Black Greddy Turbo Timer [GRD-15500022] Designed to prolong the life of your turbocharge, while adding connivance. GReddy Full Auto Turbo Timers allow a vehicle to idle the engine for a timed period, with the ignition key removed. This conveniently allows the engine oil and turbo center cartridge to cool down properly and prolong turbo and oil life. This can be done by two standard programmable count down presets (P-1, P-2), or the GReddy Full Auto Timer can use its two auto timer modes (A-L, A-H). The modes estimate the driving RPM according to the vehicle's alternator signal and then recommend a count down time.