Thread: coil overs?

Hi

What do you mean by coil overs?? I have seen coils over leaf springs

This is a coilover. Its a spring and shock in one unit.

The last 2 are in a D90, but I included them because they are inclined like stock shockie, whereas it is normal to mount coilovers above the axle housing.

You should consider all of the ramifications before mounting a coilover on normal rangie/disco shockie mounts.

A method that I had wondered about was fitting the coilover to Disco2 shock turrets over the coil perch - I've never investigated the fit though.

you might be surprised at the size of the coil required to hold up 700kgs---

Originally Posted by Pedro_The_Swift

you might be surprised at the size of the coil required to hold up 700kgs---

They're 2.5" ID, so about 3.5" OD depending on wire.

yep,, and thats the limiting factor,,

The shockie size is limited by the inside diameter of the coil,,

JUST AS AN EXAMPLE---


This is Neville Taylors (from Brendale!) year old american Jimco,,
The coils are maybe a touch bigger than Slunnies sizes,, but because of suspension contraints such as tyre size they have to run basically a simple inner strut/coil holder, a double set of coils and a second dedicated shockie.

I think what I'm trying to get at is coilovers only work up to a point, while they can be bought off the shelf require a lot of sorting, spring rates, fluid density etc,, are they nitrogen charged? do you have access to this?

questions and more questions,,,,






The point is,, coilovers are just an option,

Originally Posted by Pedro_The_Swift

yep,, and thats the limiting factor,,

The shockie size is limited by the inside diameter of the coil,,

JUST AS AN EXAMPLE---
This is Neville Taylors (from Brendale!) year old american Jimco,,
The coils are maybe a touch bigger than Slunnies sizes,, but because of suspension contraints such as tyre size they have to run basically a simple inner strut/coil holder, a double set of coils and a second dedicated shockie.

I think what I'm trying to get at is coilovers only work up to a point, while they can be bought off the shelf require a lot of sorting, spring rates, fluid density etc,, are they nitrogen charged? do you have access to this?

questions and more questions,,,,

The point is,, coilovers are just an option,

I tend to agree with you and don't think that there is a real need to run coilovers for the sake of running coilovers, and street/bush trucks I tend to think don't really benefit from them when you compare the engineering required to fit them in comparison to what is achievable with factory setups. The biggest benefit will probably be bringing the top of the spring up higher than that of a standard spring perch, but if you're needing that then you'd be going exo/buggy type of thing anyway.

To be fair though, a desert racing machine needs suspension that is well in excess of what a street/trail truck needs. These things are pounding through corrugations, bumps and whoops at break nexk speed with big rubber and constantly using the full suspension travel that is permitted. Its as tough on a shock as you can get whwn yo include the jumping. The single shock would fade into oblivion and they need to run the full bypass deck like that so that they can set the suspension up properly to react as best as it can in racing conditions and for that track on that day. A trail rig just doesn't do that and a social vehicle doesn't require that level of refinement or adjustability - the additional shock is pretty much the domain of high speed dirt racing where a single shock will handle damping fine, it just doesn't have the same capacity for sheer heat dissipation. Double coils is also standard practice on long coilovers as they need the guide in the middle to control the springs. In terms of setup, the coilovers shouldn't be any different to a regular setup. Its still just a regular monotube shock in essence like any other Bilstein or whatever and the shock valving, oil, gas pressure will be similar. Caluculating spring rates with dual springs is a little more complex, especially if different rates are used, but there are calculators which will do this for you - they work out ride heights, rate transitions, anticipated travel etc and will also base this on the installed angles etc.

Its airshocks that I think are the black art.

But, as I said at the start... I agree with you and tend to think that they're overkill for a fullbody street truck and not necessarily the path I would take unless setting it up to do comps.