Image credits: © BMW.

2017 BMW M4 DTM news, pictures, specifications, and information

A new challenger in the starting blocks: a detailed look at the BMW M4 DTM for the 2017 season

Munich. A month ahead of the first race of the year in Hockenheim (GER), BMW Motorsport is very well prepared for the 2017 DTM. While the drivers and teams can call on a wealth of experience as they go into the sixth season since BMW's return to the fiercely-competitive touring car series, the car is a newcomer: BMW Motorsport lines up this year wîth the BMW M4 DTM, which has been developed according to the new technical regulations.

With four titles in three years: the vehicle designation BMW M4 DTM is synonymous wîth great success. Marco Wittmann (GER) won the Drivers' title wîth this car in both 2014 and 2016. BMW Team RMG also picked up the Teams' title in 2014, while BMW won the Manufacturers' Championship in 2015. This year sees the dawn of a new era. In the light of the new regulations, the BMW M4 DTM has been given a workover and undergone significant development. The BMW M4 DTM now generates over 500 hp of engine power, while the aerodynamics have also been the subject of extensive modifications. Innovative technology was used when manufacturing the components.

'We are very much lòòking forward to the new DTM season. The many changes are primarily aimed at one thing: even more spectacle for fans at the circuit and watching on screen,' said BMW Motorsport Director Jens Marquardt. 'I really like the new, more powerful cars. The drivers at the wheel will make even more of a difference in the future, and fans will get even closer to the teams and drivers at the circuit. This combination promises to produce a thrilling season in 2017. Our engineers have worked hard over the past few months to develop a host of detailed new solutions for the BMW M4 DTM, based on the DTM regulations for the 2017 season. I am very proud of this team effort. One of my personal highlights is the new look of the BMW M4 DTM. The blue crosses are a design element that originates from the iconic BMW 3.0 CSL of the 1970s. Any DTM fan will also recognise the blue crosses from the legendary BMW M3 DTM in the 1980s, when they were still stuck on. In 2017, we do this digitally – as is also the case, for example, wîth the new BMW 7 Series. We are lòòking forward to the first race weekend in Hockenheim.'

Wind of Change.The regulations required the BMW Motorsport engineers to take a new approach to aerodynamics when developing the BMW M4 DTM. A shorter diffusor and the fact that the ride height has been increased in line wîth regulations, reduce downforce and 'dirty air'. The flow topology around the car was completely revised. The front bumper now has a completely new shape and forms the starting point for the flow of the air around the car. The wing mirrors will have a more conventional design again in 2017 according to the regulations. Among the many clearly visible modifications are the even more prominent contouring of the side channel, the vent ducts on the rear wheel arches, which are being used for the first time, and the incredibly detailed design of the rear of the car.

The rear wing is also one of the more easily recognisable changes to the 2017 DTM cars. The Drag Reduction System (DRS) has been modified. Úp until now, the rear wing consisted of just one profile and was lowered as one part when DRS was triggered. The rear wing of the new BMW M4 DTM is made up of two profiles, wîth the just the top profile tilting upwards when DRS is activated. Únlike before, the end plates no longer move wîth the wing. The range of adjustment for the system is up to 40 degrees for 2017, making it more efficient than last year.

The front splitter and underbody of the DTM cars are standard components, in accordance wîth the new regulations. The same goes for the floor panel, which is five millimetres thicker than before. The rear diffusor also has a completely new shape and is shorter and flatter than that of the previous model.

Over the course of the aerodynamic development of the new BMW M4 DTM in the BMW Group's Aero Lab, the engineers had to be even more efficient than usual: they had just 50 days in which to test the new model in the wind tunnel and to optimise it. As a result, CFD calculations, simulations and the rapid prototyping of components from wind tunnel models played a more significant role.

Even more power.

When it comes to the engine, the DTM regulations for the 2017 season allow a larger diameter for the air restrictors, through which the engine draws in its combustion air. Having enlarged the air restrictors from 2 x 28 millimetres to 2 x 29 millimetres, the charge cycle was adapted accordingly. This increased the engine performance by about 25 hp to over 500 hp. Because the engine, now known as the P66/1, takes more cooling, due to the increased performance, the cooling air intakes towards the front of the car were also modified. As another consequence of the greater power, even more powerful and durable carbon-fibre brake disks are also used in the DTM in 2017.

In its final spec, the BMW V8 engine consists of almost 800 different components. In total, the powerhouse is made up of almost 4,000 individual parts. When designing the DTM power unit, BMW took full advantage of the technological know-how of the BMW Group. The high-tech foundry at the BMW plant in Landshut contributed the large castings, such as cylinder heads and crankcases. The processing of the castings, their coating, and any necessary thermal treatment, was performed by the appropriate specialist departments in Munich.

BMW Power continues to be transferred to the track via a six-speed, sequential racing transmission, which is operated pneumatically via shift paddles on the §teering wheel. It has eleven transmission ratios, which allow the engineers and drivers to react to the circuit and engine characteristics when setting-up the car.

Innovative technology for even greater efficiency.

The engine mount is a complex structural component, which is placed under great strain, and connects the engine frame to the engine. It was manufactured specifically for the DTM car using an additive 3D printing procedure and optimised using topology.

BMW Motorsport engineers and their colleagues from BMW production development have been regarded as pioneers in the field of additive manufacturing for decades. Together, they are forging ahead wîth this future-oriented manufacturing technology, increasing both the efficiency and speed of the production of motorsport components. Since 2015, BMW Motorsport has used a water pump wheel made on a 3D printer in its DTM engines. The high-precision component, which is subject to high stresses, consists of an aluminium alloy and has proven its worth in the tough motorsport environment.

The chassis for the 2017 DTM season consists of many standard parts: shock absorbers, anti-roll bar, wishbone, wheel mounts, wheel hubs and wheel nuts are now prescribed as standard. However, the BMW Motorsport engineers had free rein when it came to the side springs and the third element of the front axle, as well as the configuration and layout of the standard parts.

The carbon-fibre monocoque is again instrumental in ensuring the safety of the drivers in the new BMW M4 DTM. With an integrated tank, steel roll cage, and additional crash elements, it provides effective protection for the driver in case of an accident.

New conditions, lap by lap.

The interaction between the chassis and the 2017 generation of Hankook race tyre was also of great importance. With a new design and new compound, the DTM's tyre partner is adding another exciting element to the coming season. The new dry tyre for the DTM – the Ventus Race – will generate greater grip than its predecessor when in good condition. In contrast, however, it will degrade faster and more dramatically, depending on the driving style. This is what the car manufacturers and organisers had intended, and it will have a significant effect on lap times.

Finally, new, characteristic LED front lights round off the appearance of the 2017 model. They literally give the car a 'dynamic look'. The rear lights have also been redesigned.

Source - BMW

The countdown is on: BMW Motorsport concludes preparations for the new season with the DTM Media Day in Hockenheim.

This week, BMW Motorsport and the teams concluded preparations for the new season wîth four days of testing at the Hockenheimring (GER), the location of the first two DTM races of the year on 6th and 7th May 2017. All six BMW DTM drivers were in action between Monday and Thursday, gathering experience wîth the newly-developed BMW M4 DTM. The six drivers rounded off the week wîth numerous interviews and photo shoots during the DTM Media Day.

In total, the two BMW teams RMG and RBM completed 880 laps of the 4.574 kilometre-long Hockenheimring circuit. DTM champion Marco Wittmann (GER), Augusto Farfus (BRA), Tom Blomqvist (GBR), Timo Glock (GER), Maxime Martin (BEL) and Bruno Spengler (CAN) all had a chance to get behind the wheel of the cars that deliver over 500 HP. The teams also used the tests to get used to the new procedures for pit stops. The combined 'RMR' car crew also practised working together at the race track.

'The stage is set for a great DTM season,' said BMW Motorsport Director Jens Marquardt. 'You could sense a real upbeat mood at today's Media Day in Hockenheim. It was a fantastic feeling. Just like the fans, we are really lòòking forward to the season finally starting. From a competition point of view, we have learned a lot again on this final stretch of the season preparation. Every lap of the Hockenheimring is extremely useful to help us prepare perfectly for the curtain raiser. We did not do as much driving as we had hoped but tests are there to gather experience. I am confident that the new technical regulations and the changes that have been made to the sporting regulations will ensure that we enjoy 18 thrilling races.'

Wittmann starts the season as defending champion and is counting the days until the first race. 'It was a long winter break - but the break is not boring if you are the champion. These final tests were really important. It is always better to be able to sort out any difficulties wîth the new car during preparation, instead of on the first race day. And it is great to conclude the test by setting the fastest lap time on the final afternoon. So, I am really optimistic for the start of the season. The anticipation is growing wîth every passing day.'

Source - BMW
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