Just a thought..I been sitting and waiting for atleast 2 mins before I shut my car off. Then came across my mind Turbo Timer. I had it on my STI before and works great so I was thinking about having one on C250.

Anybody here tried this mods?

Is oil coking on modern turbos still much of a problem. I would think you should be safe with the stock setup as long as you take it easy the last couple minutes/miles before parking?

Unless its a huge turbo and you've been tearing up the roads just prior to parking it's completely unnecessary. Drive normal for the last mile of your trip and you're fine.

No need to wait on the c250 small stock turbo. Bigger high performance turbos and heavy boosting yes I would wait... but on the puny c250 nope... even my stock bpu supra tt, I never waited and the car is fine.

Agree with most of the above.

The TT was for the days when turbos were not water cooled, and was designed to keep engine running after you turned the key off for oil cooling. I put a thermocouple on a turbo bolt (83 SaabT) and found that using it to keep the rad fan going cooled the turbo better than letting the engine idle the same amount of time. But that was for the old turbos with no water cooling. Water cooling with oil lubrication on oem turbos started around 1984.

As they said, back off the power about 1 mile from home. The water will boil in the turbo, pulling off huge amounts of heat, and cause thermally induced water flow through the turbo.

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size of the turbo has nothing to do with it. on a smaller turbo is when you want a timer cause they work the hardest. spooling up much quicker than larger turbos heats them up alot faster, great idea but you will acheive the same thing if you take it easy a few miles before you get to your destination. mainly non liquid cooled bearing turbos get the most out of a timer as they run the hottest under normal driving conditions

2min is too long to wait, even turbo timers are usually 30seconds to 1min. I was going to add a TT but after searching around I was told that these cars were designed with the average user in mind, ie those that don't know squat about turbo care and therefore would not idle the cars prior to shutdown. I wouldn't worry too much about it, honestly, use good oil, keep up your maintenance and idle it about a 1 min if anything after a drive and you should be fine.

+1 just cruise the last mile or so of your trip and idle for 30 seconds or so and youll be fine...2 mins is just a waste of gas.

You'll be fine, no TT needed. I have a turbo B200 which I still drive since 2007 and I drive it like no tom. (peppy little sucker!) not a single problem on the engine just maintain it well and feed it with the proper oil.

Tomorrow ... got it

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Ditto to shotgun_banjo, the B200 Turbo is, or was fantastic. Too bad the new B and even the A will start with the disappointing 1.6L engine producing 120 HP, while the old B200 Turbo puts out 190 HP.

The CV transmission ran the tach up to 5000 RPM and just held it there all the way through the range, which is where max HP is obtained. A real hoot to drive, and no, there was never any need to cool off the turbos. I know of no one who doesnt drive these tiny turbos flat out all the time.