Do you turbo guys leave your engine running after you stop? I heard after you have put your foot down a little your meant to leave the engine running incase the turbo burns out, from not cooling properly?
about 5 seconds. its not really necessary.
there is an auxilary coolant pump that provides additional coolant circulation for a period once the engine is shut off hot.
there is an auxilary coolant pump that provides additional coolant circulation for a period once the engine is shut off hot.
I always try to let mine idle for 30 seconds or so before cutting the engine. But like Steve i try not to place too much strain on the engine for the last mile or so before i get to work.
Turbos use engine pressure to draw oil up over the bearings for lubrication. With the engine cut off they lack the necessary pressure to continue supplying oil to the bearings which is bad if you've been thrashing the engine and the turbo is still spooling down.
This used to be a common problem on alot of police cars which all ended up in the shop for repairs as they'd thrash the engine chasing crims and then when hopping out to give chase on foot, they'd switch the engine off suddendly whilst the turbo was still turning.
However, like chris said, this problem has been rectified on most new cars, with the addition of an auxilery coolant pump. I just never trust it to lubricate properly and always try to give my engine time to cool properly before killing it.
Mike.
Turbos use engine pressure to draw oil up over the bearings for lubrication. With the engine cut off they lack the necessary pressure to continue supplying oil to the bearings which is bad if you've been thrashing the engine and the turbo is still spooling down.
This used to be a common problem on alot of police cars which all ended up in the shop for repairs as they'd thrash the engine chasing crims and then when hopping out to give chase on foot, they'd switch the engine off suddendly whilst the turbo was still turning.
However, like chris said, this problem has been rectified on most new cars, with the addition of an auxilery coolant pump. I just never trust it to lubricate properly and always try to give my engine time to cool properly before killing it.
Mike.
I've read that the after-run coolant pump will not provide satisfactory protection for the turbo! It will circulate coolant around the turbo, but will do nothing for the oil - which will be sitting in the turbo bearings, merrilly cooking away, and trying to turn to carbon.
I always do a "slowing down lap" after a thrashing, of at least 3 miles at around 40mph max, then leave her idling for a couple of mins before switch off.
Poverty
Guest
I do this too, i thought the idea to allow the engine to tick over allowed oild to flow and not crystilise in the bearings ...
Always granny drive the last few miles home
Yep, your neighbors will appreciate it and unless you live right on the end of a motorway slip road you will have some 30MPH zones to keep to any way.
About 5 seconds, lol.
Only live about 3 miles from work so not much time to have any fun as it is, if I spent the last mile driving slow after using the previous 1-2 to warm up it'd just be boring
Only live about 3 miles from work so not much time to have any fun as it is, if I spent the last mile driving slow after using the previous 1-2 to warm up it'd just be boring
mailat
Guest
Use a turbo-timer that has an auto function, meaning you connect the turbo-timer to the lambda sensor and from the voltage of the lambda it calculates how much should the car stay on ( the Apexi also has an AFR option on the display if you connect it to the lambda). The only problem with this is that the car cannot be locked from the remote, only "hardware" by inserting the key in and turning it. I have the Apexi turbo-timer for almost an year now and everything works good. I am recommending it.
PS: I bought it off ebay and it was ~60 pounds.
PS: I bought it off ebay and it was ~60 pounds.
there is no way id say use a turbo timer... lots of legal and insurance issues and when your car rolls down a hill cause you cant leave it in gear you will be sorry. (if you need a turbo timer your brakes will be hot as you park exagerating this issue)
and anyway here is some examples:
journey driven at normal sedate sensible speed takes 10 mins. - no need to leave it running. Total 10 mins.
same journey thrashing it, takes 7 mins. But then you need to leave it running for 3 mins. total 10 mins. - time saved, is none.
or, same journey, driven with 'spirit' but the last couple of miles taken easy. no need to leave running. total time 8 mins.
Also cooling on the move is far more efficient and the prefered way to go about it.
just drive the last few miles easy, if you do thrash it and then park it, let it run for a bit at tickover.
the additional coolant pump isnt really going to solve the main issue of turbio issues as its oil issues that cause most turbo failures.
and anyway here is some examples:
journey driven at normal sedate sensible speed takes 10 mins. - no need to leave it running. Total 10 mins.
same journey thrashing it, takes 7 mins. But then you need to leave it running for 3 mins. total 10 mins. - time saved, is none.
or, same journey, driven with 'spirit' but the last couple of miles taken easy. no need to leave running. total time 8 mins.
Also cooling on the move is far more efficient and the prefered way to go about it.
just drive the last few miles easy, if you do thrash it and then park it, let it run for a bit at tickover.
the additional coolant pump isnt really going to solve the main issue of turbio issues as its oil issues that cause most turbo failures.
Poverty
Guest
Are there insurance problems if you do not leave your car in gear on a hill? I never do this.
No there are not any insurance issues if you do not leave your car in gear. However i would always recommend leaving a car in gear, you only need to search for stories of cars wandering off down hills on here to see why.
I believe the highway code advises this also.
Someone - probably who has worked in the auto trade will come along and state, 'we are told never to leave cars in gear', - but thats because not everyone leaves their car in gear and as a result not everyone uses the clutch or checks if the car is in gear before starting the car...
I simply think in discussions like this, 'why wouldnt you leave it in gear?'.
However there are potential insurance issues using a turbo timer as the car is running without you at the wheel or in control of the vehicle.
When u have been booting ur turbo up and u decided to park up and u drive half a mile whitout useing the turbo i would this is fine to turn the engine off after 10sec parked up as u have let the turbo cool and spool down, lil test for u drive ur car hard booting the turbo up big time then pull over and open ur bonnet and have a look at the turbo it should to glowing red or white with the heat then cool down after about 30sec this it why u have to let it cool down after booting so the oil can cool the turbo down, but i would say if u have been driving normal befor u park up only needs about 30sec if that, but if u have been driving like a mad man
then i would say about a 1min if u cant be assed waiting get a turbo timer Rab
and IMO you look like an 'idiot' driving like a loon past people, then park up and sit there for 3 mins..
the car you passed parks up and goes where they are going before you leave the car.
SO take the last few miles easy.
the car you passed parks up and goes where they are going before you leave the car.
SO take the last few miles easy.
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