R8 LMS (GT3)
The Audi R8 LMS is the racing version of the R8. Despite looking identical to a regular R8, the LMS shares very little with its road-going counterpart in terms of features and mechanics. A new race specification V10 engine develops a peak power output of 430 kW. The removal of the standard all-wheel-drive system and the intelligent mix of materials such as aluminum in the Audi Space Frame (ASF), a structural CFRP component and the steel roll cage alone make the chassis about 30 kg lighter, now weighing 252 kg. At the same time, the torsional stiffness of the stressed frame has increased by 39 percent. These weight-saving measures result in a weight of just 1225 kg. Aside from that, the car packs many safety features such as a modified spaceframe structure at the front and a carbon fibre crash element at the rear protect the driver in a crash, the special PS1 racing seat from the Audi R18 e-Tron Quattro which has been known to set the safety standards for LMP1 cars is used for additional safety and is connected directly to the chassis for increased stiffness. A quickly adjustable foot lever system and a height and length adjustable safety steering column allow versatile adjustment to various drivers. A rescue opening in the roof as used in DTM race touring cars is implemented in the R8 LMS GT3, a first for any GT3 car, after an accident, it allows the driver's helmet to be lifted in a way that avoids straining the spinal column.
Although the combination of the materials in the R8 LMS is more complex, Audi has managed to integrate the manufacturing process for production and race cars even more closely than before. In a new manufacturing facility at the Bollinger Hofe industrial park in Heilbronn, Quattro GmbH produces both variants in combination. Although the race car, for example, is fitted with aluminum cast joints and a steel roll cage the racing chassis of the R8 LMS remains integrated into the basic production process up to and including the stages of the roof assembly and cathodic dip painting (CDP), which is a form of priming. Following these production steps, the race cars are completed in Heilbronn-Biberach. The new aerodynamic concept of the Audi R8 LMS for the first time includes a fully lined underfloor and a conceptually integrated rear diffuser. As a result, the dimensions of the rear wing can be reduced without a corresponding increase of aerodynamic drag. The wheel arches, which are open rearwards via a larger cross-section, contribute to improved airflow. The airflow rate and cooling area of the radiator at the front have increased by ten percent to handle maximum outside air temperatures. In order to improve the race drivers' ability to concentrate on their tasks, fresh air circulation in the cockpit has been improved. At a speed of 200 km/h, the airflow rate is 250 litres per second. Audi has achieved these improvements despite the significantly higher constraints imposed on aerodynamics design by the 2016 regulations.[34]
The Audi R8 LMS Evo was unveiled in 2018 ahead of the 2019 season. The car saw new bodywork, including a new front splitter to improve downforce, and an improved gearbox. The car was available for customers to buy as new, or as an evo kit for pre-existing Audi R8 LMS models.[35]
In 2021 Audi Sport revealed the Audi R8 LMS Evo II, which saw improved Aerodynamics, engine characteristics, air conditioning, suspension and traction control. The car is available to buy as new, or as an upgrade kit for a previous generation Audi R8 LMS.[35]