For the older controllers like the G27

Open theLogitech Profiler:

Oct 30, 2020 In the iRacing Software. Launch the SIM (in a Test session for example) Click Options and in the Drive tab. Set 'Enable Force Feedback' to on. Set Force Feedback Strength to 20% (you can adjust to your liking) Set Damping to 0%. Also please note the auto option for setting the force levels. Although not Logitech specific, it is the quickest way.
IRacingConfig is a free iRacing desktop app that allows you to edit all iRacing INI files simultaneously using a simple interface to create a single profile that you can edit, copy and apply to iRacing at any time. IRacingConfig was created to make it easy to manage multiple config profiles that you may need for different purposes such as VR racing, video editing, test sessions, watching.

Sound Shift for iRacing is software that provides audio cues for gear selection, brake force and rev limit. All can be adjusted and even muted if you don't want all cues. This service contains its own Sound Shift files for iRacing users to download and use for their installation. Especially useful. Force Feedback clipping is when the forces being sent to the wheel are so high that the wheel can't take anymore. It's basically like eating until you can't eat anymore. If you haven't already got it, there is a test program made by iracing to determine your wheel's optimal minimum force setting.

Driver fix license key. Click Options..Global Device Setting:

Set Overall Effects Strength to 100%

Set Spring Effects Strength to 0%

Set Damper Effect Strength to 0%

Enable Centering Spring in Force Feedback Games - uncheck

Set Degrees of Rotation to 900%

The newer G29, G920 and G930's for example - we would recommend leaving the defaults.

Evermotion 129.

In the iRacing Software

Launch the SIM (in a Test session for example)

Click Options and in the Drive tab

Set 'Enable Force Feedback' to on Digital photo frame mac.

Set Force Feedback Strength to 20% (you can adjust to your liking)

Set Damping to 0%

Also please note the auto option for setting the force levels. Although not Logitech specific, it is the quickest way to get your FFB feeling good.

Force Feedback Vest

Iracing Force Feedback Test Program