For you STi owners...any reviews after breakin??
So is it really true that water cooled turbos don't need a turbo timer for extended life?
Just another thought.....if you have some Clifford alarms they have a turbo timer function built in. You dont get to have a cool looking device mounted anywhere but it is convenient.
Just another thought.....if you have some Clifford alarms they have a turbo timer function built in. You dont get to have a cool looking device mounted anywhere but it is convenient.
Angry Dan
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Joined: Nov 2002
Posts: 7,183
From: www.turboculture.com
Car Info: 05 Evo VIII
Originally posted by kawshon1
so if you guys beat on your cars till the turbo is glowing, are you still gonna turn it off when your stopped?
so if you guys beat on your cars till the turbo is glowing, are you still gonna turn it off when your stopped?
Guest
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Watch your coolant overflow tank on any vehicle when you turn the car off. The coolant heats up, expands and pushes itself out into the overflow tank for about 15 minutes after the engine is off. This is not a small amount of fluid, which is why the 'full' line on your coolant overflow tank is half-way up the bottle. This is the coolant that will be flowing through your 'glowing' turbo once the motor is off. The 'glowing' turbo will also increase the coolant's heating/expansion/flow out into the overflow tank. I don't think that your little turbo will still be hot enough to damage itself once this thermodynamic transfer ends...actually, by definition, this flow will continue until it's all the same temp...leaving your motor and turbo happy and cool.
Registered User
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Joined: Jan 2003
Posts: 1,224
From: Honolulu, HI
Car Info: 1991 Toyota MR-2 Turbo
I respectfully disagree with 955 Daytona. Here's why.
The main concern is coking of the oil in and around the turbo. The elevated temperatures can/will break down the oil, turning it into a sludge. Even if the coolant is still being drawn through the turbo after shut down, there is no oil flow. The circulating (not a whole lot of flow) coolant will cool down some of the oil in the vicinity of the coolant channels but there is still oil in other parts of the turbo and supply lines which may never see the benefit of the coolant. Relative to the oil, the thermal mass of the hot turbo is huge and most of the heat picked up from the coolant will be from the turbo and not the oil sitting in the supply line.
A turbo timer is safe, cheap insurance. Any car (turbo or N/A) should not be shut down immediately after being run hard.
The main concern is coking of the oil in and around the turbo. The elevated temperatures can/will break down the oil, turning it into a sludge. Even if the coolant is still being drawn through the turbo after shut down, there is no oil flow. The circulating (not a whole lot of flow) coolant will cool down some of the oil in the vicinity of the coolant channels but there is still oil in other parts of the turbo and supply lines which may never see the benefit of the coolant. Relative to the oil, the thermal mass of the hot turbo is huge and most of the heat picked up from the coolant will be from the turbo and not the oil sitting in the supply line.
A turbo timer is safe, cheap insurance. Any car (turbo or N/A) should not be shut down immediately after being run hard.
Guest
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Since the STi uses a new IHI turbo, I don't think anyone but Subie engineers right now knows exactly the relative locations of the oil/coolant channels. Maybe they figured out to run the supply line past a nice cool spot w/ plenty of coolant channel around it...wishful thinking maybe...also, a good high-quality synthetic really won't suffer from 'coking' like a conventional oil...better living through chemistry!
As for me, when I flog either my Triumph or my soon-to-be STi, I will be sure to drive it a bit in a somewhat sane fashion before I shut it down and go to bed.
As for me, when I flog either my Triumph or my soon-to-be STi, I will be sure to drive it a bit in a somewhat sane fashion before I shut it down and go to bed.