憑良心說保時捷911車系的改變比較像小改款，這次的991和997除了尾燈和耳朵好像差異不大，連引擎和pdk也一樣，對於本身有997tt的人，換991tt的意義大嗎？另外請教所有porsche的pdk都是同一具還是像同集團的福斯奧迪的dsg有分等級呢？
以下轉自rennteam2.0網站.
http://www.rennteam.com/forum/page1.html?vs=3#post9
4% less performance/weight ratio (2,87 kg/hp vs. 2,99 kg/hp)
123 kg more downforce at 300 kph in Performance Mode (9 kg in Speed mode, same as 997 Turbo S)
28 mm wider in the rear than 997 Turbo S
200 rpm higher rev limiter (7200 rpm instead of 7000 rpm)
Completely newly developed exhaust manifold, conrods, pistons and adjusted VTG chargers.
Middle cooler in the front is a new development with a higher cooling capacity. The cooling fans have an improved power of 400 W (vs. 280 W in the 997)
Turbo S Airblades improve cooling to the side coolers, they are also standard on the regular Turbo in regions with very hot climate.
Intercoolers similar to 997 models but due to the new side vents and air outlets in the lower rear bumper, air flow has been substantially improved.
Optional round sport pipes for the exhaust system are made of titanium and are polished.
991 Turbo S sounds sportier at idle than 991 Turbo (different sound symposer programming, VTG blade "opens", later ignition timing), in Sport and Sport Plus mode, the idle rpm figure is raised from 680 to 800 rpm (both Turbo S and Turbo)
Sound symposer does not create artificial sound, it transmits the "natural" sound of the engine from the engine bay into the interior. Unlike in the Carrera models (2 chamber sound symposer), the Turbo/S sound symposer has 4 chambers.
PDK has been improved substantially, incl. an integrated rear axle differential lock and a thermodynamic integration into the cooling system of the car. Especially the automatic function of the PDK has been highly improved but also shifting speed and comfort.
Electrohydraulic operated PTM clutch for front axle allows 10% more power and at the same time a much faster and more precise reaction. This improves driving dynamics and traction. For even better durability at extreme stress, a water cooling system has been added, which is integrated into the engine's cooling system, incl. a separate electric water pump and a separate oil/water heat exchanger.
Front axle tread has been increased by 48 mm and 33 mm on the rear axle.
Rear axle steering switches to a more dynamic setup in Sport Plus mode.
10% more direct steering than on 997.
3. Generation PCCB (997 uses 2. generation PCCB) with calipers made of aluminum (997: stainless steel), which results in a further weight reduction and more ceramic compound in the discs, resulting in a much better durability under high stress to avoid excessive wear on the track like on the "old" generation.
PCCB front discs 410 mm (997: 380 mm) and rear discs 390 mm (997: 350 mm).
Optional Sport Classic rims not offered in Japan.
Sport Plus mode specifically "tuned" for race track.
Front fenders are made of aluminum.
10 l more luggage room (front)
The rear wing adapts it's angle to open or closed sun roof.
At speeds over 270 kph, you cannot operate the PAA (Porsche Active Aerodynamics) system.
In Performance mode, front axle downforce is 44 kg (997: 18 kg drag) and rear axle downforce is 88 kg (997: 27 kg)
Battery capacity has increased to 95 Ah (997: 70 Ah)
Engine control unit is Siemens SDI 9 (997: SDI 3.1)
991 Turbo S has different camber setting (-35' +/- 15') than 991 Turbo (-50' +/-15').
991 Turbo S turning circle is 0.3 meters shorter at 10.6 m (997: 10.9 m)
991 Turbo S uses ABS 9.0 (997: ABS 8.0)
991 Turbo S has 1 mm more ground clearance than 997 model.
Angle of slope is 10.3° (997: 7,8°), huge difference.
Frontal area is 2,07 qm (997: 2,05 qm).
991 C2S 成績已經比 997 GT3 mk2 快
991 Turbo S 比997 Turbo S mk2 快了6秒
6:57.00 Porsche 918 Spyder (Weissach-Package) 13
7:18.00 Porsche 911 GT2 RS (997) 10
7:25.00 Porsche 911 GT3 (991) 13
7:26.00 Porsche 911 Turbo S (991) 13
7:27.00 Porsche 911 GT3 RS 4.0 (997) 11
7:28.00 Porsche Carrera GT 03
7:29.00 Porsche 911 Turbo (991) 13
7:31.00 Porsche 911 GT2 (997 mk1) 07
7:32.00 Porsche 911 Turbo S (997 mk2) 10
7:33.00 Porsche 911 GT3 RS (997) 10
7:37.90 Porsche 911 Carrera S (991) 11
7:38.00 Porsche 911 Turbo (997 mk1) 06
7:40.00 Porsche 911 GT3 (997 mk2) 09
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