Not managing a consistent framerate above 25FPS (this throttles the physics core down to slow motion, which will be deceiving).Not using an appropriate FOV angle for your screen setup (specially if using a single screen).Not using a first person cockpit camera.The lack of speed sensation can be explained by any of the following:
If you add the G-forces app to the UI, you can verify cars generate realistic values during cornering, braking and acceleration. That said, most realism-related complaints can be explained by a lack of speed sensation. For this, facts and data are most welcome, as it’s the only sane way to improve the physics core calculations and the vehicle setups.
First of all, rest assured that physics realism is one of our top priorities! We are always open to criticism, and are delighted to be proven wrong and corrected.