The turbo button in Drift Hunters is a feature that allows you to customize the car's turbo pressure. Firstly, we can see the “TURBO” option (after upgrading the turbo) in the tuning menu which allows us to customize the turbo pressure. We keep this to the max, as we like ALL OF THE POWER, but if you're getting started, you may find that lowering the turbo boost (pressure) will make the car more predictable. Secondly, we can see that there is an option for BOOST which gives us access to additional fuel and ignition timing settings. This is where we start to see some real gains in performance.