Manufacturer of specialized in various engine camshafts
With the release of the new generation of Porsche 911, the 911 officially entered the 992 era. Recently, the new generation of 911 high-performance version GT3 has also been exposed by the media. The new car will be officially released within the year as one of the most popular 911 models. , 911 GT3 represents the decentralization of Porsche racing technology and is also the flag model of the German manufacturer. So what upgrades are there for the new generation? Compared with the old model, how many changes are there, let's choose the car detective to analyze in detail from the aspects of power, suspension and aerodynamics.
Power comparison
Subject to strict Euro 6 emission standards, the power improvement of the new generation 911 GT3 is not particularly obvious. The 4.0L naturally aspirated horizontally opposed six-cylinder engine comes from Speedster. Through the improvement of the exhaust system, the new generation of emission standards Higher, compared to Nissan’s family car, the engine of the 911 GT3 has a very high speed, and its red line speed reaches 9000 rpm. In order to ensure stability at high speeds, Porsche uses rigid valve control instead of hydraulic flat valve control. The valve clearance can only be set with gaskets in the factory, and the rigid valve reduces friction loss. At the same time, this self-priming engine also uses variable intake and exhaust camshafts controlled by a variable pressure Engine Camshaft For Mercedes Benz system. In order to reduce the center of gravity of the engine, the 911 GT3 uses the dry sump lubrication system on the racing car, titanium connecting rods and high-rigidity crankshafts. The compression ratio of the engine can be maintained at 13.3:1.
Through a series of adjustments, the maximum power of the engine reached 510 horsepower, an increase of 10 horsepower compared to the previous generation. In addition to increasing power, Porsche also reduced the weight of the 911 GT3, removed the rear seat, reduced sound insulation, replaced it with a thinner windshield, and used a lightweight carbon fiber hood, although the new generation 911 standard version is more advanced than the previous generation. It is heavy, but the 911 GT3 version has not changed from the previous generation, so the push-to-weight ratio is higher.
Hanging comparison
The biggest change in the new generation of 911 GT3 is the front suspension design. The 911 classic McPherson front suspension is officially changed to a double wishbone design. Since McPherson does not have an upper control arm, whether it is the dynamic adjustment of the vehicle or the roll when cornering There is a clear gap between the support and the double wishbone with fork-shaped control arms. However, because the 911 is a unique rear-engined model, the front trunk becomes the only place to store luggage, and MacPherson takes up more space. Small, so McPherson appeared on the Porsche 911 since the first generation of models in the 60s.
In 2017, Porsche is developing a 911 RSR race car The double-wishbone suspension was introduced for the first time. This technology is also used on the new generation of 911 GT3. Although it affects the loading capacity of the front trunk, this design is obviously more reasonable for the 911 GT3 version that focuses on driving on the track. . In addition to the changes in the suspension structure, the stiffness of the spring is increased by 25-30% compared to the old model, the load on the center of gravity is more obvious when cornering, and the cornering speed has also been significantly improved. Compared with the front axle, which has changed a lot, the rear axle of the 911 GT3 remains unchanged. It still adopts a multi-link design with rear wheel steering. When the speed is lower than 50km/h, the front and rear wheels turn in opposite directions, making it more flexible when turning; When the vehicle speed exceeds 80km/h, the front and rear surrounding wheels turn to the same direction, which increases the stability of high-speed handling.
Comparison of aerodynamics
In addition to the changes in power and suspension, the new generation of 911 GT3 in aerodynamics The design uses more racing technology. First, the rear wing bracket is changed to a swan-neck design, that is, the mounting point of the rear wing is changed from below the wing surface to the upper side. The lower wing surface can have fast and uninterrupted airflow, and the higher The flow rate and the'cleaner' airflow help increase the air downforce.
In the front bumper position, 911 GT3 A new splitter is added, and the frontal airflow is quickly split, part of it enters the bottom of the car, and some enters the radiator at the front of the car. Because there is no obstruction under the car, the flow rate is faster. A large-size diffuser is also installed in the rear of the GT3. , To further increase the flow rate of the airflow under the vehicle. Everyone knows that where the flow rate is high, the pressure is small. The downforce is created by the difference in the flow rate of the airflow. Through these changes, the air downforce of the new generation GT3 is increased by 50% compared with the old model. It is more stable when driving at high speeds.
Car selection detective point of view: In addition to power, suspension and aerodynamic upgrades, the new generation of models also uses a wider Tires and larger brake discs. The diameter of the front carbon ceramic brake disc reaches 408mm, which is 28mm more than the old model. Therefore, the new generation 911 GT3 has been greatly improved in terms of acceleration performance and cornering performance. The new generation 911 GT3 is a better choice while remaining unchanged.
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