FG comfort

alan

Explorer
Hi Engineer, A friend of mine worked with a shocker company for ten years, he was saying a single shocker on each corner is not capable of handling the loads and forces experienced in continous off road conditions on the average 4wd, so what hope does a truck have.
 

PKDreamers

Adventurer
I am pretty sure if the shock is foam cell Pedders source them from Cofap which are made in few places around the world and are a good shock.Gaberiel are ok shocks but they make one of the best steering dampens you will find thats why you will find alot of people put their name to them.
Monroe(oz made) are always a bloody good shock with a No Fault warranty the best warranty around in oz. Yes bilstein same the warranty but i have heard before they dont put their money where their mouth is.
A problem with alot of shocks is that people find a shock the right length compressed and extented and fit them and dont take in account of what valves have been fitted. I think that may be the case with the Billie's fitted.
Koni's can be valved in nearly any way you want and are rebuildable at a price but they still bend or get holes in them like the rest of them.
 

alan

Explorer
Hi Pete,
A friend of mine is the australian agent for cofap, they don't supply pedders, they supply a lot of others EFS,TERRAIN TAMER, and for a long time TJM but no longer, as TJM source rubbish from china, must have been a 50cents cheaper. nothing wrong with Cofab we have been fitting them for 15 years and would be lucky to have 5 warranty claims over the years.
 

alan

Explorer
and of course everyone knows monroe make OME shocks, we have found monroe shocks the valving is always to soft.
 

alan

Explorer
another point to remember with bilstein's is where other shockers overheat and fade so naturally you slow down, bilsteins keep going until they destroy themselves.
 

PKDreamers

Adventurer
Hi Allan,
That makes sense cos we are starting to sell a few more EFS shocks and every one seems very happy with them.
o i would say Cofap could also make Power Down truck shocks too.??? which i might try on our Fg.
 

alan

Explorer
Pete not sure if they make powerdown shocks, but I will ask. not all EFS shocks are Cofap I think some are sourced alsewhere, Cofap were very slow to make coilover struts.
 

whatcharterboat

Supporting Sponsor, Overland Certified OC0018
Standard Canter shock on the left.

3930648635_72a1bb2d11.jpg
 

engineer

Adventurer
Hi guys,
I can tell you that the Bilstiens failed miserably, And the dimensions of travel are the same as the Pedder, or Gabriel shock (maybe there was 2-3mm more on the bilstien)
What I can tell you is that 1 Shock per corner is enough, The spring does most of the work. In the case of a Coil, or worst still, piston or bellows airbag is that the lack of friction to reduce the rebound rate, makes them somewhat more difficult to dampen.

In my experience, Leaf springs seem to handle the loads better on corrugated roads, giving better feedback to the monkey trying to keep to Itinerary. We tried this , that everything, but you need to look at the whole package, Set up for what your doing, and In most of our cases we can because our (FG's), meaning your and my FG's are not used to go to the supermarket, or drop the kids off at school, even though we may do it for fun from time to time.
BTW, Tried the Powerdowns, as they were the only shock that lasted on the 0303 rear engined mercedes buses that we converted to 4X4 for fraser island, and they were 4 bag rears and 2 bag steers.....But no good on Cape York, overheated and dumped the gas, just like the Bilstiens.
 

PKDreamers

Adventurer
[)
Yours look pretty serious there john, how good is the warranty ;-)[/QUOTE]

And Cost????????????????? which is always big a factor aswell

:coffee:
 

whatcharterboat

Supporting Sponsor, Overland Certified OC0018
Ahhh, the old oil damper, loved them for Fraser, 3-6 months and chuck em!!! (the ones on the left!!)

Haha. When old Ronnie (from Fraser Adv Tours) was alive he would come around once a year to our workshop and load up a wheelbarrow full of the original ones we'd pull off when we'd do our suspension jobs. I miss old Ronnie.


Yours look pretty serious there john, how good is the warranty ;-)

Chocko , they were made for Kenworth road trains doing corrugations on the Tanami track and up your way. On a little Canter they are hardly working so I don't imagine too many complaints. The guy who builds them doesn't want any dramas either. So if there has been any problems, he's been right on to it. He's a pretty fair dinkum sort of bloke so I imagine we won't ever have any issues with not standing by his word. They are a piece of cake to change the valving or rebuild too. A spares kit nearly fits in a matchbox.

We get on really well. I'm going to have a go at all the electrics on his race buggy soon. That'll be a challenge. Active suspension too with 28" of travel. . The race buggy runs a different type of shock to these. They look like a hydraulic ram. About 65mm shafts and are full of air . No springs. One of the Husqvarna motorcross teams is running them with plenty of success and the Australian downhill mountain bike champ runs them as well.

The orange one in the pic is from the coil conversion but we've got them in the standard Canter and Isuzu length too. The leaf spring shocks run less compression dampening and more rebound than the ones for coils.
 
Last edited:

alan

Explorer
Engineer you have already proved one shocker a corner is not enough, and I agree leaf springs cope with weight a lot better than coils. you can drive a leaf sprung 4wd without shockers no problem, a coil 4wd near impossible, the shocker does so much more work with coils.










Hi guys,
I can tell you that the Bilstiens failed miserably, And the dimensions of travel are the same as the Pedder, or Gabriel shock (maybe there was 2-3mm more on the bilstien)
What I can tell you is that 1 Shock per corner is enough, The spring does most of the work. In the case of a Coil, or worst still, piston or bellows airbag is that the lack of friction to reduce the rebound rate, makes them somewhat more difficult to dampen.

In my experience, Leaf springs seem to handle the loads better on corrugated roads, giving better feedback to the monkey trying to keep to Itinerary. We tried this , that everything, but you need to look at the whole package, Set up for what your doing, and In most of our cases we can because our (FG's), meaning your and my FG's are not used to go to the supermarket, or drop the kids off at school, even though we may do it for fun from time to time.
BTW, Tried the Powerdowns, as they were the only shock that lasted on the 0303 rear engined mercedes buses that we converted to 4X4 for fraser island, and they were 4 bag rears and 2 bag steers.....But no good on Cape York, overheated and dumped the gas, just like the Bilstiens.
 

dzzz

Hi Engineer, A friend of mine worked with a shocker company for ten years, he was saying a single shocker on each corner is not capable of handling the loads and forces experienced in continous off road conditions on the average 4wd, so what hope does a truck have.

U500 has a single shock. A very big single shock. I think it's a function of surface area first and the fluid volume. Don't know why that can't be done in a single unit on each corner.
My experience with engineers is that they get used to something like shocks in a certain range of sizes and sometimes don't consider much bigger or much smaller. John's shock is a good example of "what if we make it a lot bigger". Some things scale very well. A straight forward calculation of needed surface area to maintain a given fluid temp may be all that's needed. A shock may other wise be mechanically fine for the load.

I have wondered if coil springs can be machined more finely to a specific load. What percent of a good suspension design is the coil?
 

whatcharterboat

Supporting Sponsor, Overland Certified OC0018
And Cost????????????????? which is always big a factor aswell

Hi Peter. Looks like you've got the hang of posting pics now. Well done. The last couple of campsite pics look great. Thx for posting.

Cost. Probably like 3 Konis but they're more than 3 x better if that makes sense. We find they're a bit too good in fact and on a couple of the trucks doing really hard driving , we've had too beef up the top and bottom shock mounting pins. But then a few of the mines are saying lately, they 've been cracking the rear shock mounting tube on the new models even with the standard shocks.
 

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