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Subject I didn't really want to debate turbo timers or their purpose
     
Posted by LitlElvis on January 24, 2009 at 6:31 PM
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In Reply To it still will not be cycling engine oil! posted by gt300zxtt on January 24, 2009 at 02:09 PM
     
Message But...

As far as I'm concerned, the primary purpose of a turbo timer is to idle an engine for a short amount of time to allow a turbo(s) to be cooled down by absorbing heat via the cooling system.

Since the heat capacity* of the coolant flowing through the CHRA is twice that of oil, AND, the volume of coolant flowing through the CHRA is arguably much greater than the oil volume (~0.030" oil restriction), one might deduce that coolant is the primary media for absorbing the heat that is conducted into the CHRA. The fact that oil is still flowing while the turbo timer lets the engine idle is irrelevant, the heat that the oil absorbs is miniscule compared to what the coolant absorbs and carries away.

Soooooo.... after all of that, someone might see that one of many benefits to an electric water pump is that it can run independent from the engine, circulating the coolant and preventing heat soak not only to the turbos, but also to everything else that's under the hood.

*heat capacity = the amount of heat required to raise the temperature of one gram of any substance by 1°C without causing a phase change (no solid to liquid, or liquid to gas).

     
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