2017款保时捷911 RSR勒芒赛车近日亮相洛杉矶车展。该车采用中置引擎布局，将参加明年LM-GTE级别比赛，包括勒芒24小时耐力赛。这款车搭载一台4.0升水平对置六缸引擎，工程人员为该车配备了更大后空气动力学散流器。这台自然进气引擎功率375千瓦/510马力，搭配六速顺序式变速器和锁止后差速器，将动力传递至路面。这款车的其他部件，也经过优化更适合比赛。包括硕大刹车盘搭配六活塞卡钳，后轮配备中央锁止轮圈，尺寸为12.2英寸（约合310毫米）。车厢内防滚架替代了普通的内装，另外还有桶形座椅，赛车安全带，赛车方向盘表面设置开关和控制键以及各种其他安全设备。座椅牢牢的固定在地板上，因此踏板位置改变以便能容纳驾驶员。该车将于明年1月28日这Daytona首次参赛，全部仅生产19辆。

2017 Porsche 911 RSR Le Mans racer goes mid-engine
If there’s one defining factor about the Porsche 911, it’s always been the car’s rear-engine layout. That’s changing now, though, with the new 911 RSR. As spy photos had indicated, big changes are in store for the racer. The car has a mid-engine layout and will campaign in 19 races in the LM-GTE category in 2017, including the 24 Hours of Le Mans.

By putting the 4.0-liter flat-six engine ahead of the rear axle, Porsche says that engineers were able to install a larger rear aerodynamic diffuser. That engine is a naturally aspirated unit that, depending on what restrictor is required by series rules, will produce around 510 horsepower (375 kilowatts). It’s connected to a six-speed sequential transmission with a locking rear differential channeling power to the ground.

Every other component of the Porsche 911 RSR is, of course, optimized for racing. The massive brakes have six-piston calipers, while the center-lock wheels have rear tires measuring a whopping 12.2 inches in width. A full roll cage replaces a regular Porsche interior, along with a bucket seat, race harnesses, a race steering wheel covered in switches and controls, and various other racing safety features. The seat is solidly mounted to the floor, so the pedal assembly moves to accommodate each driver.

The Porsche 911 RSR will make its racing debut on January 28, 2017, at Daytona. With a total of 19 races planned.