Do the Garrett GT30 turbos require a cool down?
Originally Posted by ari
How does the water get pumped through the turbos? Simple convection or active pump?
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
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The installation looks incorrect. One line should be from the supply side (after going through cooler) the other line should be tapped into the return side (before the intercooler) or before entering the motor and after exiting the motor.
I didnt check all the sides but Im sure Todd did it correctly...
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
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Originally Posted by MARKSKI
I didnt check all the sides but Im sure Todd did it correctly...
Your pics may be misleading. You have two lines shown. The only way they could be correct is if each of those two lines (from the same side) are going to two different turbo's. If those two lines shown are going to the same turbo they are connected wrong ............. Todd or no Todd.
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Originally Posted by cjv
Markski,
Your pics may be misleading. You have two lines shown. The only way they could be correct is if each of those two lines (from the same side) are going to two different turbo's. If those two lines shown are going to the same turbo they are connected wrong ............. Todd or no Todd.
Your pics may be misleading. You have two lines shown. The only way they could be correct is if each of those two lines (from the same side) are going to two different turbo's. If those two lines shown are going to the same turbo they are connected wrong ............. Todd or no Todd.
According to Garrett :
http://www.honeywell.com/sites/ts/tt...3115256106.htm
Q. What water flow rates are acceptable for turbo operation?
A. Water-cooling of turbocharger bearing housings has been widely used to enhance bearing durability. It is designed to remove heat from the center housing after the engine is shut down. This is accomplished because a thermal siphon is set up in the center housing. As heat from the turbine housing and exhaust manifold soaks into the center housing, the water is vaporized and rises, drawing in cooler water. This continues until there is insufficient heat to cause the process to continue.
Installation
In order for the water-cooling to function properly, the center housing needs to be installed below the water level in the engine. The water inlet to the turbocharger needs to come from a lower point in the cooling system up to the center housing. The water outlet needs to go from the turbocharger up to a higher point in the system and cannot have any high spots or "traps" in the line.
The center housing has four water fitting locations. Two of these should be selected such that they are on opposite sides of the housing and the water inlet is lower than the water outlet. The other two locations should be sealed off. These items help ensure that the water-cooling will function properly and the necessary thermal siphoning will take place. Please note the inlet and outlet connections for the water hoses on the drawings provided. If the turbocharger were installed without the water lines being connected, the unit will operate at temperatures similar to, or slightly higher than, the current non-water-cooled unit. However, the water-cooled center housings could be run on engine tests without the water lines connected with no adverse effects, provided the engine is cooled down adequately prior to shut down.
Flow Requirements
There are no set flow requirements for the cooling water, since the majority of cooling in the center housing is done by the lubricating oil while the engine is operating. The most important water-cooling takes place after engine shutdown, at which time the flow of water is a function of the thermal siphon and the flow rate is low. Therefore, the water lines to and from the turbocharger can be sized conveniently. The flow restriction through the center housing is negligible and so would not be of concern for the cooling system capacity.
A. Water-cooling of turbocharger bearing housings has been widely used to enhance bearing durability. It is designed to remove heat from the center housing after the engine is shut down. This is accomplished because a thermal siphon is set up in the center housing. As heat from the turbine housing and exhaust manifold soaks into the center housing, the water is vaporized and rises, drawing in cooler water. This continues until there is insufficient heat to cause the process to continue.
Installation
In order for the water-cooling to function properly, the center housing needs to be installed below the water level in the engine. The water inlet to the turbocharger needs to come from a lower point in the cooling system up to the center housing. The water outlet needs to go from the turbocharger up to a higher point in the system and cannot have any high spots or "traps" in the line.
The center housing has four water fitting locations. Two of these should be selected such that they are on opposite sides of the housing and the water inlet is lower than the water outlet. The other two locations should be sealed off. These items help ensure that the water-cooling will function properly and the necessary thermal siphoning will take place. Please note the inlet and outlet connections for the water hoses on the drawings provided. If the turbocharger were installed without the water lines being connected, the unit will operate at temperatures similar to, or slightly higher than, the current non-water-cooled unit. However, the water-cooled center housings could be run on engine tests without the water lines connected with no adverse effects, provided the engine is cooled down adequately prior to shut down.
Flow Requirements
There are no set flow requirements for the cooling water, since the majority of cooling in the center housing is done by the lubricating oil while the engine is operating. The most important water-cooling takes place after engine shutdown, at which time the flow of water is a function of the thermal siphon and the flow rate is low. Therefore, the water lines to and from the turbocharger can be sized conveniently. The flow restriction through the center housing is negligible and so would not be of concern for the cooling system capacity.
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Sally, that was from Honeywell which of course makes Garrett turbos. And, as mentioned above Garrett mandates water cooling for their turbos, regardless of who installs them, yes?
Last edited by Dr_jitsu; Apr 2, 2007 at 10:35 AM.
Originally Posted by cjv
Markski,
Your pics may be misleading. You have two lines shown. The only way they could be correct is if each of those two lines (from the same side) are going to two different turbo's. If those two lines shown are going to the same turbo they are connected wrong ............. Todd or no Todd.
Your pics may be misleading. You have two lines shown. The only way they could be correct is if each of those two lines (from the same side) are going to two different turbo's. If those two lines shown are going to the same turbo they are connected wrong ............. Todd or no Todd.
__________________
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
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