FFB Rattling on straight wheel

[Gevatter]

I have a question that maybe someone with some insight into the inner workings of ACs physics can shine some light on for me. And I hope I can explain my issue properly

In a few select mod cars I have the problem, that my wheel rattles when I drive straight, as if a was driving over a gravel track. It's maybe three or four of all the cars I have installed. Examples would be the URD Mercedes CLR LM or to a lesser extent the little Miker F-Junior (in the Miker it's more the occasional jolt that a constant rattling). It feels like there is constantly some force coming through the suspension, even on a flat track on low speeds, eg in the pits. I can still feel the "bumps" when turning the wheel. It's independent of track choice, and will also happen on tracks where other cars have no such issues. It is comparable to having huge flatspots, but of course coming out of the pits this shouln't be the issue here. It gets less noticable the higher speeds I go or the farther the wheel is turned.

I played with suspension settings in setup but those don't change anything. Reducing FFB gain helps matters, but usually I have to reduce it by ~30% which makes the overall FFB very light.

The loud "rattling" part itself comes from my wheel, so please disregard that. I'm more interested if anyone has an idea where those forces may come from and if I as a complete AC physics noob can do someting about it other that reducing FFB gain. See my FFB settings in the attachment:

 

[HypoToad]

Post what wheel you have, this will help assess the problem.

 

[Gevatter]

Oh I forgot I don't have it in my signature here. Although, as it only happens with a handful of mod cars I don't think it has to do with my wheel apart from the noise it makes, but that's not the issue, rather where the effects are coming from in the first place.

Anyways:

Fanatec CSL Elite PS4 with P1 rim, G25 Pedals, SSH Shifter.
Wheel Settings:
SEN - set manually according to DOF of car
FFB 90
FOR 100
SHO 100
DRI -1
Everything else OFF

 

[Cote Dazur]

From what you describe in your first post it seem obvious it is related to a few mod cars not acting properly, the better question would be either is every one also feeling the same with the same mod or has someone found a way to make those mod driveable.
If you are not familiar in dealing with the suspension.ini in the car folder you are probably not going to be able to fix anything. My advice is forget about those or ask the modder in the support tab of the mod post for a fix.
I also have a Fanatec wheel and I prefer dri at zero and den in off, AC will set the proper value automatically.

 

[Gevatter]

From what you describe in your first post it seem obvious it is related to a few mod cars not acting properly, the better question would be either is every one also feeling the same with the same mod or has someone found a way to make those mod driveable.
If you are not familiar in dealing with the suspension.ini in the car folder you are probably not going to be able to fix anything. My advice is forget about those or ask the modder in the support tab of the mod post for a fix.
I also have a Fanatec wheel and I prefer dri at zero and den in off, AC will set the proper value automatically.

To be honest, I don't think I ever had this effect with my old G25, it had very weak center forces. A friend tried the URD CLK and had the same phenomenon. Whenever the car moves, if only with ~5kph, the wheels acts like you go 200kph with heavily flatpotted tries. The effect actually gets weakter the faster you go. Seems almost like the FFB clips across the wheel's straight line.

My question to the physics modders was alluding to the physics files, if they may have experienced this issue themselves and maybe know if there is something in the files that can be looked at and "easily" be changed or experimented with.

The only mods that really have this problem are beta mods, unfinished/unrefined and sometimes quite old with only the tyres updates to v10 presumably. Waiting for updates is definately the ultimate solution, tho a workaround would be nice if one existed

 

[Michael Hornbuckle]

The URD CLK exhibits that behavior for me also, but with my ffb settings I can barely feel it. With my settings it feels like it is simply a super stiff chassis transferring road noise through the wheel, nothing particularly upsetting or jarring about it.