BMW M4 DTM (naturally-aspirated)
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 Augusto Farfus driving a BMW M4 DTM at Hockenheimring. | |||||||||
| Category | Deutsche Tourenwagen Masters (Touring Cars) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor |  BMW | ||||||||
| Predecessor | BMW M3 DTM | ||||||||
| Successor | BMW M4 Turbo DTM | ||||||||
| Technical specifications | |||||||||
| Chassis | Carbon-fibre monocoque | ||||||||
| Suspension (front) | Double wishbones with H&R spring and ZF Sachs damper units to front and rear axles, actuated via pushrods | ||||||||
| Suspension (rear) | As front | ||||||||
| Length | 4,775–5,010 mm (188–197 in) | ||||||||
| Width | 1,950 mm (77 in) | ||||||||
| Height | 1,200 mm (47 in) | ||||||||
| Axle track | 1,950 mm (77 in) | ||||||||
| Wheelbase | 2,750 mm (108 in) | ||||||||
| Engine | BMW P66 (2014-2016) later P66/1 (2017-2018) 4.0 L (244 cu in) V8 90° naturally-aspirated, front engined, longitudinally mounted | ||||||||
| Transmission | Hewland 6-speed sequential semi-automatic paddle shift | ||||||||
| Battery | Braille B128L Micro-Lite lithium racing battery 12 volts | ||||||||
| Power | 460 hp (343 kW) (2014-2016) later over 500 hp (373 kW) (2017-2018) @ 7,500 rpm, 500 N⋅m (370 ft⋅lbf) torque | ||||||||
| Weight | 1,110 kg (2,447 lb) (2014); 1,120 kg (2,469 lb) (2015-2016); 1,125 kg (2,480 lb) + BoP weight allowance of 1,095–1,140 kg (2,414–2,513 lb) (2017 - abolished since Austrian round); 1,115 kg (2,458 lb) (2018) including driver | ||||||||
| Fuel | Aral Ultimate unleaded 102 RON racing gasoline | ||||||||
| Lubricants | Castrol EDGE (2014) later Shell Helix Ultra (2015-present) | ||||||||
| Brakes | AP Racing carbon brake discs with 6-piston calipers and pads | ||||||||
| Tyres | Hankook Ventus BBS (2014-2016) later ATS (2017-present) wheels | ||||||||
| Clutch | ZF 4-plate carbon fibre reinforced plastic clutch | ||||||||
| Competition history | |||||||||
| Notable entrants |  Team RBM Team Schnitzer Team MTEK Team RMG | ||||||||
| Notable drivers |  Augusto Farfus Joey Hand Bruno Spengler Martin Tomczyk Timo Glock António Félix da Costa Marco Wittmann Maxime Martin Tom Blomqvist Philipp Eng Joel Eriksson Alessandro Zanardi | ||||||||
| Debut | 2014 Hockenheimring 1 Deutsche Tourenwagen Masters round | ||||||||
| |||||||||
| Constructors' Championships | 2 (2014, 2015) | ||||||||
| Drivers' Championships | 2 (2014, 2016) | ||||||||
The BMW M4 DTM is a touring car constructed by the German car manufacturer BMW for the Deutsche Tourenwagen Masters. It was developed in 2013 and partook in DTM races 2014-2018 before being replaced by the turbo-updated BMW M4 Turbo DTM. The M4 DTM is based on the production model BMW M4 and replaced the BMW M3 DTM after the 2013 season.
Technical characteristics
Development
The first model made its first appearance in the wind tunnel at the BMW Group's Aero Lab on April 22. just 13 days before the opening race of the 2013 season in Hockenheim. In the summer of 2013, while continuing with aerodynamic testing, the experts in Munich turned their attention to designing new suspension parts. The new components made their first on-track outing in December 2013 being trialled on the BMW M3 DTM at that point. The final parts for the chassis of the BMW M4 DTM were in production by the end of the year, allowing the BMW teams to assemble the first models of the new car in January and February. 300 days after the first test in the wind tunnel, the BMW M4 DTM made its track debut in Monteblanco on February 11th, 2014.
Production
The last BMW M car to roll off the assembly line at the main BMW Plant in Munich did so back in 1991. After that, production shifted to the BMW Plant in Regensburg. Almost 23 years later, the assembly process returned to the main factory. BMW Motorsport engineers were located close by developing and improving the racing version of the new car.However, the BMW Plants in Regensburg and Dingolfing were still involved in the development of the BMW M4 DTM. For instance, the long test tracks at the modern production facilities were used for aerodynamic tests. Throughout the development phase, the BMW M4 DTM car was seen at the venue for the exhaustive quality control checks performed on all BMW M cars.
The BMW M4 Coupé and the BMW M4 DTM lie low and flat on the tarmac. Even when stationary, the design's contours underline the performance of the two models. Characteristic design elements, such as the modern take on the twin headlight arrangement and distinctive twin-bar kidney grille, ensure that the car clearly stands out as a BMW M vehicle. The proportions typical of the BMW M4 Coupé, such as the long bonnet, long wheel base, set-back greenhouse and a short front overhang, formed the basis for the low and aerodynamic silhouette of the BMW M4 DTM.
Aerodynamics
Aerodynamics play a vital role in DTM. For this reason, the BMW Motorsport engineers devoted a lot of time to issues such as aerodynamic drag and air flow. Equal to the production model, the air curtains at the front of the BMW M4 DTM are designed to reduce air drag. Narrowing air ducts accelerate the airstream flowing through the front skirt, guide it systematically past the wheels, and reduce turbulence around the wheel arches. Another new feature on the BMW M4 DTM is a plate along the side channel. The flatter rear window optimizes the way the airflow approaches the rear wing. The wing mirrors, with their twin-stalk mounts, are already a prominent feature of the production model. The mirrors on the BMW M4 DTM have been aerodynamically optimized for the racetrack to ensure they aid efficient airflow towards the rear of the car.
Lightweight construction
The use of carbon is widespread in motor racing and virtually the entire body of the BMW M4 DTM is made of this ultra-light and durable material. The weight reduction and consequent lowering of the centre of gravity are key to the car's performance on the racetrack. The weight of the BMW M4 DTM, with driver, is 1,110 kilograms.
The BMW M4 Coupé lends itself to be an example of intelligent, lightweight construction. The car weighs just 1,497 kilograms, which is 80 kilograms less than its predecessor. This reduction of weight has a positive effect on the driving dynamics and fuel consumption. This was made possible by the extensive use of lightweight materials, such as carbon fibre, reinforced plastic, and aluminum.
Safety
Like the BMW M4 Coupé, the racing version also meets highest safety standards. Over 50 of the 5,000+ parts that make up the BMW M4 DTM are standard components, which are used in all DTM cars. One of these is the carbon fibre monocoque, which set the benchmark in terms of safety. With an integrated tank, steel roll cage and additional crash elements, it offers the driver effective protection in case of a crash. Parts like the gearbox, clutch, dampers and rear wing are identical in all DTM cars. This also minimizes development costs.
Engine
BMW M4 DTM carried over the existing P66 V8 engine that was previously used by its predecessor BMW M3 DTM and conforms to the 2000 DTM engine regulations. The BMW P66 engine generates approx. 480 bhp with the air restrictor specified in the technical regulations. It is made up of 800 different components, consisting of 3,900 individual parts. When designing the DTM drivetrain, BMW Motorsport took full advantage of the technological know-how within the BMW Group. The high-tech foundry connected to BMW Plant Landshut accounts for the large cast parts, such as the cylinder head and crankcase, which it does for the production of the six-cylinder in-line engine for the BMW M4 Coupé as well.
The BMW M4 DTM accelerates from 0 to 100 km/h in about three seconds. Only ten engines are permitted for all eight BMWs over the course of the entire season. Therefore, reliability is a prerequisite to success.
The engine's power is transferred via a sequential six-speed sport gearbox, which is operated pneumatically using shift paddles mounted on the steering wheel. The gearbox is one of the standard components, which are used by all the DTM manufacturers. It has 11 final drive ratios, which allow the engineers and drivers to react to the respective circuit and engine characteristics when setting the car up.
Steering wheel
Additional status displays and a customized layout of the controls are said to make the steering wheel in the new BMW M4 DTM more comfortable for the drivers. The individual buttons can be allocated to the driver's preference.
As with the racing car, the gears on the BMW M4 Coupé can also be changed using shift paddles on the steering wheel, depending upon the configuration.
Lights
Drivers of both the BMW M4 DTM and the BMW M4 Coupé can rely on the performance of modern LED headlamps. Compared to conventional filament lamps, BMWs light emitting diodes save energy and allow the driver to see break lights ahead more easily. The light generated by LEDs is also very similar to sunlight, making it easy on the eye.[1]
Debut
With the homologation of the M4 DTM completed on 3 March 2014, the car's race debut was at the 2014 Hockenheimring 1 Deutsche Tourenwagen Masters round on 4 May 2014. BMW Team RMG's Marco Wittmann scored his M4 DTM's first victory in their M4 debut.[2] Two weeks later in Motorsport Arena Oschersleben, BMW Team RMG's Marco Wittmann scored his M4 DTM's first pole position after Audi's Miguel Molina was stripped of pole position.[3]
Teams and drivers
In the 2014 DTM season lined-up eight drivers on for four teams. Augusto Farfus and Joey Hand start for BMW Team RBM. Bruno Spengler and Martin Tomczyk for BMW Team Schnitzer. Timo Glock and António Félix da Costa start for BMW Team MTEK. Marco Wittmann and Maxime Martin start for BMW Team RMG. Wittmann won the championship with four wins, and Martin won a race.
In the 2015 DTM season lined-up eight drivers on for four teams. Augusto Farfus and Tom Blomqvist start for BMW Team RBM. Bruno Spengler and Timo Glock for BMW Team Schnitzer. António Félix da Costa and Martin Tomczyk start for BMW Team MTEK. Marco Wittmann and Maxime Martin start for BMW Team RMG. Five different drivers claimed a win.
In the 2016 DTM season lined-up eight drivers on for four teams. Maxime Martin and Tom Blomqvist start for BMW Team RBM. António Félix da Costa and Timo Glock for BMW Team Schnitzer. Bruno Spengler and Augusto Farfus start for BMW Team MTEK. Marco Wittmann and Timo Glock start for BMW Team RMG. Wittmann won the championship with three wins.
In the 2017 DTM season lined-up six drivers on for two teams. Maxime Martin, Bruno Spengler and Tom Blomqvist start for BMW Team RBM while Marco Wittmann, Augusto Farfus and Timo Glock start for BMW Team RMG.
In the 2018 DTM season lined-up six drivers on for two teams. Philipp Eng, Bruno Spengler and Joel Eriksson start for BMW Team RBM while Marco Wittmann, Augusto Farfus and Timo Glock remained same for BMW Team RMG.
Achievements
As of August 2017, BMW M4 DTM scored 16 victories, 20 poles, 13 fastest laps, 1 constructor title (2015) and 2 driver titles (courtesy of Marco Wittmann in 2014 and 2016).
Gallery
Timo Glock, Hockenheimring, 2014
Augusto Farfus, Hockenheimring, 2015
Martin Tomczyk, Hockenheimring, 2016
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References
- ^ "BMW Motorsport : Cars : BMW M4 DTM". Archived from the original on 2016-09-22. Retrieved 2016-09-25.
- ^ "Hockenheim DTM: BMW's Marco Wittmann dominates 2014 opener".
- ^ "Oschersleben DTM: Miguel Molina excluded, Marco Wittmann on pole".