GEN 2 Live Valve stiffness

[codeman]

Has anyone noticed when you fill your tank full, the live valve shocks (2020 stock Raptor) become noticeably stiffer?

The ride on-road is much smoother and more compliant when I have a 1/4 tank or less. The ride is great; when I fill the tank it's noticeably more jarring on-road. Tires are down at 35/33psi front/rear.


Would this point to needing a live-valve reset? Would resetting the ride height / shock system at half a tank do anything or is this entirely by design? Makes sense as well that with more fuel, the shocks would stiffen a little but you'd like to think the system would adapt and account for fuel/load weight to keep a consistent suspension feel. Guess not?

 

[EastEndAngler]

As a 2020 owner, I always notice new "harsh ride" posts. There are several threads going that discuss this. I believe the live valve reset requires a value input for the fuel level in IDS and asks for the truck to be completely empty of passengers. Under that school of thought, the truck should be able to adjust/account for fuel level in regards to compression/rebound/stiffness. Perhaps @FordTechOne can chime in.

 

[DFS]

I don't ever notice my 2020 suspension as "stiff". They do handle on road turns with less body roll much better than previous gens, though I still think they are far from "stiff"

 

[FordTechOne]

As a 2020 owner, I always notice new "harsh ride" posts. There are several threads going that discuss this. I believe the live valve reset requires a value input for the fuel level in IDS and asks for the truck to be completely empty of passengers. Under that school of thought, the truck should be able to adjust/account for fuel level in regards to compression/rebound/stiffness. Perhaps @FordTechOne can chime in.

During the ride height calibration procedure, the fuel level is networked from the instrument cluster to the VDM. The VDM also factors in the fuel level when calculating suspension settings as the vehicle is being driven.

 

[codeman]

Would you ever see a need to reset the ride height calibration from stock? It's hard to tell for me what's "normal" as I don't have another Raptor to compare, but I can really feel the difference in the seat with a full tank versus close to empty. I do have a bit of racing background; so I feel like possibly I notice handling characteristics more than "average" I would say.

 

[2020Raptor]

During the ride height calibration procedure, the fuel level is networked from the instrument cluster to the VDM. The VDM also factors in the fuel level when calculating suspension settings as the vehicle is being driven.

Wow...that is some fancy tech right there !

I would really like to understand how the whole system functions.

Is there a comprehensive description somewhere ?