Turbos and cooling down

I just drive off boost the last half mile or so then give it 30 seconds to a minute to cool down.

143k on original turbo with a remap on for 40k and it's fine still.
 
Stormster said:
I just drive off boost the last half mile or so then give it 30 seconds to a minute to cool down.

143k on original turbo with a remap on for 40k and it's fine still.
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I also just drive the last mile or two gently, then turn it off as soon as I arrive. No need to idle.

Mines done 100K+ on the original turbo, and has been remapped for a few years. Turbo is still spot on.
 
Turbochargers are driven by exhaust energy.
Part of that energy is heat.
You don't create boost at idle and consequently you don't create as much heat
 
I just drive the car however I like and switch the engine off as soon as it's parked up and don't worry about cooling the two turbo's, I can usually here something still running under the bonnet when walking away from the car so maybe the car is continuing to cool itself.
 
coolant and oil temp never get hotter at idle ;)

and from what ive seen with exhaust gas temps they start to ramp up significantly when the engine is on load but even at idle youre looking at a few hundred degrees, so an idle/stationary car gets very hot under the bonnet quickly, hence imo driving the thing quietly for the last mile will be better than it being stood idling for 60 seconds, unless youve been belting 7 shades out of it
 
Thanks for all the answers guys

I do usually drive the last couple of miles or so at low revs, mainly because to get to my house it's through a lot of residential areas. So that makes me feel better
 
Matt82 said:
coolant and oil temp never get hotter at idle ;)
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Exactly.

Anyone with a radiator with a spinning thing called a 'fan' will tell you. Mine came on today in traffic, and thats at sub 5C as otherwise the the stop start would have worked and allowed cooling temps to drop.
 
Always advised to drive sensibly toward the end of your journey with any car, not just turbos I would say.

Personally I drive off boost for a couple of minutes, then once parked, yank key, let turbo timer count down of 30sec start, turn steering to lock the column, and then put on the steering wheel lock. By the time I walk off from the car it has already turned off or is about to. Works out perfect timing wise.
 
I think we can safely say if the car is stock then you can get in, drive, get out worry free.

IF the car has been modified, ie its running more boost than stock then you should let it cool down a bit before you switch it off, driving the last mile of your journey off boost is sufficient in my mind, decent oil is also a good idea.
 
Building Candy said:
I think we can safely say if the car is stock then you can get in, drive, get out worry free.

IF the car has been modified, ie its running more boost than stock then you should let it cool down a bit before you switch it off, driving the last mile of your journey off boost is sufficient in my mind, decent oil is also a good idea.
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I would completely agree with that. a bit of common sense, if you have been hoofing it, then allow the turbo time to spin down with a few mins of gentle driving rather than just pulling up and switching off.
 
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