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Caporegime
- Joined
- 29 Aug 2007
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- 28,768
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- Auckland
The alarm I had fitted has a turbo timer. Whenever I park, I generally have 'helpful' people telling me I've left my lights or engine on 
Turbos and cooling down
- Thread starter Steedie
- Start date
Most of the good quality ester based fully synthetic engine oils can withstand the temperatures in a turbo much better than they used to, so it's less of an issue now-a-days.
How often do you come screaming up to your parking space at full bore anyway.
There is absolutely no need to let the thing idle if you've been off the loud pedal in your village
How often do you come screaming up to your parking space at full bore anyway.
There is absolutely no need to let the thing idle if you've been off the loud pedal in your village
Depends if it's school home-time and there are school girls about or not
It's difficult with modern diesels. Their turbos run higher boost over petrol couterparts. Personally, I don't ever really bother idling after a run but if I do a short run I stay off boost where possible. Normaly I roll home the last half mile or so off boost
Soldato
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- 19 Oct 2002
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Who cares about boost? Most turbo petrols make more power anyway less efficiently and with higher exhaust temps, thats relevant to oil thermal degredation more than anything else.
My truck gets less than a minute at idle before I switch off.
(I get penalised if I let it idle for longer believe it or not!)
Given that sometimes, in certain situations, you can see the thing glowing under the cab (at night) it certainly has to work damn hard, but this treatment has not (yet) killed it despite it being on 302k miles now.
Worth considering that a fair few Volvo trucks don't like being switched off too soon after a run, many have suffered turbo failure after my employers introduced a telemetary style driving monitoring program which encourages us all to switch off asap.
Many drivers don't leave them at all & shut down immediately, strikes me, what the company may save in fuel, its losing in downtime getting turbo's fixed!
Prior to this monitoring, I would leave the truck a good 2 - 4 minutes at idle before shut down.
Turbo porn!
(I get penalised if I let it idle for longer believe it or not!)
Given that sometimes, in certain situations, you can see the thing glowing under the cab (at night) it certainly has to work damn hard, but this treatment has not (yet) killed it despite it being on 302k miles now.
Worth considering that a fair few Volvo trucks don't like being switched off too soon after a run, many have suffered turbo failure after my employers introduced a telemetary style driving monitoring program which encourages us all to switch off asap.
Many drivers don't leave them at all & shut down immediately, strikes me, what the company may save in fuel, its losing in downtime getting turbo's fixed!
Prior to this monitoring, I would leave the truck a good 2 - 4 minutes at idle before shut down.
Turbo porn!
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The turbo temperatures in a modern diesel are so low that just driving sensibly (not specifically off boost as this is very difficult and just no needed) for the last 2 minutes of your journey is more than sufficient.
You'll gain more by making sure you stick to the recommended service intervals with the correct oil.
You'll gain more by making sure you stick to the recommended service intervals with the correct oil.
a guy i know maintains massive diesel trains. he was saying they had an ecu update which meant when they went through low speed areas engines would just shut down with the aim being to reduce fuel comsumption.
the result was dead turbos and some dead turbos even killing engines
the result was dead turbos and some dead turbos even killing engines
I usually take it easy over the last 2-3 miles of my journey. However Borgwarner, the company that makes the K03/K03s (I think its the 'S' version in the MK5 Golf GTi (AXX)) suggest these precautions when using their turbo:
http://www.turbos.bwauto.com/products/turbochargerRecommendations.aspx
Notice no mention of allowing it to cool after working it!
http://www.turbos.bwauto.com/products/turbochargerRecommendations.aspx
Notice no mention of allowing it to cool after working it!
No offence but if that was true then HKS/Blitz/etc wouldn't sell after market turbo timers would they?
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No offence but if that was true then HKS/Blitz/etc wouldn't sell after market turbo timers would they?
Lots of companies make things that there is no need for - perceived need sells products, not actual need.
Many people buy what they don't need and don't buy what they need. Perception is what shapes this.
No offence but if that was true then HKS/Blitz/etc wouldn't sell after market turbo timers would they?
You can say that about pretty much every after market car part. None of them are needed. Some people believe they need them so they buy them.
Some people do in fact 'need' them. However a diesel bmw 4 banger does not.
Some people do in fact 'need' them. However a diesel bmw 4 banger does not.
The problem is that the basic principals of a turbocharger don't really change, be it bolted onto a BMW 4 pot diesel or a 1200BHP Supra
The basic principal may be the same, but there is quite a difference between a 'regular' four pot diesel turbo, and a 1200bhp supra, suspect the speeds and pressures are significantly higher!
Someone I know used to have a heavily modded evo, and that had a spin down feature as described above, where it would idle for a few mins when the car was switched off and locked - for cars like that they well be needed, but these are hardy regular commuter type cars!
I also would drive the last couple of miles off boost and let the car idle a few minutes before switching the engine off (enough time for me to close and lock the driveway gate, take my crap out of the car etc.)
With regards to general component longevity, I think it's more important to allow the engine/turbo/oil to warm up sufficiently, before driving the car hard.
With regards to general component longevity, I think it's more important to allow the engine/turbo/oil to warm up sufficiently, before driving the car hard.
No but the heat produced does.
The EGT of diesel engines is a lot lower than petrol engines.
No offence but if that was true then HKS/Blitz/etc wouldn't sell after market turbo timers would they?
Haha.
No offence but one word makes your comment invalid..
Turbozet
I end up sitting idle for a minute or two before turning the engine off. Can't drive "off boost" as the turbo engages at 2500 rpm. I'd be making slow progress if I changed gear lower, say at 2000 rpm.
From cold, a nice touch with the Mazda is that it limits your revs until warmed up (I guess similar to Honda's and VTEC range). So there's no chance of hooning around from cold. Not had a turbo car previously, not sure if that is standard for all other turbo cars, but I thought it was a good feature to have.
From cold, a nice touch with the Mazda is that it limits your revs until warmed up (I guess similar to Honda's and VTEC range). So there's no chance of hooning around from cold. Not had a turbo car previously, not sure if that is standard for all other turbo cars, but I thought it was a good feature to have.