Outer Limits 4x4 Board

Just a quick question , i have airbags in the back of my gq shorty and i was wondering if anybody knew what pressure i can pump them up to.

go to your local dealer...........but i think its about 8 psi ??????

i checked them the other day and there is 10psi in them

I was looking at a display last week and thought it said 8psi.......but i wasnt paying much attention

factory airbags??? really? cool, where do i get some!

i am pretty sure they are aftermarket, apparently the owners before me use to tow horse floats

what sort of air bags ?? black (matt) rubbery sort of ones, that totally replace the coils, or red poly ones that sit inside the coils ??

The red PolyAir ones are recommended 5psi min and 30psi max

Dan

like dan said !!!
if they are the red POLY-AIRS , max 30psi
if there the black (tougher lookin rubber ) 100psi max !!
fitted some to an F250 the other day !!!

Not to throw a spanner in the works of primary colours, but there is also a blue bag, similar to the red 'Polyair' bag, same material, same pressure specs.

thanks guys , they are red polys inside the coils . Does anyone know if i can leave them in if i put a 4 inch lift in?

Should not be a problem, I'm assuming you have less than a 4" lift atm. You might need some black spacer blocks to put under the bags (coil seat on the diff) if you want the bags to be more effective (go to your local Opposite Lock store - they should have some) but the bags will be okay if you don't use them. I run them in a '6' inch coil without a problem. Word of advice - when you go wheelin don't run the bags at full pressure. If you have standard bumpstops, at full compression, depending on the construction of the coil, you might (slim chance, but you never know) pinch the bag between the compressed coil rings. At full compression the bag is also under considerable pressure - you might pop off the line. Nothing major, but a pita to attach the line again.

Polyairs, what a piece of crap they are. I bought a pair to help correct a bit of suspension sag. First, the supposed bolt on kit didnt, despite it supposedly being the correct kit. Then, despite correct pressures being maintained, low 5psi, high 30psi, (I even bought a new low pressure gauge to check this) one bag got chaffed by the mud between the bag and the retaining coils in the kit. When returned to the supplier, and then forwarded to the Qld distributor, the wombat in Brissie argued that they wearnt supposed to be used in a dirty enviroment. I laughed at him, as they are marketed extensively for use under 4wd's. A 1000km round trip to confront the guy personally, saw him eat his words, (he had no phone to keep his anonimity) when he saw the installation instructions giving impossible directions for installation, and the ruptured bag replaced. This, mind you, after only about one months use. More use with the replacement bag saw another rupture, and the kit removed and consigned to the rubbish tip. Worst waste of a couple of hundred bucks I have ever spent.

Half of the problem I see with the coil over bag kits to be used with leaf springs, is the coil spring used is there to control the 'bagging' of the bag, not necessarily add more carrying load to the assembly. Because this coil wire is of a small diameter, there is little surface area against the bag, hence the increased likelihood of rupture due to chafing.

In a standard installation (coil sprung vehicle) the coil has a larger diameter wire, therefore more surface area to support the bag. I've no doubt that even with the larger coil wire surface area eventually the bag will chafe/puncture, but that may take a long time, in which case I would have got my money's worth. Also with a coil vehicle the coils tend to 'travel' up and down the bag, dislodging and ejecting small stones and debris that may puncture the bag.

Good on you for gettin' stuck into the wombat. I hate some of those 'knowledgable' salesmen.

Thanks area54, i only have a 2 inch sus lift atm. I find the bags pretty good, pumped them up when the 4by was full the other day and you can tell the difference, ive had no problem with them.