Intro to fitting 35s (< 3" Lifts for those that wheel and love alignments)

Preload by definition changes the load (and thus the compression) on the spring at full extension. See my comment about dirt bikes above.

https://accutuneoffroad.com/articles/spring-preload-matters/

BTW, all coil springs are "linear" unless you introduce coil binding or some other mechanism that changes their spring constant over their range of motion. This was a problem I once studied in Physics class long ago. Leaf springs can do this by introducing extra leafs at specific ranges of motion. I actually wrote an english lit paper on the mythical "progressive spring" and my prof actually liked it. Hah!

 

Ummmmmmm leaf springs are not linear and some coil springs are not linear. That's physics, how tight the windings, size of windings, and thickness of the windings, and then leaf length and thicknesses make them progressive rate. Now onto coil bind you then have no spring on the vehicle and are essentially using the tires as the springs, we ran this set up when I circle track raced. We also ran a progressive rate rt side spring. Also coilovers if you do a dual springs they become progressive rate with the slider stopper and how you set it up. Like I said you may want to do more learning other than an english lit prof liking a paper and basic physics. Take a mechanical engineering physics and actually understand all the geometry and non physical planes that act on a vehicle. I've built and ran everything from an outlaw 10.5 mustang to circle track cars to go carts.

 

Think what you like. I can explain all the physics for you if you are interested; albeit it's been many years since I thought in detail about the problem.

The only "progressive" coil springs I know of vary the distance between the coils such that the coils on one end progressively contact each other (bind) as the spring compresses. This is very similar to how some leaf springs work.

https://www.2wheel.com/progressive-...FhU1czCgfThDbAYM6gHrb_nt9tj7GmIUaAkEQEALw_wcB

Also see this explanation of spring preload:

https://accutuneoffroad.com/articles/spring-preload-matters/

 

Thanks for proving my point appreciate that. So now onto the topic at hand myself as well as others have tried explaining stuff to you and you seem uninterested to "educate" yourself as you put it but more interested in trying to disprove what we are saying. We have suggested actually getting out there for some hands on and reading and getting a better understanding.

 

I find your tone condescending and I am trying to be patient with you; but I think I am reaching my limit. My final word for you is that one sign of intelligence is knowing what you don't know.

 

Sir I'd go back and reread all your posts.

 

Lololol this is great

 

I think he's done.

 

This is exactly right.

I think we all respect the fact that you received equal education in physics as the rest of us but unless you have a PhD and working in a research lab, the one course you took in HS or even college is pretty meh tbh.

I think you have asked some good questions but you have a lot left still to learn.

 

It's falling on deaf ears. Soooooo.......

 

Not gonna, lie. I think I'm kinda done with the guy.

 

Yeah I'm done since his last post.

Another note I was looking at making my own but leave it to LSK
https://www.solomotorsports.com/sho...-parts/toyota-w-y-coilover-shock-hoops-front/

 

I hope I am not misunderstanding what you are saying is correct. It is not correct that the spring constant of a coil spring depends on how much it is compressed. The force needed to compress a spring is given by:

F = -kx

where:

k = spring constant
x = displacement

The spring constant for a coil spring (k) is dependent on many things (length, coil diameter, material, etc), but none of them are dependent on the displacement (x). They are all constants.

You can understand this intuitively by understanding that the entire coil spring moves as a single unit. Even if the coil diameter varies over the length of the spring, all coils work together to exert force. The relative contribution of each coil does not change as the spring compresses.

You can create a "progressive" spring system using a coil spring(s) in various ways. One is to construct the coil spring such that the coils contact each other one at a time as the spring compresses. This changes the effective length of the spring and thus changes the spring constant. Another way is to use a lever system that changes the mechanical advantage on the spring over the range of motion of the suspension. This is how some dirt bike suspensions work. A third way is to use multiple coil springs in a configuration where at full extension only one is doing work and then as the suspension compresses additional springs are added.

Am I saying anything incorrect here? It's been quite a few years, but I used to get paid to teach basic physics to college students. I was a lab teachers assistant.

OP, I am sorry I helped drag your thread off topic.

 

So you have never heard of dual rate coils?

 

Don't we all?

I'm thankful to you for answering my questions. I hope I can repay with some of my own knowledge.

 

No, but a quick google suggests they are like the coils I described previously. The coils bind one by one to change the effective length of the coil and thus the spring constant. That or they don't do what is advertised.

There is a tremendous amount of bad information and bro science on the internet including on this forum.

 

I only brought up this progressive spring topic because ovrindkull's comment about linear springs reminded me of something a studied in college and wrote both a technical physics paper and a english lit short story about. It has really nothing to do with fitting 35" tires on a truck. Sorry for dragging things off topic. lol

 

d00d, you not need a PhD in physics to understand this topic. It is freshman college physics at most. The physics was well established in like the 1700's (don't quote me on the century). Modern physics researchers don't bother themselves with topics like this anymore. They have bigger fish to fry. Sorry for sounding condescending, but it feels like you are being the same to me.

 

Sup. What did i miss? Gonna get up to speed