Turbo Timer - Page 2

BHODGES3 · 05-29-2003, 01:28 PM

Quote:

Originally Posted by ingraham

Well I must say BHodges your new avitar is you best so far, and most annoying

Muhahah! You think this one is bad....wait until I spread my evil avatars to all. I got one for ya right now as a matter of fact....

CloNeGTS · 05-29-2003, 06:45 PM

Uh....before this gets out of hand.....I think you should change the one you have up now. That certainly isn't what I'd call a 'safe at work' image. Can ya do that for us? Thanks.

BHODGES3 · 05-30-2003, 07:10 AM

Heh, sure...

cann · 06-15-2003, 06:22 PM

why not just step and let go quicklyof the gas at 3k rpm and stop the car before let go, so the oil goes away at the split second

RDiamond · 06-15-2003, 07:12 PM

From the STi service manual (same as the WRX):

B: TURBOCHARGER UNIT
The turbocharger is water-cooled. It utilizes a wastegate valve to adjust its supercharging pressure to an optimum level. ...

C: LUBRICATION OF TURBOCHARGER
The turbocharger is lubricated by engine oil branched out from the oil pump. To cope with very high speed of the turbocharger turbine and the compressor shaft which may reach a maximum of several hundred thousands of rpm, full-floating type bearings are used which can form adequate oil films on their inside and outside during running. Further the oil supplied to the turbocharger also plays a role of cooling the turbine so that heat from exhaust gas does not transmitted to the bearings.

D: COOLING OF TURBOCHARGER
The turbocharger unit is cooled by engine coolant, which enhances the reliability and durability of the unit. The engine coolant from the coolant drain hose located under the cylinder head is led by a pipe to the coolant passage provided in the turbocharger bearing housing. After cooling the bearing housing, the engine coolant is led into the coolant filler tank through a pipe.

gasguzzler259 · 06-15-2003, 08:40 PM

Use a full synthetic oil such as Mobil 1. This will prevent any possibility of coking which the turbo timer is used to prevent. Coking is where the oil breaks down from heat and is no longer oil. Full synthetics, not blends, have a much higher heat tolerance than regular organic based oil. Buick Grand Nationals which did not have water cooling never had any problems using such oils.

RDiamond · 06-16-2003, 11:03 AM

Some more insight from Mike Shields (a long-time Subie tuner):
The Subaru WRX engines have their water catch tank high on the engine above the turbocharger. When the engine is shut off the water continues to circulate via a physical property of water called a thermal siphon. Simply put, hot water rises up to the catch tank, being drawn from the relatively cool cylinder head water jacket up through the turbo housing. One still needs to take a cool down lap at the track and perhaps should not stop at the top of a mountain pass to enjoy the view if you have been on the boost all the way up, but for the other 99% of the time there is no need to let the engine idle for a minute before shutting off ignition. Even when the engine is off, the cooling water will circulate past the turbine bearing housing.
http://www.spdusa.com/engine_modification.htm

05-29-2003, 06:45 PM	#17
CloNeGTS S204 Racer Car: Solo II, WRC Location: Overland Park, KS Posts: 2,776 Join Date: Oct 2002 Trader Rating: (1)	Grab my spot in Colorado Uh....before this gets out of hand.....I think you should change the one you have up now. That certainly isn't what I'd call a 'safe at work' image. Can ya do that for us? Thanks.

06-15-2003, 07:12 PM	#20
RDiamond STI Driver Location: Northern Virginia Posts: 251 Join Date: May 2003 Trader Rating: (0)	Evo 8 Message Boards? From the STi service manual (same as the WRX): B: TURBOCHARGER UNIT The turbocharger is water-cooled. It utilizes a wastegate valve to adjust its supercharging pressure to an optimum level. ... C: LUBRICATION OF TURBOCHARGER The turbocharger is lubricated by engine oil branched out from the oil pump. To cope with very high speed of the turbocharger turbine and the compressor shaft which may reach a maximum of several hundred thousands of rpm, full-floating type bearings are used which can form adequate oil films on their inside and outside during running. Further the oil supplied to the turbocharger also plays a role of cooling the turbine so that heat from exhaust gas does not transmitted to the bearings. D: COOLING OF TURBOCHARGER The turbocharger unit is cooled by engine coolant, which enhances the reliability and durability of the unit. The engine coolant from the coolant drain hose located under the cylinder head is led by a pipe to the coolant passage provided in the turbocharger bearing housing. After cooling the bearing housing, the engine coolant is led into the coolant filler tank through a pipe.

06-16-2003, 11:03 AM	#22
RDiamond STI Driver Location: Northern Virginia Posts: 251 Join Date: May 2003 Trader Rating: (0)	Some more insight from Mike Shields (a long-time Subie tuner): The Subaru WRX engines have their water catch tank high on the engine above the turbocharger. When the engine is shut off the water continues to circulate via a physical property of water called a thermal siphon. Simply put, hot water rises up to the catch tank, being drawn from the relatively cool cylinder head water jacket up through the turbo housing. One still needs to take a cool down lap at the track and perhaps should not stop at the top of a mountain pass to enjoy the view if you have been on the boost all the way up, but for the other 99% of the time there is no need to let the engine idle for a minute before shutting off ignition. Even when the engine is off, the cooling water will circulate past the turbine bearing housing. http://www.spdusa.com/engine_modification.htm This ad is not endorsed by this member. Please register or login to hide this ad.

05-30-2003, 07:10 AM	#18
BHODGES3 Professional STI Driver Fav Mod: Computer Programmer Posts: 438 Join Date: Jan 2003 Trader Rating: (0)	Heh, sure...

06-15-2003, 06:22 PM	#19
cann Junior STI Driver Posts: 112 Join Date: Jun 2003 Trader Rating: (0)	why not just step and let go quicklyof the gas at 3k rpm and stop the car before let go, so the oil goes away at the split second

06-15-2003, 08:40 PM	#21
gasguzzler259 Lurker Posts: 4 Join Date: Jun 2003 Trader Rating: (0)	Use a full synthetic oil such as Mobil 1. This will prevent any possibility of coking which the turbo timer is used to prevent. Coking is where the oil breaks down from heat and is no longer oil. Full synthetics, not blends, have a much higher heat tolerance than regular organic based oil. Buick Grand Nationals which did not have water cooling never had any problems using such oils.