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Old 05-08-2012, 05:34 PM   #11 (permalink)
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Quote:
Originally Posted by Frankencar View Post
I don't think the turbocharger would like that much.
Why? Happens every time you shut down the vehicle anyway. If you use good quality synthetic oils and the proper viscosity in the vehicle you really don't have to worry much about oil coking.



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2002 VW Jetta TDI 5-speed(completed 01M-5-speed swap at 155K miles) 45 MPG City with the 01M, 5-speed 60+ MPG City. Nokian Entyre Low RR Tires. Experimenting with the "Hybrid" 205 Deg F T-stat:

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Old 05-08-2012, 05:41 PM   #12 (permalink)
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Originally Posted by Josh8loop View Post
Why? Happens every time you shut down the vehicle anyway. If you use good quality synthetic oils and the proper viscosity in the vehicle you really don't have to worry much about oil coking.



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I'm just thinking that accelerating up to speed and immediately cutting the engine will stop oil flow and air flow of a turbo that has just seen the high EGT of acceleration. Maybe this mod would be a good excuse for a big GTB2056VL or other water-cooled turbo and an additional electric water pump.
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Old 04-25-2018, 04:08 AM   #13 (permalink)
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I know this is a very old thread, but would squirting water on to the turbo housing provide any benefit for engine shutoff? Or is it primarily the shaft that transfers the heat.
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Old 08-13-2018, 12:29 PM   #14 (permalink)
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Quote:
Originally Posted by teoman View Post
I know this is a very old thread, but would squirting water on to the turbo housing provide any benefit for engine shutoff? Or is it primarily the shaft that transfers the heat.
I think the worry is more about shutting an engine down after being on throttle, so it's still spinning pretty fast, but with no oil pressure to lubricate the shaft. It would wear out the journal bearings faster.

But to answer your question it think it wouldn't do much, as its more about the heat inside on the shaft/seals/bearings getting coked from being stagnant in a still very hot turbo if the engine is shut down, so spraying the housings wouldn't do anything.
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Old 08-13-2018, 04:05 PM   #15 (permalink)
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I think some newer cars have systems to prevent this. There are aeveral motors still whirring after the engine has been shut off.

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