Just curious what you people do, my apexi TT has an automatic mode and it usually lets the turbo cool down about 1 minute and 30 seconds or so after I finish driving. Its a water/oil cooled t25 btw.
This is just for average driving, not top speed bazooka fun happy go shopkart fujiyama 300km/h speed trials or dyno pulls or whatever.
Accord94DX
07-24-2003, 06:22 PM
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Re: How long do you usually let the turbo cool down? (Accord94DX)
usually 1min 30 sec like the default settting on my TT . but sometimes 3-4 min after a long drive on the freeway cruising at like 70-80 mph
07-24-2003, 06:44 PM
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Re: How long do you usually let the turbo cool down? (Accord94DX)
i thought the whole purpose of turbo timre was to allow turbine/compressor wheels to slow down, then you turn the car off.. i wouldn’t turn the car right off after boosting, but lets say if i boosted for some time, then drove the car for 20 minutes in vacuum, wouldn’t that be cooling down? i’d still let it sit for a minute..
but.. the way i turn the car off is based on how long ago i boosted, if boosted very recently, i’d let it sit for 2-3 minutes. if boosted a while ago and then just driving normal, about 1 minute or less.. — do i have this right?
07-24-2003, 06:52 PM
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Re: How long do you usually let the turbo cool down? (vtec.dc2)
tt is so that the oil does not cook into the bearings. even with the best oils, if you leave them uncirculated and pooled in a extreme hot center section. that kind of heat for a period of time will break down almost any oil used in cars.
not to mention the fact that the turbo will take forever to transfer that much heat to the air to be cooled down on its own.
07-24-2003, 06:58 PM
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Re: How long do you usually let the turbo cool down? (twkdCD595)
local driving- 40 sec (1-4 miles in vaccum)
hwy driving- 3-4 min (10-20 miles vac/boost)
thats how i do it.. am i just wasting gas on the idle times?
boostin GSR
07-24-2003, 07:00 PM
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Re: How long do you usually let the turbo cool down? (twkdCD595)
not disputing what you’ve said.. just trying to understand the concept.. how much does the oil temp change.. lets say comparing driving for 80 minutes with no boost vs. driving for 30 minutes with no boost.. how much difference would it make under normal driving conditoins? anyone with oil temp. gauge?
07-24-2003, 07:04 PM
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Re: How long do you usually let the turbo cool down? (BoostinGSR)
no need for a TT imo all you need is a not so hard driving period before you shut the car off.
people say its to let the oil cool or so it wont stick to the bearings, honsetly how cool do you think your motor is going to get sitting in one spot idling. not enough to matter.
and when you shut the car off the oil is going to drain into the pan thus not sticking to the bearing. Even if you did have a TT it would still do the same thing as if you had shut it off yourself.
I think TT are a waste of $100+
Thats my couple o’ pennies
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Foozball26
07-24-2003, 07:09 PM
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Re: How long do you usually let the turbo cool down? (Foozball26)
me too kinda. but i got my turbo timer for free.
i would say 40 sec to a minute for city driving is about how long i wait to turn off the car (don’t have my tt hooked up yet)
i never take it out of town. so it never see hwy driving.
when i have the tt hooked up, i will let it cool for a minute and a half all the time. i just don’t want to sit in the car that long, thats why i don’t do it now
B_1_8_hatch
07-24-2003, 07:11 PM
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Re: How long do you usually let the turbo cool down? (93hb)
With really hot summer Texas weather, I only let me car idle for like 30 secs. It doesn’t seem cold enough to let it idle for too long.
swrdply400mrelay
07-24-2003, 07:15 PM
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Re: How long do you usually let the turbo cool down? (Foozball26)
there is always a thin coat of oil on a surface even after it has all drained to the pan. that thin coat cooks easier than a circulating 4-5 quarts.
get enough burned on thin coats of oil on your bearing and you will kill the efficiency of the turbo (and cause it to be very difficult to spin without a bit of effort) with the heat and friction.
07-24-2003, 07:17 PM
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Re: How long do you usually let the turbo cool down? (twkdCD595)
yea, but what happens when the TT shuts down?
ding ding. It leaves the same traces of oil.
Foozball26
07-24-2003, 07:21 PM
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Re: How long do you usually let the turbo cool down? (Foozball26)
kinda what i was thinking, but i guess letting the car idle for a little while lets the turbo cool down some cause its not working as hard. i don’t know. i just do it
cause people tell me i have to do it or else the turbo will mess up if i just turn the car off right away.
B_1_8_hatch
07-24-2003, 07:22 PM
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Re: How long do you usually let the turbo cool down? (Foozball26)
reading this, would it be better to turn the car off according to oil temp gauge? i should have got one of thse instead..
anyone with oil temp gauge — i know the pressure drops a whole lot, but how much of temp. changes are we talking about?
07-24-2003, 07:34 PM
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Re: How long do you usually let the turbo cool down? (vtec.dc2)
I would go off of an oil temp gauge more than just letting a TT do its thing.
Thing is I highly doubt the oil will cool any significant amount to justify a TT
you think about where the oil is going through, in the pan its being cooked by exhaust gases from the downpipe, through the feed line next to the block and in the ambient temperature of the hot engine bay, through the still spinning turbo right next to the exhaust manifold.
Im sorry but there is no way oil will cool going through that mess.
Foozball26
07-24-2003, 07:48 PM
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Re: How long do you usually let the turbo cool down? (Accord94DX)
cooling turbo using TT is better than not cooling it at all..
That’s just the way I look at it..
anyone with oil temp. gauge?
hoya_10fintec
07-24-2003, 07:57 PM
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Re: How long do you usually let the turbo cool down? (Foozball26)
The turbo needs to cool off after some good hard running. The oil will bake to the bearings if the turbo is to hot that is why you let it cool at idle (the oil temp stays the same), if you stop oil flow then it just sits and cooks on the bearings.
Dublocivic
07-24-2003, 08:03 PM
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Re: How long do you usually let the turbo cool down? (Dublocivic)
i see.. in that case, oil temps stay the same, turbo won’t cool down more if it hans’t been spinning and just sitting instead of driving in vacuum.. so i guess i was thinking right in the first place.. if i’m driving in vacuum, its doensn’t matter how long i’ve been driving, but how long i’ve been out of boost..
07-24-2003, 08:06 PM
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Re: How long do you usually let the turbo cool down? (vtec.dc2)
boost makes most of your heat, if you could manage to stay out of boost you could probably pass on the turbo timer.
I cant help but drive in boost some if I have it to take advantage of.
07-24-2003, 08:13 PM
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Re: How long do you usually let the turbo cool down? (twkdCD595)
same here. love to hear it spool up
B_1_8_hatch
07-24-2003, 08:37 PM
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Re: How long do you usually let the turbo cool down? (93hb)
i usually hit vtec b4 if i kno im gonna park. i do this to cool my pistons down and have higher oil pressure to the turbo.. like lets say a block away or so.. after that.. i just usually let it sit for 30 seconds only.. and if i drove hard kinna.. or long freeway driving.. i let the fan turn on 2 times..i dont have a TT.. reason why i only do it for so long is cuz .. if your car was to circulate hot oil itself it becomes actaully worst for the turbo.. since if your in the freeway the high oil pressure will cool the turbo down alot faster then jsut idling in one spot for 3 to 5 minutes.. plus also your watercooled turbos are getting hotter since only the fan is keeping the water cool. the best way is to have a oil cooler.. like me less cool down time.. you want the coolest oil and water to get to the turbo.. and not recirculate the hot fluids back to it
and if you want proof that its a good thing .. check out all the stock turbo german cars.. even for warm up.. they dont want you to sit there for so long to warm the car up.. they prefer you warm up for a minute or so and then drive it and stay under 3k rpm. its all about oil pressure. cuz at full warm motor already only has like 25 to 30 psi of oil going through the motor.
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BillyDaKid
Host
Please excuse me as I am new to this forum.
I was wondering whether anyone could help me .
I am the proud owner of a Seat Ibiza Cupra 20V 1.8 T 2000, which I recently purchased,
This car is my first turbo and I need a bit of help.
How long is best for the turbo to cool down? 1 minute? 30 seconds? 5 minutes? Also, what is the best warm up time?
Most people tell me 1 minute cool down is enough if you have been driving hard, and if driving «sensibly» then 6 seconds is plenty long enough.
chris_200120vt
MR carbon fibre
Oct 4, 2008 2,711 1 YEADON, LEEDS
normally i let it warm up til the secondary air pump goes off 2 mins and i let it run for 2mins before turning it off
Craigxr2i
Host
What i do is when im going home at nights, i jst take it out if gear and roll home, Give the turbo a break. lol! And just the above person said just give it a few mins when you first use it!
alexbradford
Aktivní člen
Aug 29, 2008 289 0 paisley
Am I not right and saying Ibiza cupra’s dont need to left too cool down, Thats what the secondary water pump is for?. As for warming up I leave mine on the drive untill its upto temperature
turbo009
Červený blesk
Jun 15, 2008 2,596 1 Grimsby North East Lincs
If been thrashing it,the last 2 miles i let it cruise with off boost. Then by time get home,leave it 30’s then turn off!
Car always warmed it before i thrash also,temp at 90 degrees
If your more or less on boost all the time on way where your going,then arrive at you destnation,leave your car for 2 mins before turning off!
cupra.al
12. ledna 2009 5,005 1 XNUMX Východní Sussex. Místo narození výmolu.
normally i let it warm up til the secondary air pump goes off 2 mins and i let it run for 2mins before turning it off
thats what i do i also dont take it over 3000 revs untill its upto temprature.
D—R—E—W
Aktivní člen
Mar 18, 2010 194 0 West Lothian
Or do what I have and get a turbo timer
andycupra
stav se může změnit
18. srpna 2003 8,318 143 XNUMX do zítřka, prostě pokračuji dál.
loads of people think the secondary water pump is for cooling the turbo.
But what exactly is the water circulating around the engine going to do to help the turbo?
besides its the oil being cooked thats the potential issue and the subsequent bearing issues. The oil sits there on a hot turbo, and the oil is not being circulated once you turn off.
How long you need to leave it when being parked up depends on what you have been doing for last few miles / 5 mins.
If you have been driving sensibly, off boost and on local roads then cooling down isnt needed.
Straight off the motorway? giving it some beans? then a couple of mins is needed.
However, you know where you are going, so plan ahead, take the last few miles easy off boost. then cooling down isnt needed,.
How silly do you look if you boot it, overtake people, then park up and sit there cooling the turbo while the people you overtook park up and get where they are going before you. (they will be thinking ‘********’)
Warm up.. well the longer the better is the short answer. Some will say dont boot it till the engine temp reaches 90, and yes i agree with not booting it before this, HOWEVER this is not to say the oil is up to temp which takes at least twice if not 3 times as long as the engine to warm up.
Having siad this, very few people warm up correcly on any cars its not a problem just specific to turbo cars although the issue is potentially exagerated..
Ps some people also think that being on or off boost is simply a matter of the number of revs.. for example some say keep it below 3,000 revs and you are off boost,. This is NOT correct. Yes the higher the revs the harder the turbo tends to work, but how hard you press the accelerator is a major factor. You can get the revs pretty high with no boost being created if you know how to drive and dont press the accelertor hard, and also you can get the turbo spooling up below 3,000 revs if you use the accelerator heavily.
