Fitting 35’s with minimal trimming NOW ADDING LONG TRAVEL AND 934 CV’s

Not to mention if you're skating at coil bind at full compression.

 

I think this is how I almost ripped the seal cap out of my front shocks before I put straps on it. Some of the top outs I experienced before straps were wicked.

 

I misread your comment as "bottom outs." I'm tracking now.

 

technically there is room to fit two springs and a slider but I've been told there is no performance advantage

 

One thing I am confused on, If preload is the devil. What's the difference between a long spring vs a short spring of the same rate? Essentially you're going to end up with the same amount of pre load. No?

 

The amount of travel the spring has before coil bind.

 

But wouldn't it be near identical? Say you take a 16" 600lb and an 18" 600. That 18" is automatically going to have 2" more preload on it over the 16.

 

No, not necessarily. Not if you understand what preload is.

im making an assumption that you’re comparing them equally and ignoring the fact that you may have to preload the 18” a bit just to fit it on the shock.

 

Does this answer your question? I'm confused what you're asking

 

Please keep their misinformation out of this thread... I don’t care what there magical computer formulas have to say

 

How is that not the same as preload I guess. I know my current 650's have to be compressed a ton to get them off. Even if the adjuster was all the way at the top. Ideally wouldn't the object be to use the shortest spring possible that doesn't require much preload to achieve ride height? Maybe I'm not understanding this preload thing, but its just what makes sense in my head.

 

but but the colorful animated diagrams! haven't seen much else online that's simple and easy to see stuff in motion.

 

They fubarred my rear shocks real bad. Supposedly tuned for the archive kit and deavers. Came with 8/8 valving. It was horrendous considering its sitting at 20/10 right now. I wouldn't trust them with anything ever again. Though they did kindly offer to revalve them for a fee.

 

I have to give credit where credit is due. They do a good job at explaining concepts to the masses that others have previously failed at. Even if you don’t agree with everything they say.

 

They did a great job valving my rear smoothies.

This too, I like their tech articles. Helped me understand bypasses a lot more.

 

Take this all with a grain of salt, but this is my thinking on spring rates

A few basic formulas to keep in mind with springs are F=-kx (Force = -1 * Spring Rate * change in spring length from equilibrium [compression is negative, cancels out -1]) and Potential Energy in a compressed spring is converted to Kinetic Energy as the suspension unloads quickly where PE = 1/2*k*x^2 and KE = 1/2*m*v^2. So then 1/2*k*x^2 -> 1/2*m*v^2. Once the limit straps kick on full unload, then they become a spring of sorts as well, and the kinetic energy of unloaded suspension will then be absorbed as potential in them.

Obviously we have some lever action going on with the front control arms, but from the very most basic level, this explains a bit

So looking at F=-kx, higher spring rate and/or more preload can increase the amount of weight a spring can support

Looking at PE = 1/2*k*x^2, more preload will have an power of 2 affect on potential energy vs spring rate with a power of 1. So to harrys point of more harsh top outs, more potential energy will in turn increase kinetic energy when the suspension unloads, which then has to be absorbed somewhere when the suspension fully tops out. Either in your shock ripping itself apart, or a limit strap going taught very quickly

And with all that being said, I don't think theres a right or wrong answer to spring rate, it will vary by taste

and if I completely missed the ball on all of this, whoopsie

 

Yep, that went directly over my head.

 

essentially with F=kx, where K is spring rate, and X is spring displacement from equilibrium (read: preload). Increasing preload OR spring rate will allow a spring to support more weight. Which the group here understands. Facebook warriors, not so much which might be why everyone (outside of here) seems to love 700lb springs for supporting their fancy bumper

For the energy stuff, preload has a greater affect on the potential energy of a spring, than the spring rate. because preload is squared, but spring rate is only a factor of one

the point I was getting at was that, because numerically a spring behavior is based a lot off of those two factors, there really is no right or wrong to spring stuff. just a balance of persons application and taste

 

Yay springs! There’s probably some second order diff eqs for that somewhere, but in the meantime the basic math-

 

Also a side note, the units for spring rate would be a force/length. soo a 600lb spring would be 600lb/in?