The BMW N54, and presumably other modern engines, uses an electric water pump, which they run after shutdown to keep the turbos cool.
stevenr816;1876633 said:You obviously have brought so much info to the thread.
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Interesting bit about the thermo siphon... learned something new today. Would suck to burn off any coolant from the sounds of it though.IJ.;1878189 said:Back in the dark old days cars didn't have a water pump and relied on "ThermoSyphon" to circulate the coolant, Turbo's use this effect after shutdown to disipate heat.
Modern Oils and Water Cooled CHRA's have pretty well made this a thing of the past, I know when I'm about the stop so I stay out of boost, I also run an Accusump and this will keep pressure for a minute or so on shutdown.