Two coilovers per corner

[WannaB-class5]

Can somone tell me the theory behind having two coil overs per wheel?
Pros and cons. And anything else for that matter.

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[ntsqd]

Can't see any advantage.
More unsprung weight, dampeners share dampenering loads, Min 4 springs to tune instead of 2 or possibly 3

I saw an old Rally Sierra RS that had two c/o's per corner. Speculation was that one of each pair had pavement valving and the other had dirt valving, and there was some method for turning whichever was not needed off. Makes some sense, but never confirmed it.

[Jeepspeedster]

I have only seen this on old buggies, like a old beam class 10 or 5 unlimited. and some Dakar race cars.
Back in the days when 2.0" foxes where used as coil carrier and there was no 2.5"s like 10 years ago.
There was only Kuster 2.0 and 3.0s

[WannaB-class5]

I agree that mostly I only see it on old rail type cars but I just saw that set up on what I think is a mexican owned class 10 maybe 13 (I am guessing here) and it looked brand new. That is the only reason I asked, otherwise I figured it went the way of the Dodo bird.

[desertracer]

Mcmillin's still race a car with 2 coil overs on the back...It seems to work very well.

[DailyPedal]

Rally cars often use the duals to save on space. A few off-road car builders specializing in lighter cars have also found a better choice of spring rates for the 2.0's than 2.5's and if they use 3.0's the springs may have to be custom wound to get the right rate (very expensive). But heavier cars need the strength (larger shock shafts) and oil capacity only found in the larger shocks.

[WannaB-class5]

I Don't know the numbers but wouldn't it be more expensive to run two coil-overs (even if it is just a coil carrier and not a dampner) than to get custom springs? Not a big deal I am just about to do the front of my bug and was wondering if there was some big advantage I was missing out on. Thanks for all the info.

[tsm1mt]

I Don't know the numbers but wouldn't it be more expensive to run two coil-overs (even if it is just a coil carrier and not a dampner) than to get custom springs? Not a big deal I am just about to do the front of my bug and was wondering if there was some big advantage I was missing out on. Thanks for all the info.

I imaigne if you got it *right* the first time there may be a cost savings with having a custom wound spring made.

..but what if you didn't get it just right the first try and had TWO custom springs made? or THREE?

vs. mix n' matching off the shelf coils until you're happy.

[Josh_K]

Thom,
“More unsprung weight, dampeners share dampenering loads, Min 4 springs to tune instead of 2 or possibly 3”

I can stand it! We have gone over this before! Every one know’s the plural of dampen when referring to dual coil over is dampeneringerdingers!

Josh