Turbo Timer
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DWONG415 (04-22-2016)
04-22-2016, 02:43 PM
#3
Check out some wet info from Garrett here...
https://www.turbobygarrett.com/turbo...er_Cooling.pdf
Water-Cooled Turbochargers: They Need Water!
The Garrett® engineers are asked many such questions regarding our water-cooled turbochargers.
Many customers question the necessity or benefits of plumbing in those extra water lines to the sides of the turbo’s center housing. Why not just leave them off? The reality is that a water-cooled turbo can be damaged irreparably without proper water line setup. With a little background and some explanation of what water cooling really does for turbochargers, this Garrett® white paper will hopefully convince a skeptic that the benefits provided by water-cooling are worth the small effort required to properly set it up.
What does water-cooling really do?
Water-cooling improves mechanical durability and lengthens the turbocharger’s life. Many turbochargers are designed without water cooling ports and are sufficiently cooled by air and the lubricating oil that flows through them. Other turbochargers, such as many in the Garrett®
GT & GTX ball bearing lineup, are designed from the beginning to be cooled by oil and water.
How can we tell the difference between an air/oil-cooled turbo and an oil/water-cooled turbo?
If the turbocharger’s center housing has threaded ports on either side, at 90° from the oil inlet/outlet flanges, then it is water-cooled.
In order to meet durability targets defined by Garrett® engineers during its development, it needs water flowing through it.
Water cooling’s main benefit actually occurs after the engine has been shut down.
Heat stored in the turbine housing and exhaust manifold “soaks back” into the center section of the turbocharger after shutdown.
If water is not plumbed correctly, this intense heat can potentially destroy the bearing system and the oil-sealing piston ring behind the turbine wheel.
How does water-cooling work?
The physical process of turbocharger water-cooling is an interesting one, and works in a different way than what might seem obvious.
It is true that during normal engine operation water flows through the turbocharger mostly due to pressure created by the engine’s water pump. However, an additional phenomenon known as “thermal siphoning” pulls water through the turbo’s center housing if the water lines are properly routed, even after the engine is shut off and the water pump is no longer pumping.
https://www.turbobygarrett.com/turbo...er_Cooling.pdf
Water-Cooled Turbochargers: They Need Water!
The Garrett® engineers are asked many such questions regarding our water-cooled turbochargers.
Many customers question the necessity or benefits of plumbing in those extra water lines to the sides of the turbo’s center housing. Why not just leave them off? The reality is that a water-cooled turbo can be damaged irreparably without proper water line setup. With a little background and some explanation of what water cooling really does for turbochargers, this Garrett® white paper will hopefully convince a skeptic that the benefits provided by water-cooling are worth the small effort required to properly set it up.
What does water-cooling really do?
Water-cooling improves mechanical durability and lengthens the turbocharger’s life. Many turbochargers are designed without water cooling ports and are sufficiently cooled by air and the lubricating oil that flows through them. Other turbochargers, such as many in the Garrett®
GT & GTX ball bearing lineup, are designed from the beginning to be cooled by oil and water.
How can we tell the difference between an air/oil-cooled turbo and an oil/water-cooled turbo?
If the turbocharger’s center housing has threaded ports on either side, at 90° from the oil inlet/outlet flanges, then it is water-cooled.
In order to meet durability targets defined by Garrett® engineers during its development, it needs water flowing through it.
Water cooling’s main benefit actually occurs after the engine has been shut down.
Heat stored in the turbine housing and exhaust manifold “soaks back” into the center section of the turbocharger after shutdown.
If water is not plumbed correctly, this intense heat can potentially destroy the bearing system and the oil-sealing piston ring behind the turbine wheel.
How does water-cooling work?
The physical process of turbocharger water-cooling is an interesting one, and works in a different way than what might seem obvious.
It is true that during normal engine operation water flows through the turbocharger mostly due to pressure created by the engine’s water pump. However, an additional phenomenon known as “thermal siphoning” pulls water through the turbo’s center housing if the water lines are properly routed, even after the engine is shut off and the water pump is no longer pumping.
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