Outer Limits 4x4 Board

Saw in an old version of Yota monthly Kym Boulton has bump stops on his with a hydro ram down the middle to allow him to change it on the fly... if he is doing fast sections V heavy articulation sections.

Anyone seen or used or know about em?

I had a look/play with some at 4Way a few months ago, they look pretty sexy and are the stuff for offorad buggies and racers like Kim's macine but they are big $$$ and if you put them on anything other than a competition machine it's pure wank factor.


I want some

Is the ram hydraulic or pneumatic? The air can compress (duh!) to allow the ram to "spring", but hydraulic doesn't. As the ram compresses where does the fluid go?

Cheaper solution may be large bore pneumatic cylinder - vary the pressure to adjust the "spring strength" - don't know how long it would last...

Scott

NJ SWB wrote:Is the ram hydraulic or pneumatic?

I think they are both, like a short, very stiff shock absorber - oil and valving to control rate and a separate gas bit for compressibility.

Or poor man adjustable bumpstops out of /80/100 series rear.

more and more obc guys are using these.
the red swb patrol turbo out of jpc in melb has a very nice front setup.
twin 88 series konis externally mounted in the stock position and the bumpstop mounted inside the spring at the top.
just the thing for pounding desert tracks FAST
i saw a air valve type of assembly on the truck so i guees his are air operated??
mark from jpc was allways helpful in my dragracing days, so maybe give him a call?
his mate birdy with the gq turbo ute may have them as well??
jpc in thomastown, melb.
david

yeh i seen quite a few people with em in GQ's
they seem to run twin konis and then the adj bumpstop
would be grouse 4 goin fast over bumpy bits
ring cheezy i think hes fitted a few

modman wrote:more and more obc guys are using these.

yea the article was on Kym Boultons OBC truck...

Was more interested to see if anyone was using them here, more to tell people they are out there if need be..

I agree with wank factor for use on a road car..

They are air operated according to the article.

modman wrote:more and more obc guys are using these.
the red swb patrol turbo out of jpc in melb has a very nice front setup.
twin 88 series konis externally mounted in the stock position and the bumpstop mounted inside the spring at the top.
just the thing for pounding desert tracks FAST
i saw a air valve type of assembly on the truck so i guees his are air operated??
mark from jpc was allways helpful in my dragracing days, so maybe give him a call?
his mate birdy with the gq turbo ute may have them as well??
jpc in thomastown, melb.
david

Birdy doesnt have them on yet, there are 2 sets waiting to be fitted in the workshop for both his and our truck. The bumpstops are hydrolic with gas internally aswell, cant think of what type of gas right now will post some pics up in the members section, havnt updated our section for a while.

Drafty wrote:

modman wrote:more and more obc guys are using these.
the red swb patrol turbo out of jpc in melb has a very nice front setup.
twin 88 series konis externally mounted in the stock position and the bumpstop mounted inside the spring at the top.
just the thing for pounding desert tracks FAST
i saw a air valve type of assembly on the truck so i guees his are air operated??
mark from jpc was allways helpful in my dragracing days, so maybe give him a call?
his mate birdy with the gq turbo ute may have them as well??
jpc in thomastown, melb.
david

Birdy doesnt have them on yet, there are 2 sets waiting to be fitted in the workshop for both his and our truck. The bumpstops are hydrolic with gas internally aswell, cant think of what type of gas right now will post some pics up in the members section, havnt updated our section for a while.

Nitrogen.

Juzza wrote:

Drafty wrote:

modman wrote:more and more obc guys are using these.
the red swb patrol turbo out of jpc in melb has a very nice front setup.
twin 88 series konis externally mounted in the stock position and the bumpstop mounted inside the spring at the top.
just the thing for pounding desert tracks FAST
i saw a air valve type of assembly on the truck so i guees his are air operated??
mark from jpc was allways helpful in my dragracing days, so maybe give him a call?
his mate birdy with the gq turbo ute may have them as well??
jpc in thomastown, melb.
david

Birdy doesnt have them on yet, there are 2 sets waiting to be fitted in the workshop for both his and our truck. The bumpstops are hydrolic with gas internally aswell, cant think of what type of gas right now will post some pics up in the members section, havnt updated our section for a while.

Nitrogen.

Thats the stuff, was thinking Hydrogen but that sounded wrong.

We have done a few at work and help alot by keeping the nose off the ground and digging in on landings. The adjustable ones are good as the nitrogen pressure can have more or less psi for different rigs.