I have read through some old posts with differing opinions about this. How many of you wait a few minutes after driving (at idle) to cool down the turbos?
thanks
I have read through some old posts with differing opinions about this. How many of you wait a few minutes after driving (at idle) to cool down the turbos?
thanks
Jonathan
66 912 Black/Red
missed:
03 RS6 Avus Silver/Black
08 RS4 Daytona Grey/Black
97 C2S Guards Red/Black
98 C2S Arctic Silver/Black
04 E46 M3 Silver Grey/Black
All depends on the driving methods prior. Running full tilt on the track - for certain. And I do it even after a cool down lap. Driving home in rush hour traffic - never. High RPM for the turbo equates to increased heat. If you perform a full boost run coming up the street to your house, then you would run it for a half minute to dissipate some of that new energy. I highly doubt you do this so generally speaking most people would find they can simply turn off ignition when they arrive at their final destination.
'02 S6 Avant Silver - Pokey | Carbon Black/Ebony RS6 w/ stuff - darn quick | '03 Daytona Grey/Ebony RS6 w/ more stuff - quicker yet | '91 NSX CDN issue with 6spd & BBSC - quicker yet and then some | '87 Buick GNX OEM clone w/ lots of stuff - quickest hands down
I think the manual or some Audi material recommends allowing the turbos to come to a complete stop prior to engine shutdown. So idling 30 sec to a minute should do. Shutting down after full throttle could cause turbo failure if they're still spinning when the oil flow stops.
Last edited by snoopra; October 18th, 2008 at 08:07. Reason: Add text
2003 RS 6______________________________________________
Mugello Blue/Silver Interior/Wood Trim/Warm Weather Package/
LED Tail lights/RNS-E/DVD Video/OEM S5 19's/Custom Painted Calipers/Full CAT-Less, Nonresonated Milltek/APR DV's/
H-Sport Sway Bars/5 Bar FPR/ABT Aluminum pedals/MTM TCU Chip
-------Other Rides
2007 Cadillac Escalade
2007 Jeep Compass
2006 Jeep Commander
2006 Chevy Colorado Reg Cab
-------
ya, exactly@tim. it all depends on what you were doing right before.
I just generally drive for a few minutes off boost before shut down, that will do the same thing.
So fast, it will re-arrange yer trousers!!
An R8 and an RS6 in one garage: It doesn't get much better!
Good feedback. Of course I never come roaring home at full throttle... but I do sometimes pull into a shopping center, parking lot, whatever, after spirited driving. I probably need to just keep doing what I am doing...which is giving the car about 60 seconds before shut down...every single time to be safe. Thanks all
Jonathan
66 912 Black/Red
missed:
03 RS6 Avus Silver/Black
08 RS4 Daytona Grey/Black
97 C2S Guards Red/Black
98 C2S Arctic Silver/Black
04 E46 M3 Silver Grey/Black
Doesn't the car have an after shut down pump that circulates oil through the turbo's bearings until they get to a certain temp? Seems I was told this or read this long ago. You can hear some sort of electrical motor working after you shut the car down if you listen carefully and the (cooling) fan's not running.
An R8 and an RS6 in one garage: It doesn't get much better!
I usually wait until the electric fans stop before I switch her off... and yes, there is an after-run turbo cooling recirc pump that runs on for a few mins after shutdown.
The after-run pump only circulates water, not oil.
2003 RS 6______________________________________________
Mugello Blue/Silver Interior/Wood Trim/Warm Weather Package/
LED Tail lights/RNS-E/DVD Video/OEM S5 19's/Custom Painted Calipers/Full CAT-Less, Nonresonated Milltek/APR DV's/
H-Sport Sway Bars/5 Bar FPR/ABT Aluminum pedals/MTM TCU Chip
-------Other Rides
2007 Cadillac Escalade
2007 Jeep Compass
2006 Jeep Commander
2006 Chevy Colorado Reg Cab
-------
Important to the life of your turbos is to avoid bringing on boost until the oil has warmed up - say to about 175-200 degh f.
GBNF: Mugello, silver, carbon, RNS-E, H&R coilovers, Hotchkiss
'14 GL550
'79 911SC Targa
Exactly.
Since I don't (usually ) drive up my driveway at peak boost, the turbo's have been quiet for a minute before I come to a stop, so then it's not much of an issue (with my Porsche 993 and 996 typ 911TT's). My Audi though is currently just a NA RS4 ( ), although just about set for an MTM supercharger conversion next month.
couple of points:
1) the afterrun pump is designed to circulate coolant thorough the turbo housing every time the car is turned off. this is designed to avoid heat soak
2) the oil in the turbo bearings is really only any use when then the turbo is spinning in those bearings. when you turn off so does the turbo. heat soak can cook the oil and coat the bearing surfaces with residue causing additonal stress and eventual failure. hence the afterrun pump.
i only ever allow cool down after a hard run, never around town or for normal motorway runs.
dave
'03 rs6
'04 allroad tdi
i always let the turbos cool down after going hard. the best thing is to drive a few minutes at normal speed after you have used full throttle. this is alot better than letting it idle at stand since the engine will have much more (and thus better) airflow while driving at normal speeds. this is the safest way to make sure that your turbos will last long.
Good....bad.....hey i am the guy with the RS6!
ya, when you're moving, there will be more cool airflow, when your car is idling in the garage, it's just sucking in the hot air that it's venting.
it's probably worth asking how many have had a turbo failure? modern oils and water circulation seem to have taken premature turbo failure away....
dave
'03 rs6
'04 allroad tdi
i had a failure with the old C5 RS6 at 110k km...had to get both replaced.
Good....bad.....hey i am the guy with the RS6!