Thread: Turbo Diesel, gentle cooling down or glazed bores ?

A few years ago, a member of AULRO did a test in his Disco, recording boost and EGT every ten or fifteen seconds. It was done primarily to look at the time lag between changes in boost and changes in EGT.

The results showed that very soon after turning off the highway onto residential streets, the EGT dropped significantly.

Turning into his driveway dropped the temperature even further.

By the time he stopped in the carport, temperatures were low enough that just the time taken to apply the handbrake, remove his sunglasses and undo his seatbelt was more than enough cool down.

People whose driveway is only metres away from a high speed freeway might need a bit longer. Normal suburban driving at legal speeds with a couple of intersections seems to do a lot to reduce EGTs.

If modern turbos were damaged by shutting down quickly, wouldn't there be a huge number of failures in the large number of vehicles driven by mechanically ignorant people, some of whom don't even know whether their engine is fitted with a turbo?