Aftermarket suspension LX 570

[TeCKis300]

At its most basic level, this is the principle to how AHC works to support a load. My numbers are made up for the sake of discussion.

For an unladen LX, the hydraulic globes via the hydraulic piston (where the shocks would be located) and coil springs share the load to support the vehicle. Something like 50%/50%.

For the rated 1300lb payload of the LX, here's how the load is supported at neutral height:
650lbs on hydraulic globes
650lbs on coil spring

Increase the spring rate (e.g. violet springs) or preload of the coil spring and now:
650lbs on hydraulic globes
1000lbs on coil spring
Now the suspension will support 1650lbs at neutral height. AHC self adjusts damping to match as the system is dynamic.

 

[longranger]

At its most basic level, this is the principle to how AHC works to support a load. My numbers are made up for the sake of discussion.

For an unladen LX, the hydraulic globes via the hydraulic piston (where the shocks would be located) and coil springs share the load to support the vehicle. Something like 50%/50%.

For the rated 1300lb payload of the LX, here's how the load is supported at neutral height:
650lbs on hydraulic globes
650lbs on coil spring

Increase the spring rate (e.g. violet springs) or preload of the coil spring and now:
650lbs on hydraulic globes
1000lbs on coil spring
Now the suspension will support 1650lbs at neutral height. AHC self adjusts damping to match as the system is dynamic.

When folks say “violet springs,” are they referring to specific Eibach springs, if so — does anyone have a part number so that we can be sure we’re talking about the same thing, and also investigate different springs that may do similar/better job?

 

[bloc]

At its most basic level, this is the principle to how AHC works to support a load. My numbers are made up for the sake of discussion.

For an unladen LX, the hydraulic globes via the hydraulic piston (where the shocks would be located) and coil springs share the load to support the vehicle. Something like 50%/50%.

For the rated 1300lb payload of the LX, here's how the load is supported at neutral height:
650lbs on hydraulic globes
650lbs on coil spring

Increase the spring rate (e.g. violet springs) or preload of the coil spring and now:
650lbs on hydraulic globes
1000lbs on coil spring
Now the suspension will support 1650lbs at neutral height. AHC self adjusts damping to match as the system is dynamic.

Any idea how sport/comfort works? System pressure can’t be changing without impacting ride height, so are they changing the amount of restriction acting on the hydraulics in/out of the shocks?

 

[TeCKis300]

Any idea how sport/comfort works? System pressure can’t be changing without impacting ride height, so are they changing the amount of restriction acting on the hydraulics in/out of the shocks?

Yup. In addition, there's at least a couple other mechanisms at work. There's side to side and cross linked hydraulic circuits that restrict motion. Similar to KDSS but completely within the hydraulic mechanism. The front axle also has a secondary stiffer spring rate within the system by way of another chamber. To reduce brake dive and increase control.

 

[Squatchlander]

Hey folks,

Been lurking for a few months, but now that I finally purchased an LX570 (2009), I figured it was time for me to come out of the shadows. One thing that I'm confused about, is why people think Slee would figure this out. Aren't they primarily a metal fab and modification business? Given the various threads that I've read about AHC on the 570, it seems what's needed is an electrical engineer or computer science wiz. Or perhaps someone with a mechanical engineering background who's familiar with electrical systems. I'm a bit surprised with all of the geeks we have in the Bay Area, one of them hasn't taken this on as a side project yet. Hopefully that'll change soon

 

[turbo8]

Check out my thread, I think it may have been figured out.

Disabling the AHC and AVS systems, no warning lights.

I have deleted the whole AHC, AVS, and AFS(disabled) systems and been driving around since January 2020 without problems. Today I attempted the first steps into getting rid of the AHC/AVS systems, I think I was successful. I still need to do some more testing to make sure warning lights don't...

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