a device which can leave the engine on for a desired time while u can lock and leave the car (no need to wait inside the car) in order to cool down the turbo
an electronic device that allows your car to keep running at idle by itself after the ignition has been turned off with the key
an electronic device which permits the car to run for a fixed length of time after the ignition has been shut off
A turbo timer is a device designed to keep an automotive engine running for a pre-specified period of time in order to automatically execute the cool-down period required to prevent premature turbo wear and failure. After a period of driving when a turbocharger has been working hard, it is important to let the engine run at idle speed for a period of time, allowing the compressor assembly to run down in speed and cool from the lower gas temperatures in both the exhaust and intake tracts. At the same time the lubricating oil from the engine is able to circulate properly so the turbine won't burn the lubricating oil that would otherwise be trapped within the charger with the turbine rotating at high speed.