Foam Cell or Gas Filled shockies

Submitted: Saturday, Jun 14, 2008 at 19:13
ThreadID: 58778 Views:12673 Replies:4 FollowUps:3
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Whats your opinion on foam cell shocks. Heard they fail quicker then gas on corrugated roads. Is this true, what is the better out of the two. I am thinking of going Ironman foam cells or maybe Tough Dog or Rancho adjustables. The first test will be the Gibb Road so dont want them failing on me out there. Vehicle is a Cruiser 75 Trayback, not the most comfortable ride so want a rather good set of shocks.

Any thoughts are welcome, really need to make up my mind so i can order them now.
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Reply By: Member - Olcoolone (S.A) - Saturday, Jun 14, 2008 at 19:46

Saturday, Jun 14, 2008 at 19:46
Whats better Waeco or Engle...much the same question with much the same answer.

All have good point and all have bad points.

You might want to add to the list mono tube or twin tube.

Any good brand shocker will do much the same and last just as long as each other.

If it was a competition vehicle it might be a different story.

Sorry I can't shed more light on the topic but it comes down to personal choice and nothing else.

Old Man Emu, Tough Dog, EFS, TJM, Rancho, all about the same.

Koni and Bilstien are in a class of there own.

I am not a big fan of adjustable shockers, how do you know what setting to use and how many times are you going to adjust them.

Again differant story if it was a competition vehicle.

A shocker should be valved to suit the spring and the spring should be designed for the corner weight of the vehicle and the whole suspension set up should be designed for the vehicle use.

I'm sure people will say this is the best or that is the best but at the end of the day they will all work as well as each other and last just as long.

Why do you want adjustable shockers?

Regards Richard

AnswerID: 309976

Follow Up By: tukka - Saturday, Jun 14, 2008 at 19:57

Saturday, Jun 14, 2008 at 19:57
Adjustables so i can adjust them to suit the conditions. Roads up here are nothing like the city roads down south or over east. Bitumen is hardly better then the gravel roads. As for twin tube and mono tube i would say twin tube, as i just want a reliable yet cheaper alternative too Old Man Emu and others. Am getting the Ironman springs so guess i will probably go with Ironman shocks, just wanna know what the good and bad points are with foam cell and gas.
FollowupID: 575960

Follow Up By: Member - Olcoolone (S.A) - Saturday, Jun 14, 2008 at 20:43

Saturday, Jun 14, 2008 at 20:43
The biggest problem is most adjustable shockers is when you adjust then you are adjusting compression and rebound at the same time causing a compromise in what a shocker should do.

A true adjustable shocker will have separate adjustment for compression and rebound.

Don't be fooled thinking you are getting something better because it is adjustable.

A foam filled shocker works more like a standard oil filled shocker, an oil filled shocker will out perform a gas shocker in handling but will over heat very quickly if used in high demand application.

A nitrogen/oil filled shocker will not handle as well but will not over heat quickly if used in demanding conditions.

A oil/foam shocker has the best of both worlds by giving you the benefit of a oil filled shocker that does not over heat quickly to a certain degree.

I would put foam filled over adjustability.

But there are some very good oil/gas shockers around and most competition one are oil/gas due to the extreme heat that is generated.
FollowupID: 575982

Follow Up By: Gronk - Sunday, Jun 15, 2008 at 16:07

Sunday, Jun 15, 2008 at 16:07
Unless it's a racing type of shock, an adjustable shock has only adjusment for rebound NOT compression !!

If you read thru Koni's literature, the adjustment is purely for dialling up more rebound dampening for when the shock ages and loses some of its effectiveness..

Thats not to say you can't dial up some "hardness" from the word go, just that you will have less to play with later on in the shocks life..
FollowupID: 576140

Reply By: Rossco td105 - Saturday, Jun 14, 2008 at 20:20

Saturday, Jun 14, 2008 at 20:20
G'day Tukka,

I'm no expert but from what I can gather, a foam cell shock will be destroyed if overheated for an extended period in a loaded vehicle. An oil/gas shock will slowly lose damping ability the hotter it gets, and regain damping ability if it is allowed to cool. It would have to be treated pretty badly to be destroyed.

A twin tube shock has less oil volume than a mono-tube (of similar size) so will have less ability to absorb heat and not maintain damping ability for as long.

A properly set up spring/shock combo to suit the driving YOU are doing will work well in all conditions if used with some common sense (If you want to travel all day on corrugations at high speed in a loaded vehicle you may need a better set of shocks than if you did the odd gravel road drive).

I'm sure others will correct me as required,

Hope this helps,

AnswerID: 309983

Reply By: Tony - Sunday, Jun 15, 2008 at 07:08

Sunday, Jun 15, 2008 at 07:08
I had Ironman Springs and Foam Shocks om my 47 Troopie, and never had one fail in 8 years of Outback touring. They were the non-adjustable shocks.

This setup gave a very good ride when loaded up for a trip, but a bit firm when M/T. Trips done were, 12 months around the block. CSR, the Tip 3 times, High Country twice a year for 7 years. So all in all a good suspension package.
AnswerID: 310025

Reply By: feraldisco2 - Sunday, Jun 15, 2008 at 17:45

Sunday, Jun 15, 2008 at 17:45
foam generally seem to be firmer than gas - gas is a better option for rough roads/corrugations I reckon.

OME are a reasonable all-rounder at a reasonable price, but if you want to really change your ride, you're going to have to change springs as well as shocks.

Bilsteins are the ultimate and a offer better ride/handling than even Konis which many people find to be a bit harsher.

Gorget about Ranchos unless using purely for long-travel firetrail work - they're not at all durable for touring work...
AnswerID: 310135

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