blankets and turbine insulating covers on it's turbos from the factory. The operators manual state specifically that the idle cool down after use should be no less than 25 mins on days cooler than 85 and 40 mins in 100+ degree temps since the heat that is trapped in the insulation make the insulated components hotter and the heat will travel to the CHRA making it and the oil and coolant hotter and not properly cooling it before shutdown will cause coking of the turbos and boiling of the coolant. This shut down procedure is similar to what a turbo timer does on a car. I'm guessing that since this piece of equipment has to be shut down with a longer cool down period because of the insulation, that the cool down period for your turbos probably should be extended as well if the insulation is installed for the same reasons.