School me on TJ Bump Stops

[Fishtaco]

So ok its all a learning curve!

The few I have spoken to in OZ have 2 plus inch lifts on 31,s but have not put in bigger bump stops? One guy at works son is running 3 inch lift with 32,s and hasn't changed bump stops without any problems. All the aussie lift kits spring or spacer do not include bigger bump stops but most US ones do?
Is this due to most aussie off roading is on sand/fire tracks and US off roading prepped for rock crawling?

Cheers.

 

[someguysjeep]

the bump is to stop full hard compression of components or incidental contacts.

so if your axle can stuff to the top end of your shocks and not touch anything, that's clean from contacts.
if it does touch, the touch needs relieved or the bump needs set to stop it just shy.

if your can stuff the axle to the top end of your shocks clean, then 1 might choose to add enough bump so the shocks can reach that point but can't be slammed up to that point. the bump is set to contact (in some instances compress) when the shock limits.

you kinda wanna consider how hard your jounces are too. if it's a hard bump or a mushy bump. those big fat yellow barrel rear jounces don't seem to compress as much as the front black cones and the squish would be considered in the travel action where the hard bump would be a limit.

 

[Irun]

Bump stops are simple, but you have to do some work to know much to use. Removing the springs and shocks, then cycling the suspension is the only true way to know whether you need bump stops, and how much. As @someguysjeep said, the jounces can play a role, depending on the material they are made of.

That said, my guess is in your area of the world you're not fully flexing the suspension on a regular basis. One thing you want to look out for is to not use the shocks as a way to limit travel. This will result in damaged shocks.

 

[jjvw]

Bump stops are simple, but you have to do some work to know much to use. Removing the springs and shocks, then cycling the suspension is the only true way to know whether you need bump stops, and how much. As @someguysjeep said, the jounces can play a role, depending on the material they are made of.

That said, my guess is in your area of the world you're not fully flexing the suspension on a regular basis. One thing you want to look out for is to not use the shocks as a way to limit travel. This will result in damaged shocks.

The shocks on mine are the hard limit to the suspension travel, not the bump stops. The bump stops are there to slow down the last bit of travel speed as the shock reaches full compression. None of this matters much for slow speed rock crawling. But I suspect people in Australia like to drive their TJs fast over rough uneven ground, where further slowing down the shock's travel speed before full compression might be advantageous.

The bump stops should be lengthened in order make the jounces to their job of slowing the shock down beyond what the valving can accomplish.