measure compression?

[Derring-Do]

Sorry. I should have been more clear. I have known spring rates. I am trying to determine what weight of springs I should be using.

Spring should support the vehicle weight. While maintaining 60% of the shocks travel for compression, leaving 40% travel for rebound.

I'm just wondering what and how folk are taking said measurements.

[Ninomaniac]

they're probably not taking that measurement.
you're overthinking everything, judging by your 50 new threads. go drive your truck!

[Derring-Do]

Originally Posted by Ninomaniac

they're probably not taking that measurement.
you're overthinking everything, judging by your 50 new threads. go drive your truck!

I needed 30 posts for classifieds. Been lurking on here for 8 months reading and searching. Good info on here. Thanks for calling me out

[mewalsh100]

I've had good success by first installing the springs with no shock oil in the shocks to get the rate I want. You can then determine the total amount of sag you want to run - 20%, 30%, 40% etc. Measure the shock shaft total length extended from the shock body. Use a fine sharpie to mark your sag % on the shock shaft. Once the rig settles in to the point you've marked on the shock shaft, you've got the proper spring rate for your preferred amount of sag. Then, once your satisfied with your spring rate, throw your preferred oil weight in for rebound and good to go. I suppose you could do this with oil in the shocks as well as I've always done with dirtbikes, etc. But, I've been able to get a more accurate spring set up without when doing it for my RC rigs.

[jstein87]

Have been playing trail and error with my springs on my prolines but you could do it this way. Speaking of does anyone have the spring rates for proline powerstroke slash rear 103mm?