Many years ago, a car racing sim friend and I built a very DIY no frills rocking chair that I hooked up to a sim. The racing sim was open enough that you could output the lateral acceleration via serial port (I may have written that serial glue code too)

The sim spoke to an Arduino that controlled a car window motor that rocked the chair's seat (with a pot to encode the position and some limit switches at either "end" of the motor's run). According to my racing sim friend, the lateral Gs are one of the most crucial things to feel to get a physical hold on what's going on with a car (if you're taking a curve too fast, etc.)

Video: https://www.youtube.com/watch?v=sE-NYWIl37M Photos: https://imgur.com/a/1k1mNac

Whenever I see typically expensive racing sim hardware setups, I wonder if there could have been some potential in developing this idea further (I'm comfortable enough with the electronics software side, but torque/motor PID/etc. are well outside of anything I've worked on)

Anyone interested in collaborating? :-)