For me with Oculus 2 and USB 3 link
i had the jittering head issue I then Disabled the Asynchronous Spacewarp and ASW options in the OculusDebugTool
it suddenly fixed the issue immediately for me and the game is very playable
But I do still get crashes after 15 to 20 mins or more minutes of game play. I got to lap 12 in a GP at Silverstone
I run at vr high on a 3080 gpu and i12600 cpu.
while trying to understand the issue I ran at VR ultra low, but after finding the ASW disable option and fixing the head jerkiness. I was able to ramp up the settings to vr high and was getiing 72 fps smooth consistently.
After some of the crashes I’ve struggled to get VR in car working again. The Origin game repair seems to resolve this so suspect the crashes occasionally corrupt the game files.