2013 911 GT3 PDK Hits The Ring!
#91
I find this short article from HowStuffWorks as very useful for further conversation
Most production cars have a wet sump oil system. The HowStuffWorks article on car engines shows you where the sump is -- it's the area below the crank shaft. In a wet sump, the oil that you put into the engine is stored beneath the crankshaft in the oil pan. This pan has to be large and deep enough to hold four to six quarts of oil -- think about two 3-liter bottles of soda and you can see that this storage area is pretty big.
In a wet sump, the oil pump sucks oil from the bottom of the oil pan through a tube, and then pumps it to the rest of the engine.
In a dry sump, extra oil is stored in a tank outside the engine rather than in the oil pan. There are at least two oil pumps in a dry sump -- one pulls oil from the sump and sends it to the tank, and the other takes oil from the tank and sends it to lubricate the engine. The minimum amount of oil possible remains in the engine.
Dry sump systems have several important advantages over wet sumps:
Because a dry sump does not need to have an oil pan big enough to hold the oil under the engine, the main mass of the engine can be placed lower in the vehicle. This helps lower the center of gravity and can also help aerodynamics
The oil capacity of a dry sump can be as big as you want. The tank holding the oil can be placed anywhere on the vehicle.
In a wet sump, turning, braking and acceleration can cause the oil to pool on* one side of the engine. This sloshing can dip the crankshaft into the oil as it turns or uncover the pump's pick-up tube.
Excess oil around the crankshaft in a wet sump can get on the shaft and cut horsepower. Some people claim improvements of as much as 15 horsepower by switching to a dry sump.
(by allowing a lower hoodline).
The disadvantage of the dry sump is the increased weight, complexity and cost from the extra pump and the tank -- but that's a small price to pay for such big benefits!
In a wet sump, the oil pump sucks oil from the bottom of the oil pan through a tube, and then pumps it to the rest of the engine.
In a dry sump, extra oil is stored in a tank outside the engine rather than in the oil pan. There are at least two oil pumps in a dry sump -- one pulls oil from the sump and sends it to the tank, and the other takes oil from the tank and sends it to lubricate the engine. The minimum amount of oil possible remains in the engine.
Dry sump systems have several important advantages over wet sumps:
Because a dry sump does not need to have an oil pan big enough to hold the oil under the engine, the main mass of the engine can be placed lower in the vehicle. This helps lower the center of gravity and can also help aerodynamics
The oil capacity of a dry sump can be as big as you want. The tank holding the oil can be placed anywhere on the vehicle.
In a wet sump, turning, braking and acceleration can cause the oil to pool on* one side of the engine. This sloshing can dip the crankshaft into the oil as it turns or uncover the pump's pick-up tube.
Excess oil around the crankshaft in a wet sump can get on the shaft and cut horsepower. Some people claim improvements of as much as 15 horsepower by switching to a dry sump.
(by allowing a lower hoodline).
The disadvantage of the dry sump is the increased weight, complexity and cost from the extra pump and the tank -- but that's a small price to pay for such big benefits!
#92
I tried to find more info about Porsche's "integrated dry sump" on the 9A1. Basically it's a wet sump engine with the pan in the engine. It should be called "integrated wet sump" IMHO. I'm sure though for the GT3 they will find a way to make it a proper dry sump, because isn't dry sump required for ALMS anyway?
#93
This has nothing to do with the tires you guys were talking about that made you think the car was dry sump
#94
Does anybody think it's possible the GT3 could have a different engine than the 9A1?
I remember Porsche said they're stopping the Mezger because it makes no sense to build two completely different engines side by side (9A1/Mezger). Key word, "completely". Is it possible they could build a different engine than the 9A1 that happens to share a lot of parts?
I remember Porsche said they're stopping the Mezger because it makes no sense to build two completely different engines side by side (9A1/Mezger). Key word, "completely". Is it possible they could build a different engine than the 9A1 that happens to share a lot of parts?
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