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HKS Turbo Timer Kit
HKS Turbo Timer Kit
Turbo Timer: An electronic device which permits the car to run for a fixed length of time after the ignition has been shut off. It's sort of the reverse of a remote car starter, which runs the car before the ignition is switched on. Turbo timers usually have user-selectable run times and can usually be installed around car alarm systems.
The purpose of the timer is to allow the turbocharger additional cool-down time before the engine is shut down. The idea behind this came from the discovery that turbocharger systems can get hot enough to 'cook' the oil left in the turbo oil lines after the engine is shut off. The simple solution to this problem is to circulate oil for a longer period of time after the turbocharger has heated up. The turbo timer simply automates this process so the car operator is not forced to wait in his/her automobile until the desired cooling-down period has transpired.

Driving patterns could also have a significant effect on the need for a timer. Folks who travel at high speeds almost directly to their destination will have higher turbocharger temperatures at shutdown than those who are required to wait at three or four stoplights or who drive through residential neighborhoods at low speeds before shutting down. Ambient temperatures and vehicle modifications will also play a role.

There are several arguments against the necessity for turbo timers. There have been significant improvements in turbocharger design and oil formulation since the time turbo timers were concieved . This includes the advent of pure synthetic oils, which are more resistant to the turbo heat and free of impurities (such as waxes and varnishes) which contribute to cooking problems. Turbochargers are also more precise and better lubricated than in previous designs. These facts are often cited as evidence for the case against turbo timers.
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