April Four, 2017
Munich. A month forward of the primary race of the 12 months in
Hockenheim (GER), BMW Motorsport could be very smartly ready for the
2017 DTM. Whilst the drivers and groups can name on a wealth of
enjoy as they pass into the 6th season since BMW’s go back to
the fiercely-competitive traveling automobile sequence, the automobile is a
newcomer: BMW Motorsport strains up this 12 months with the BMW M4 DTM,
which has been advanced consistent with the brand new technical
With 4 titles in 3 years: the car designation BMW M4
DTM is synonymous with nice good fortune. Marco Wittmann (GER) received
the Drivers’ name with this automobile in each 2014 and 2016. BMW
Group RMG additionally picked up the Groups’ name in 2014, whilst BMW received
the Producers’ Championship in 2015. This 12 months sees the
crack of dawn of a brand new technology. Within the mild of the brand new rules, the BMW
M4 DTM has been given a workover and gone through vital
building. The BMW M4 DTM now generates over 500 hp of engine
energy, whilst the aerodynamics have additionally been the topic of
in depth adjustments. Leading edge generation used to be used when
production the elements.
“We’re very a lot taking a look ahead to the brand new DTM season. The
many adjustments are essentially geared toward something: much more
spectacle for lovers on the circuit and observing on display screen,” stated
BMW Motorsport Director Jens Marquardt. “I actually like the brand new,
extra tough vehicles. The drivers on the wheel will make even
extra of a distinction at some point, and lovers gets even
nearer to the groups and drivers on the circuit. This
mixture guarantees to supply an exciting season in 2017. Our
engineers have labored laborious during the last few months to increase
a bunch of detailed new answers for the BMW M4 DTM, in response to
the DTM rules for the 2017 season. I’m very happy with
this crew effort. One among my non-public highlights is the brand new glance
of the BMW M4 DTM. The blue crosses are a design component that
originates from the long-lasting BMW three.Zero CSL of the 1970s. Any DTM
fan may also recognise the blue crosses from the mythical BMW
M3 DTM within the 1980s, once they had been nonetheless caught on. In 2017, we
do that digitally – as may be the case, as an example, with the
new BMW 7 Sequence. We’re taking a look ahead to the primary race
weekend in Hockenheim.”
Wind of Alternate.
The rules required the BMW Motorsport engineers to take a
new solution to aerodynamics when growing the BMW M4 DTM. A
shorter diffusor and the truth that the experience top has been
higher consistent with rules, scale back downforce and ‘grimy
air’. The glide topology across the automobile used to be totally revised.
The entrance bumper now has a fully new form and bureaucracy the
place to begin for the glide of the air across the automobile. The wing
mirrors could have a extra standard design once more in 2017
consistent with the rules. A number of the many obviously visual
adjustments are the much more outstanding contouring of the
facet channel, the vent ducts at the rear wheel arches, which
are getting used for the primary time, and the extremely detailed
design of the rear of the automobile.
The rear wing may be some of the extra simply recognisable
adjustments to the 2017 DTM vehicles. The Drag Relief Machine (DRS)
has been changed. Up till now, the rear wing consisted of
only one profile and used to be reduced as one section when DRS used to be
prompted. The rear wing of the brand new BMW M4 DTM is made up of
two profiles, with the simply the highest profile tilting upwards
when DRS is activated. In contrast to prior to, the top plates now not
transfer with the wing. The variability of adjustment for the machine is
as much as 40 levels for 2017, making it extra environment friendly than final
The entrance splitter and underbody of the DTM vehicles are usual
elements, in line with the brand new rules. The similar
is going for the ground panel, which is 5 millimetres thicker
than prior to. The rear diffusor additionally has a fully new form
and is shorter and flatter than that of the former fashion.
Over the process the aerodynamic building of the brand new BMW
M4 DTM within the BMW Crew’s Aero Lab, the engineers needed to be
much more environment friendly than same old: they’d simply 50 days during which
to check the brand new fashion within the wind tunnel and to optimise it. As
a consequence, CFD calculations, simulations and the fast
prototyping of elements from wind tunnel fashions performed a extra
Much more energy.
In the case of the engine, the DTM rules for the 2017
season permit a bigger diameter for the air restrictors, thru
which the engine attracts in its combustion air. Having enlarged
the air restrictors from 2 x 28 millimetres to two x 29
millimetres, the price cycle used to be tailored accordingly. This
higher the engine efficiency by way of about 25 hp to over 500 hp.
For the reason that engine, now referred to as the P66/1, takes extra cooling,
because of the higher efficiency, the cooling air intakes
in opposition to the entrance of the automobile had been additionally changed. As some other
result of the better energy, much more tough and
sturdy carbon-fibre brake disks are extensively utilized within the DTM in
In its ultimate spec, the BMW V8 engine is composed of virtually 800
other elements. In general, the powerhouse is made up of
virtually Four,000 person portions. When designing the DTM energy
unit, BMW took complete benefit of the technological technology of
the BMW Crew. The high-tech foundry on the BMW plant in
Landshut contributed the massive castings, corresponding to cylinder heads
and crankcases. The processing of the castings, their coating,
and any essential thermal remedy, used to be carried out by way of the
suitable specialist departments in Munich.
BMW Energy remains to be transferred to the observe by means of a
six-speed, sequential racing transmission, which is operated
pneumatically by means of shift paddles at the guidance wheel. It has
11 transmission ratios, which enable the engineers and
drivers to react to the circuit and engine traits when
setting-up the automobile.
Leading edge generation for even better potency.
The engine mount is a posh structural part, which is
positioned beneath nice pressure, and connects the engine body to the
engine. It used to be manufactured in particular for the DTM automobile the use of
an additive three-D printing process and optimised the use of topology.
BMW Motorsport engineers and their colleagues from BMW
manufacturing building had been considered pioneers within the
box of additive production for many years. In combination, they’re
forging forward with this future-oriented production
generation, expanding each the potency and velocity of the
manufacturing of motorsport elements. Since 2015, BMW Motorsport
has used a water pump wheel made on a three-D printer in its DTM
engines. The high-precision part, which is matter to excessive
stresses, is composed of an aluminium alloy and has confirmed its
value within the tricky motorsport surroundings.
The chassis for the 2017 DTM season is composed of many usual
portions: surprise absorbers, anti-roll bar, wishbone, wheel mounts,
wheel hubs and wheel nuts are actually prescribed as usual.
Then again, the BMW Motorsport engineers had loose rein when it
got here to the facet springs and the 3rd component of the entrance
axle, in addition to the configuration and structure of the usual
The carbon-fibre monocoque is once more instrumental in making sure
the protection of the drivers within the new BMW M4 DTM. With an
built-in tank, metal roll cage, and extra crash
parts, it supplies efficient coverage for the motive force in
case of an coincidence.
New stipulations, lap by way of lap.
The interplay between the chassis and the 2017 era of
Hankook race tyre used to be additionally of serious significance. With a brand new
design and new compound, the DTM’s tyre spouse is including
some other thrilling component to the approaching season. The brand new dry tyre
for the DTM – the Ventus Race – will generate better grip than
its predecessor when in just right situation. Against this, alternatively,
it’s going to degrade sooner and extra dramatically, relying at the
using taste. That is what the automobile producers and
organisers had supposed, and it’s going to have a vital impact
on lap instances.
In any case, new, feature LED entrance lighting spherical off the
look of the 2017 fashion. They actually give the automobile a
“dynamic glance”. The rear lighting have additionally been redesigned.
Marco Wittmann discusses the BMW M4 DTM on video.
All through the DTM checks in Hockenheim, DTM champion Marco Wittmann
took day trip to give an explanation for crucial adjustments to
his Purple Bull BMW M4 DTM. You’ll to find the video above.
A compact have a look at the important thing adjustments to the BMW M4
Entrance lighting: Blue crosses are a throwback to iconic BMW fashions
at the observe and at the highway – from the BMW three.Zero CSL and the
first-generation BMW M3 within the DTM to the present BMW 7 Sequence.
BMW P66 /1 engine: Expanding the diameter of the air
restrictors has boosted engine energy to over 500 hp. As a
result, additional adjustments had been made.
Flicks: More effective design of aerodynamic attachments, in
accordance with rules.
Bumper: Re-designed entrance finish together with entrance splitter for
environment friendly airflow, in response to adjustments to aerodynamics, as
specified within the rules.
Wing mirrors: Lowered aerodynamics within the wing reflect house, in
accordance with rules.
Tyres: New Hankook tyre development and compound. Generates
better grip than its predecessor when in just right situation. In
distinction, alternatively, it’s going to degrade sooner and extra
dramatically, relying at the using taste. That is what the
automobile producers and organisers had supposed, and it’s going to have
a vital impact on lap instances.
Chassis: Quite a lot of elements of the chassis and brakes have
been standardised, as have the wheel rims. Then again, the
suspension kinematics in addition to the configuration of the
dampers and is derived can nonetheless be adjusted in my opinion.
Ground panel: The picket flooring panel is 5 millimetres
thicker, in line with rules. This results in a
better experience top, and because of this to much less downforce.
Aspect channel: As on the entrance and rear of the automobile, the air glide
has additionally been changed within the facet channel.
Rear wing: The DRS has been changed. The 2017 rear wing
is composed of 2 portions, with the higher section tilting upwards when
DRS is operated. The machine is most often extra environment friendly.
Diffusor: The rear diffusor at the new BMW M4 DTM is shorter
than that of its predecessor, with a purpose to conform to new
rules. As such, it generates much less downforce.
Rear lighting: Design of rear lighting in step with the design
replace of the brand new BMW M4 Coupé.
Rear apron: Entire overhaul of the rear apron and adjustment
to fit changed glide topology – as an example, because of new rear
Technical Knowledge BMW M4 DTM.
Period: Four,725 mm
Width: 1,950 mm
Top: approx. 1,200 mm
Weight: 1,120 kg (in line with rules, with out
motive force, depending on efficiency ballast)
Sort: P66/1, 90° V8 aspirated engine
Capability: three,999 cc
Weight: 148 kg
Bore: 93 mm
Stroke: 73.6 mm
Engine velocity: max. eight,500 rpm
Efficiency: over 500 hp
Air restrictors: 2 x 29.Zero mm, in line with rules
Cylinder block and cylinder head created from forged aluminium at
the BMW foundry in Landshut; metal crankshaft; 4 valves in line with
cylinder, operated by way of bucket tappets; metal camshafts, pushed
by way of chains; Low force, intake-manifold gas injection, one
injection nozzle in line with cylinder; dry sump machine
Acceleration: Zero-100 km/h in 2.6 sec.
Best velocity: approx. 285 km/h
Tank capability: 120 litres
Carbon-fibre monocoque with built-in tank and metal roll
cage; carbon-fibre crash parts on aspects; carbon-fibre crash
parts on entrance and rear
Sequential 6-speed sports activities gearbox, operated by means of pneumatic shift
paddles fixed at the guidance wheel; Four-plate ZF carbon-fibre
grasp; adjustable multi-disc limited-slip differential
Entrance axle/rear axle:
Double wishbone suspension with struts and adjustable surprise
absorbers (six settings); H&R springs
Hydraulic dual-circuit brake machine; alloy, monoblock brake
callipers; internally-ventilated, carbon-fibre brake disks
entrance and rear; brake steadiness adjustable by way of motive force;
electromagnetic get started valve
Aluminium cast wheels; 18” x 12” entrance, 18” x 13” rear
Hankook; entrance: 300-680-18, rear: 320-710-18 (new design and