Realistic Third-Person Racing Game

I want to build a mobile racing game seen from a smooth third-person chase camera, and the one thing that must stand out is believable, weighty vehicle handling. Tyre grip, suspension travel, mass transfer—all of it should feel closer to a sim racer than an arcade title while remaining enjoyable with touch controls.

For the first milestone I need a workable prototype that runs on both iOS and Android, includes one detailed car, a simple test track, a HUD with speed and lap time, and an in-game panel where I can tweak core physics values (mass, downforce, tyre friction) in real time. Unity or Unreal are fine as long as you can achieve 60 fps on mid-range devices; if you rely on a different engine, show me proven mobile examples.

Deliverables
• APK and IPA builds ready for device testing
• Full source project with clean, commented code and setup instructions
• Short screen-capture video that highlights the driving physics and third-person camera work

When the handling feels right we can move on to extra cars, visual polish, and multiplayer, but the immediate goal is a rock-solid driving model that makes every lap satisfying. Please share links to past projects where you implemented realistic vehicle dynamics so I can see your approach to physics, optimisation, and control tuning.