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Never owned a turbo car, but I though you are supposed to let them idle before shutting the engine down so the turbo's bearing get to coast down/cool a little while the engine oil is still pumping thru the bearing. An alternative to that is you add a oil accumulator that discharges after the engine is shut down, it then releases it's oil into the bearings.
If P&G w/EOC you'll be fairly aggressive on throttle while pulsing then shutting down the engine with turbo spooled cutting it's oil supply while it's still spinning. Myself I'd be a little leary of doing that.
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