[RDK_YJ88]

What rear axle are you running? Any pictures of the install? What did you do for abs/stability sensors?

 

[RDK_YJ88]

Looks good. Dana 60 front?

 

[RDK_YJ88]

I don't understand how the bump stop will do anything with just air/nitrogen? What does the dampening? The only resistance in the whole setup is the spring you're using to push the piston back down. That spring rate is the only thing dictating the stiffness on the bump stop. Air won't dampen like hydraulic oil.

 

[RDK_YJ88]

Why not make them bottom to replace your current bumps? I got a little carried away when I drew them up and have around 6in of travel... I think I going to scale down to about 4.

As for dampening I'm hoping forcing the air through the holes in the piston will provide dampening. I think me and the op are on the same page with thag.

I'm going to experiment with different piston set ups and using air, air/light oil, and pure oil.

That won't work. You won't have enough volume of air to dampen anything. If you want to use just air, don't put any holes in the piston. This will compress the air and become more stiff the further it travels. Think of it as an air cushion. You can tune the compression with air pressure, but you cant tune your rebound. You also won't need a coil spring in there. This is what they are building in that pirate thread.

If you want tune-ability, with holes in the piston and a shim stack, you need an oil. This is what Fox, King, Bilstein, Profender, FOA, etc use.

 

[RDK_YJ88]

I guess I just don't get how I won't have enough volume, it'll be too similar dimensions of production bumps and they have enough volume

Sent from my XT1060 using Tapatalk

In the production bumps an oil does the dampening. The nitrogen is used to push the piston back out, and more importantly it keeps the oil from foaming under repeated rapid movement. If you use a compressible fluid (air or nitrogen) you will need a lot of volume and travel of the piston to get any dampening.


I'm all for building your own parts, that's why we drive jeeps and not a Prius. I'm looking forward to seeing what you come up with. Your on the right track with your idea. Try it with compressed air or nitrogen, if it doesn't work how you planned try adding oil and air.