Interior camera inertia is a setting that "pushes you back in your seat" as you speed up. It's a really cool feature that gives you a better sense of speed. However, currently, it's barely noticeable even at max(100%). I'd love if we could increase it even more.
The only way seems to be manually editing the script. Head into lua/ge/extensions/core/cameraModes/driver.lua, and look for this like: Code: self.physicsFactor = settings.getValue('cameraDriverPhysics') / 100 -- 0..1 multiplier Change the 100 to something else like 50 or 40. It does mess with the horizontal inertia as well though, hence why you shouldn't make this number too low