Update 2017-01-02: I’m now updating FFB information over on my Secrets of iRacing post.

IrFFB can feed the 360 Hz steering column torque data recently made available in iRacing telemetry to your wheel, upsample and apply low-latency digital filters to the standard (60 Hz) iRacing FFB output and modify the feedback via a number of effects based on live telemetry. It can also drive a 'Jetseat' and fans if you have them. Once that is set, go into the Spring Force menu again and select the Step 2 test again. It will run the test as before, only this time it will use smaller force steps, using the slider value as the maximum force to test. Once this finishes, you’ll have another file with more detailed results. In my case, you can see the result this time is 524. 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 when new cars enter the service. Force Feedback Diagnostic Program This is a small utility program you can download to test the force feedback capabilities of your joystick. If FS Force doesn't seem to be working properly, you can use this utility to test your joystick, which can be helpful in determining if the problem is with FS Force, your system, or your joystick.

Update 2015-02-26: I’ve been changing up my FFB settings in iRacing lately after realizing that linear ffb resulted in such low force strengths (to avoid clipping) that I wasn’t really feeling the road anymore. The ffb changes were just too subtle. So, because I have a low-end wheel, a G27, I’m now using non-linear ffb and doing the usual binary-search to find the optimal force strength to avoid clipping. I’m doing this only because of my relatively low-end, entry-level G27. I expect the recommended usage for higher strength wheels (T500s/T300s, Fanatec ClubSports, Accuforce Pro, etc.) should still use linear ffb.

Update 2015-02-26 – 2: For the record, a binary search is one where you take your current value, determine whether it’s too little or too much, and then double it (when too little) or halve it (when too much), and repeat that process at each new level to dial in on your optimal value. For example, for iRacing force strengths I might start out at 32, decide that’s too much and go to 16 (half of 32), decide that’s too little and go to 24 (16 + 8 which is half of 16), decide that’s too much and go to 20 (24 – 4 which is half of 8), decide that’s too little and go to 22 (20 + 2 which is half of 4), decide that’s too little and go to 23 (22 + 1 which is half of 2), decide that’s too much and go to 22.5 (22 – 0.5 which is half of 1). This is a real example I just did in iRacing a few minutes ago on the Mazda MX-5.

Update 2015-02-26 – 3: Nvidia users should check out these threads: iRacing graphic optimizations for NVIDIA users, Guide: nVidia iRacing Antialiasing (AA) Settings, NVIDIA SLI Compatibility results. The second guide about AA gives some good settings for Nvidia Inspector (I use in-game 4x AA with Nvidia Inspector AA – Mode “Enhance” and AA – Setting “8xS [Combined: 1×2 SS + 4 MS]”. Read the thread for what they mean). The third thread is about SLI and getting rid of microstuttering (I use Nvidia Inspector “SLI Compatibility Bits” = “0x00402015” per the thread). It’s not perfect but it’s better than in-game AA and should give higher performance.

I’m a big fan of iRacing sim racing and I frequent their forums quite a bit. I’ve seen a number of posts, over time, on the iRacing forums about people asking for the right force feedback settings for their wheels. As it turns out, this info in its complete form is harder to come by then you might think so I’ve decided to post everything I know and have implemented for my Logitech G27 for force feedback in iRacing…

David Tucker, staff at iRacing.com, worked on the Logitech G27 force feedback and he indicates they put a lot of effort into making the G27 “optimal” out of the box:

I recommend the defaults in the driver (100% for everything) and 900 deg of rotation. It use to be the case that you needed to mess with the driver but a long time ago I made sure that the defaults in the driver would be optimal.

In addition to everything default in the profiler, in-game I use linear force feedback, which is supposedly technically more accurate feedback, a Min Force of 16.6% (this number is very close to every other G27’s calculated Min Force so it should work for you), Strength 32 (for a Mazda MX-5 Cup but it depends on the car, my Lotus 79 and Ruf use 20), and Damping 0% (because I want my feedback sharp not dulled).

We’re almost done but there’s one more tiny thing we need to do that made a world of difference for my force feedback:

“I hate the chatter but I really wanted to feel the road and straights are the best indicator around the center to tell if you’re actually feeling everything.” -Matt

In your case you may want to go back to the old min force method….You can go back to the old method by setting app.ini [Force Feedback] FFBUseSimpleMinForce=1 -David Tucker

You should be able to find the app.ini file in your Documents folder under the iRacing folder. For example, my app.ini is here: C:UsersMattDocumentsiRacingapp.ini

Copy and paste that file to make a backup copy in case you want to go back. Then open it in notepad and find the line that starts with “FFBUseSimpleMinForce=0” and change it to: FFBUseSimpleMinForce=1

A note on fine tuning strength in-game: Hit the F key while driving to get the force meter up. It’s the green/orange/red meter that’s always going up and down according to your wheel’s current strength output. To get optimal strength and detail out of your wheel start with a low strength and keep increasing it. You will notice your force meter hitting red more and more often as you drive – red means maximum output and it means the game wants to output more but your wheel can’t handle it (you’re losing feedback detail at this point which is not good, it’s called “clipping”). Keep increasing your force strength until the force meter only flashes red (clipping) for split seconds in your sharpest cornering. This will be your optimal force strength for your wheel.

Enjoy!

PS. You might find my post on force feedback settings for Sector 3 Studio’s RaceRoom Racing Experience informative as well!

PPS. This thread over at the iRacing forums provides a good, detailed introduction to force feedback in iRacing.

Update 2017-01-02: I’m now updating FFB information over on my Secrets of iRacing post.

Update 2015-02-26: I’ve been changing up my FFB settings in iRacing lately after realizing that linear ffb resulted in such low force strengths (to avoid clipping) that I wasn’t really feeling the road anymore. The ffb changes were just too subtle. So, because I have a low-end wheel, a G27, I’m now using non-linear ffb and doing the usual binary-search to find the optimal force strength to avoid clipping. I’m doing this only because of my relatively low-end, entry-level G27. I expect the recommended usage for higher strength wheels (T500s/T300s, Fanatec ClubSports, Accuforce Pro, etc.) should still use linear ffb.

Update 2015-02-26 – 2: For the record, a binary search is one where you take your current value, determine whether it’s too little or too much, and then double it (when too little) or halve it (when too much), and repeat that process at each new level to dial in on your optimal value. For example, for iRacing force strengths I might start out at 32, decide that’s too much and go to 16 (half of 32), decide that’s too little and go to 24 (16 + 8 which is half of 16), decide that’s too much and go to 20 (24 – 4 which is half of 8), decide that’s too little and go to 22 (20 + 2 which is half of 4), decide that’s too little and go to 23 (22 + 1 which is half of 2), decide that’s too much and go to 22.5 (22 – 0.5 which is half of 1). This is a real example I just did in iRacing a few minutes ago on the Mazda MX-5.

Iracing Test Pc

Update 2015-02-26 – 3: Nvidia users should check out these threads: iRacing graphic optimizations for NVIDIA users, Guide: nVidia iRacing Antialiasing (AA) Settings, NV

Iracing Force Feedback Test Program