A Turbo Timer's main function is to assist in cooling down the turbocharger to prevent oil coking in the center bearing cartridge assembly. Oil "coking" occurs when a turbocharger is not properly cooled down and the oil that normally lubricates the center cartridge heats up and forms solidified oil deposits. A turbo timer allows an engine to idle for a preset amount of time after the ignition key has been turned to the off position and removed. By allowing a turbocharged engine to idle, oil continues to pass through the turbo until it has cooled down to the point where oil "coking" will not occur. If you have any questions about the turbo timers that we offer or can't find what your looking for, then please contact us.