Porsche's most powerful naturally aspirated engine at 520 hp
The four-litre, six-cylinder naturally aspirated engine from Porsche used in the new 911 GT3 RS pushes the sports car to new limits. The flat engine delivers 15 kW (20 hp) more than the engine in the previous model and in the current 911 GT3. Torque has been increased by 10 Nm to 470 Nm. The maximum power is achieved at 8,250 rpm, and maximum torque at 6,000 rpm. Together with its speed range of up to 9,000 rpm, the six-cylinder engine was the ideal choice as a thoroughbred sports engine.
Used in conjunction with the standard seven-speed Porsche Doppelkupplung (PDK), the new 911 GT3 RS accelerates from zero to 100 km/h in just 3.2 seconds. The top speed is 312 km/h. In addition to technologies that have been tried and tested in the 911, such as VarioCam, direct fuel injection and the variable resonance intake manifold, it is primarily solutions taken from the world of motor racing that make the engine of the 911 GT3 RS so robust and so stable at high speeds. A crankshaft with larger bearing diameters, wider connecting rod bearings, plasma-coated cylinder liners to reduce friction losses and wear and a significantly improved oil supply all contribute to the increase in load capacity and speed stability.
Fixed valve train enables speeds of up to 9,000 rpm
The switch to a fixed valve train with an adapted valve spring design ensures that the maximum engine speed of 9,000 rpm is fully available even when the engine is pushed to its limits. With this type of gas exchange control system, the valves of the engine are actuated via rocker arms without hydraulic valve clearance compensation. The valve clearance is adjusted just once during production of the engine, using shims, and is designed to last for the entire life of the engine.
The oil supply of the engine is also based on motorsport principles: In addition to revving at very high speeds, the engine is also subjected to particularly strong lateral and longitudinal accelerations while driving on the race track. The dry-sump lubrication uses a total of seven suction stages, which quickly and efficiently return the engine oil to the external oil tank. The oil pump ensures the optimum oil pressure for every operating condition. Another new feature is the particularly efficient oil supply to the connecting rod bearings, which are placed under significant load. These are supplied with oil via a central oil supply into the crankshaft directly from the oil pump. The defoaming of the oil before it is fed to the separate oil tank via a centrifuge is also a completely unique feature in this vehicle class and originates from high-performance motorsport.
911 Turbo body promotes ram air effect
Using the 911 Turbo body for the 911 GT3 RS also brings benefits in terms of the engine: The more process air enters the combustion chambers, and the more compressed the process air is, the more powerful the engine becomes. The air intakes in the rear fenders, taken from the 911 Turbo, also make a contribution here. At higher speeds, the intakes generate a ram air effect, which increases the flow rate and enhances performance.
As standard, the 911 GT3 RS features a sports exhaust system with rear silencer and two central tailpipes made from titanium. The large volume of the exhaust system reduces the exhaust gas pressure and thus increases performance.