I am close to ordering a 2020 R8 v10, and have a choice of either getting Audi dynamic steering, which varies the steering *ratio* with speed and steering wheel input, or the standard (fixed ratio) power steering.
Does anyone have any experience on the track with dynamic steering?
How did it go? Is it predicable enough to hit apexes consistently?
This option has been around since at least 2017 on R8s, and in other Audis going back at least a decade.
Note dynamic steering is *not* about varying the power steering boost with speed (all R8 steering systems do that). Dynamic steering changes how much the wheels turn with a given steering wheel input.
This video explains what it does, and how the three modes, comfort, auto, and dynamic, work:
I tracked my last R8 about 10 days a year for 7 years, so have gotten to the point where I am reasonably precise, and fast, around the track. I was good enough that I could run with ESC all off, and still keep the car on the track :-), I ran R compound tires on dry days.
If you really want to understand how dynamic steering works, read this technical document. Dynamic steering is an interesting use of two strain wave gears (harmonic drives), one to step up turning angles by about 50X or so and the other back down again, then adding a coaxial motor to move the "static" part of the step down gear so that it effectively slows or speeds up the turning rate of the front wheels relative to the steering wheel turning rate.
This description and video are another take from Audi:
This shows how strain wave gears work. They are kind of magic: notice the deformed ring (three highlighted teeth) spin at a much slower rate, and backwards, relative to the inner spinning shaft.