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Mercedes-AMG V12 Engine
Mercedes-AMG provides the heart for the
Pagani Huayra. The 60 degree 12 cylinder turbocharged engine with a displacement
of six liters has been developed not just to meet the strictest technical and
quality requirements, but also to give the car its many faces.
and harmony of driving one of the world's most refined GT car is interrupted
when the driver calls upon the Pagani Huayra to unleash its 700 horsepower and
738 lb-ft of torque. The turbos have been studied to offer immediate response to
the slightest throttle input, giving the driver full control over the engine at
any rpm and preventing unwanted delays in the delivery of power.
engine's systems have been designed and tested to stand up to the most adverse
conditions of temperature and performance. The Pagani Huayra has been subjected
to the highs of Death Valley and the lows of the Arctic Circle. The two lateral
radiators are positioned in the front to guarantee the best cooling efficiency
of the intercoolers placed over the cylinder heads. Dry sump lubrication ensures
an optimal oil feed to the engine even when the car is subjected to the most
extreme lateral accelerations.
The M158 engine is homologated to meet the
strictest environmental regulations, EU5 and LEV2. Despite the increase of power
compared to the other Mercedes-AMG V12 engines developed for Pagani, CO2
emissions as well as the fuel consumption have been reduced, to make the Huayra
class leading amongst 12 cylinder sports cars with values that are respective of
much smaller vehicles in the market. The two stage fuel supply system features
two microprocessor controlled pumps feeding fuel to the engine with the second
pump only activated when necessary, thus reducing the energy required to run the
fuel pumps and eliminates the waste of excessive fuel being transported and
heated in the fuel lines. This efficiency combined with a large 85 liter fuel
tank ensure Pagani Huayra's grand touring ability.
As an homage to the
decennial tradition of Mercedes-AMG in building world class sports car engines,
the M158 displays the historic AMG emblem on the intake manifold alongside the
name of the technician that assembled the engine by hand at the Mercedes-AMG
headquarters in Affalterbach, Germany.
Titanium Exhaust Provides
The Titanium exhaust system has been engineered by
MHG-Fahrzeugtechnik and is a direct application of race proven technologies on a
high performance road car and the complete exhaust weighs less than 22 lbs (10
kg). Careful attention has been paid to the tuning of its sound, which has led
to a harmonic rumble at idle speeds with a hint of the power that lies hidden at
low speed and a deep thunderous growl of motor and air, reminiscent of an
airplane, at high speeds.
and prodigious torque generated by Huayra's V12 are transferred to the wheels
through a transverse sequential seven speed gearbox and a dual plate clutch and
the complete gearbox weighs only 212 lbs (96 kg). Keeping the weight of the rear
overhang as low as possible has been a priority as we aim for a neutral behavior
at the limit. A further benefit of this layout is a better behavior of the car
during a rear impact. A dual clutch system was evaluated but ultimately not
selected as it would have increased the weight by approximately 154 lbs (70 kg),
thus negating any minor improvement in shift-time.
The suspension geometry has been designed to further enhance the sure-footed
nature already present in the Zonda on the longer wheelbase Huayra. The
individual suspension made with forged AvionAl double A-arms have been tested
extensively on the Zonda R program. Incorporated into the wheel hub assemblies
are cooling ducts that connect directly to the support brackets, thus extending
the reliability and lifespan of the bearings. Pushrod operated adjustable Öhlins
shock absorbers keep everything under control and have been optimized for the
dynamic requirements of the vehicle.
Pirelli Tires Developed
Exclusively for Pagani Huayra
To assure complete control for the
driver, Pirelli has developed the bespoke P Zero tires specifically for the
Pagani Huayra. The Pirelli engineers were faced with a demanding task, combining
road holding for excitement behind the steering wheel and lower rolling
resistance to reduce CO2 emissions and fuel consumption. These P Zero tires are
built in a dedicated MIRST (Modular Integrated Robotized System) facility,
dedicated to the production of ultrahigh performance tires and are at the
forefront of what is technically possible, suited to top speeds above 230 mph
(370 km/h) as well as to lateral forces exceeding 1,5 G.
System of Flaps for More Downforce
The aerodynamic concept of the
Pagani Huayra is that of a wing. The vehicle can modify the properties of this
wing by varying the front ride height, which can be adjusted dynamically, and by
adjusting the 4 control flaps on each of the four corners of the car. The goal
is to have a neutral vehicle behavior under all conditions and control body roll
via aerodynamic means. The behavior of the flaps is managed by a dedicated
control unit that is fed information from the ABS and ECU, which pass
information about the car's speed, yaw rate, lateral acceleration, steering
angle and throttle position.
The system improves aerodynamic efficiency
in a variety of driving conditions, where a low drag coefficient is not the
determining factor. During braking, for example, the rear flaps and the front
suspension are raised to counteract the weight transfer and balance the weight
distribution between front and rear axles, allowing a better use of the rear
brake force. Another vital design tenant for the Pagani Huayra project was to
ensure clean airflow over the body of the car. The shape of the two engine air
intakes behind the occupants shoulders are a tribute to the supersonic aircraft
of the late 1950s and 1960s, but also allow the motor breath without disrupting
the flow. The intake for the gearbox radiator is located between the engine bay
window and the carbon clamshell of the rear bonnet, which provides an excellent
airflow to the radiator without having a substantial impact on aerodynamic drag.
This decision also led to the omission of a rear wing, replaced by the movable
In addition to the downforce generated by the flaps and body, two
high negative pressure areas were designed into the shape of the underbody and
the diffuser at the rear, thus enhancing the aerodynamic stability and
guaranteeing the Pagani Huayra downforce under all circumstances.
Prototypes Test Each Aspect of the Pagani Huayra
To this date five
prototypes have been built which have been conducting road tests for the past 4
years. Currently, over 300,000 miles (or half a million kilometers) have been
covered by the prototypes and before entering the US market Pagani will have
reached 700,000 test miles (one million kilometers). Each prototype has been
assigned to a specific development task. At Mercedes-AMG one is used to develop
drivability, and another is used for emission development. One car is operated
constantly by Bosch Engineering for the application of ABS and advanced
stability and performance enhancement systems. Still another vehicle is used for
gearbox testing, and general vehicle dynamics development.
Pagani to be Officially Sold in the US
Pagani will begin selling the
Huayra in the U.S. through a dealer network beginning in 2011. The U.S. arrival
of its high-styled Huayra allows stateside enthusiasts the opportunity to obtain
a Pagani automobile in the U.S. for the first time, and bolsters Pagani as a
major player in the world's largest automotive market.
"We are thrilled
at the opportunity to represent the Pagani
brand in the United States and we look forward to the successful launch of the
Huayra," said Horacio Pagani, the company founder. "This automobile is the
result of five years of dedicated effort from the Pagani team and we see this as
an unprecedented opportunity to continue expanding our vision of the future for
the supercar industry."
Pagani Huayra: Photo Gallery, Review (1/2) and Specifications