1.10 Oil supply

Compared with the current 911 Carrera models, the new 911 GT3 features classic dry-sump lubrication with a separate engine oil tank. This system ensures a reliable oil supply for street and race circuit use.

Red - Pressure side Orange - Intake side

01_12_14

Dry-sump lubrication

To allow dry-sump lubrication based on the new generation of engines (991), the oil pan had to be completely redeveloped. The basis for this is the oil supply system used in the current 911 Carrera models with four oil extraction pumps for the cylinder heads, an additional oil extraction pump in the oil pan and an oil pressure pump. There are also two additional oil extraction points in the oil pan at the front and rear so that the oil can be pumped out reliably into the separate oil tank even during heavy acceleration and intensive braking phases. Engine 1

Engine 1

The new 911 GT3 also has an oil windage tray. This system originates from motor racing and has been introduced as a new component. The oil windage tray consists of a cover between the crankcase and oil pan with 18 individual openings (3 per cylinder) with sickle-shaped blades. This system separates (“scrapes off”) the spray oil, which is set in rotary motion by the crankshaft, at the sickle-shaped blades and lets it drain back into the oil pan, particularly at high engine speeds. As a result, there is less spray oil in the crankcase and the engine’s so-called “churning losses” are reduced.

The oil-water heat exchanger and the oil filter are also located on the new oil pan. Compared with the 911 Carrera engines where the oil-water heat exchanger and oil filter are mounted above the engine block, their low position serves to further lower the center of gravity of both the engine and the vehicle.

Oil tank, oil windage tray, oil pump

01_13_14

Engine oil tank

The separate engine oil tank was also newly developed. By changing it to a funnelshaped design, it was possible to reduce the oil fill volume of the new tank from 7.9 qts (7.5 l) (997 GT3 II) to 6.3 qts (6.0 l) compared with the previous model. This reduces the vehicle weight by approximately 2.9 lbs (1.3 kg).

In order to reduce the drive losses of auxiliary units as well as churning losses, the new 911 GT3 is equipped with an electronic demand-controlled oil pump. With this oil pump, the delivery pressure and volume are controlled for the entire engine map. It also ensures demand-controlled lubrication and minimizes the energy consumption of the oil pump.

1 - Variable pressure pump 2 - Suction pump (4 x) 3 - Control valve

In addition to the demand-controlled oil pump, the new 911 GT3 is fitted with not just one (911 Carrera) but two piston oil spray nozzles, which are opened together, depending on the temperature, load and engine speed. This allows more intensive cooling of the pistons, which are subjected to high thermal loads.

01_14_14 Engine 1

Oil spray nozzles 01_15_14