Does this still work? RaceRoom Racing Experience (R3E) has a VR mode, this is a brief look at the current implementation. To enable VR in R3E you simply add "-vr" to the Launch Options (under Properties in your Steam game list). You may have to ensure the headset is your primary display, and that you have selected 1920x1080@75Hz in the video options. Turn off Motion Blur as it currently causes problems. As always, it is essential to maintain 75fps, so you may have to turn down other graphics settings.
Oculus changed their runtime so it needs DX11 to work. I believe this was needed to support the Asynchronous Time and Space Warp functions which make a massive difference in how smooth it runs.
Can't play any sim without VR anymore. That's why i didn't touch R3E too often in the last two months. Looking forward to their implementation