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Discussion Starter · #1 ·
All,

Was having a discussion with a cowaorker the other day. He was sure that the Minis' have a built in turbo timer, and I told him that there has been no indicator of such a system on my car and that I have to let it cool down after a period of enthusiastic driving before turning it off.

Input? It's a non-S
 

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What's a turbo timer, there is no need to let it cool down before switching off. There is an electric pump that circulates coolant throughout the engine until it is cool enough after the engine as been shutdown.
 
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Discussion Starter · #3 ·
What's a turbo timer, there is no need to let it cool down before switching off. There is an electric pump that circulates coolant throughout the engine until it is cool enough after the engine as been shutdown.
That's essentially a turbo timer. The timer keeps a form of a cooling system running in order to cool the turbo. Some turbo timers just kept the engine running for a set amount of time after you shut off the engine in order to cool the turbo.
 

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All,

Was having a discussion with a cowaorker the other day. He was sure that the Minis' have a built in turbo timer, and I told him that there has been no indicator of such a system on my car and that I have to let it cool down after a period of enthusiastic driving before turning it off.

Input? It's a non-S
Doesn't do any harm letting car idle for a short period. As it is with most people this takes place anyway when driving slowly into your drive or garage.


Used to be the case of idling when some of the earlier turbo cars didn't have a coolant feed round the bearings like my phase 1 Renault 5 GT Turbo from the 80's. The heat soak would start to fry bearings over time if not treated properly.


As cavemandave says nowadays there are systems in place to prevent these things , although you still wouldn't switch of straight away after bouncing of the rev limiter with joy in your Mini!!
 

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I do not think the new mini has an electric pump too cool the turbo after the engine is turned of. The previous mini did. Here i do not here a pump. A turbo timer is to time boost i think...
 

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That's essentially a turbo timer. The timer keeps a form of a cooling system running in order to cool the turbo. Some turbo timers just kept the engine running for a set amount of time after you shut off the engine in order to cool the turbo.
A timer is something the operates for a set duration, the cool-down system is temperature and not time based.
 
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Discussion Starter · #7 ·
A timer is something the operates for a set duration, the cool-down system is temperature and not time based.
http://en.wikipedia.org/wiki/Turbo_timer

A turbo timer is a device designed to keep an automotive engine running for a pre-specified period in order to automatically execute the cool-down period required to prevent premature turbo wear and failure. After a period of driving when a turbocharger has been working hard, it is important to let the engine run at idle speed for a period, allowing the compressor assembly to cool from the lower gas temperatures in both the exhaust and intake tracts. At the same time the lubricating oil from the engine is able to circulate properly so the turbine won't burn the lubricating oil that would otherwise be trapped within the charger with the turbine rotating at high speed. With regard to modern automotive turbochargers, the need for a turbo timer can be eliminated by simply ensuring the car does not produce any 'boost' (during driving) for several minutes prior to the ignition being shut off. Most turbo timers are based on digital electronics.
 

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It seems to me the engineers at BMW/MINI have accounted for the turbo cool down period. Haven't you ever tried turning off your car and it would not respond to use of the toggle switch; but, if you kept trying, it would finally work? I'm pretty sure that is why. Only way to know for sure is to contact mini.
 

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@[email protected] can you confirm the existence of a pump that recirculates coolant in the turbo after shut off?
They were in the R56 but they are not in the F5x models as far as I know. The coolant pump supports both the generator and the climate compressor, the drive units also have a more compact design.
 

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They were in the R56 but they are not in the F5x models as far as I know. The coolant pump supports both the generator and the climate compressor, the drive units also have a more compact design.
???????????

If you look at this (even though its a 1.5d engine) there is a coolant pump, a oil pump and a water pump.

http://www.realoem.com/bmw/enUS/partgrp?id=XN32-EUR---F56-Mini-Cooper%20D&mg=11

So there are 3 different pumps.

The climate is a different compressor

http://www.realoem.com/bmw/enUS/partgrp?id=XN32-EUR---F56-Mini-Cooper D&mg=64
 

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whats a turbo timer? it allows the system and spool from the turbo to be cooled and released so there is no back up and ***** up the engine. however he stated he does not own a "s' which means no turbo, aka no need for a timer
 

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huh?

All,

Was having a discussion with a cowaorker the other day. He was sure that the Minis' have a built in turbo timer, and I told him that there has been no indicator of such a system on my car and that I have to let it cool down after a period of enthusiastic driving before turning it off.

Input? It's a non-S
why would you even ask this turbo timer question if you dont have a turbo mini? lol you stated it's a non "s"
 

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All f series minis have a turbo, the r series did have a turbo timer ie coolant continues to be pumped (or oil) when hot and stopped and in the garage-I can hear it on ours-never heard it on our f series though so I always drive in to our village slowly so it can cool a bit! Shouldn't need it I dont think as am sure mini will have thought about it re the stop start etc! but xxxxxxxx
 

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Still an interesting subject, and in the case of the Cooper 1.5T this is the first ever water cooled aluminum turbo housing designed by Continental.
It seems with this solution it was possible to reduce cost by avoiding heat resistant alloy steels , and as a result heat shielding external components was less complex due to having a water cooled housing.
I would believe the highest temperatures in the turbine shaft/oil are lower in this 1.5T compared to the 4 cylinder alloy steel turbo housing.
The 1.5T should be less sensitive to idling before turning engine off

Would be interesting to find historical data to compare turbo failure rates for 1.5 3cyl vs 2.0 4cyl mini engines.
 
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