Ford sierra cosworth rs500

Это настоящая икона 80-х годов. Таких автомобилей было построено только 500 штук на заводе Aston Martin…
Страшненький, но очень серьезный, этим и привлекает, "вот, что тюнинг животворящий делает" на нём можно и за продуктами съездить, и оторваться на треке! Благодаря Cosworth довольно неказистая Сьерра превратилась в легенду гонок, как кольцевых, так и раллийных. Особой красоты в нём не найдёшь, но он мне нравится как и почти каждый хот-хетч. Его характеристики не плохи даже сейчас что уж говорить про конец 80-х начало 90-х годов, тогда это был суперкар с внешностью чуть видоизменённого автомобиля. Sierra, как ни странно, довольно высоко ценилась на мировом рынке даже на рубеже 90-х. Тем более, побывавшая в руках родственного ателье Cosworth. Даже, не самую мощную или быструю 220-сильную Sierra Cosworth 4×4 нередко называли "суперавтомобиль за полцены". А после рестайлинга, сменившего внешность из далекого 1982 года на современные линии, как у более дорогой Scorpio, число её поклонников возросло в разы.

Специально под эту модель Cosworth разработал целое семейство моторов. Началось все в 1984 году с Cosworth YAA — 1993-кубового 4-цилиндрового мотора, получившего перспективную 16-клапанную головку цилиндров с двумя приводимыми ремнем распредвалами, созданного на основе так называемого Pinto-блока, которых успели построить всего три штуки. Однако, несмотря на все нововведения, ему элементарно не хватало мощности, поэтому, по модной в то время традиции, ему в помощь еще до конца года быстро приспособили небольшую дополнительную турбину, получив новый двигатель — прототип YBA, который уже мог похвастаться 203-сильной мощностью. По мере испытаний пилотной партии из десяти моторов, он превратился в так необходимую для омологационной процедуры "серийную" версию Cosworth YBB ( 207 л.с.), которую в 1985 году смогли "размножить" в количестве пяти тысяч экземпляров и оснастили вышеупомянутый Sierra RS Cosworth, дожидающийся омологации. В 1986 году, для оснащения автомобилей раллийной Group A подготовили первую специализированную модификацию YBC, в зависимости от настроек выдающую от 284 до 305 сил. В 1987 году двигатель оснастили увеличенным турбокомпрессором, непосредственным впрыском с двумя топливными форсунками на каждый цилиндр, получив 235-сильную версию YBD для Sierra RS500 Cosworth (на боевых автомобилях мощность достигала более, чем 500-558 сил, что и было отражено в наименовании модели). Ослабленная 204-сильная версия YBE попала под капот недавно упоминаемому Panther Solo 2, а 400-сильная YBF стала стандартным гоночным автомобильным мотором для Sierra RS Cosworth. К 1989 году были подготовлены "экологичные" 210-сильные версии YBG и YBJ со сниженной токсичностью выхлопа, для американского и европейского рынков, а Cosworth YBH стал альтернативной заменой для YBF. По-видимому, версия YBM, появившаяся в начале 90-х, стала последней модификацией этой спортивной ветки. Зато, для набирающей спортивный авторитет модели Ford Escort RS Coswort с полноприводной трансмиссией, были предложены новые версии этого мотора — в 1992—1994 годах, "большой" YBT с турбокомпрессором Garrett T34 и, с 1994 по 1996 год, "малый" Cosworth YBP c Garrett T25, электронным впрыском Ford EEC IV, двойной системой зажигания с независимыми контурами и регулируемой подачей топлива. Как стало традицией, различные по характеристикам версии получили дополнительное различие по окраске клапанных крышек. YBB ( 3-дверная заднеприводная Sierra Cosworth, или аналогичный седан Sierra Sapphire), YBD ( Sierra RS500) и YBJ ( полноприводный Sierra Sapphire 4WD) можно было опознать по красной клапанной крышке. Оснащенный катализатором Coswort YBG ( Sierra Sapphire 4WD Cosworth) получил зеленую, версия Cosworth YBT ( Escort 4WD Cosworth) — синюю, а Cosworth YBP ( полноприводный Escort Cosworth) — серебристую.

Все автомобиль от Wolf Racing получили модернизированный двухлитровый турбомотор с гоночными поршнями, новым бензонасосом, перепускным клапаном, обновленным блоком управления, высокопроизводительными форсунками и стальной выхлопной системой. После доработок отдача агрегат выросла с 227 до 300 лошадиных сил.

Ford Sierra RS Cosworth Overview Manufacturer

Production Body and chassis Body style Layout Related Powertrain Engine Transmission Dimensions Length Width Height Curb weight
Ford Europe
1986–1992
3-door hatchback (1986—1987)
4-door saloon (1988—1992)
front engine,

rear wheel drive (1986—1989)

four wheel drive (1990—1992)

Ford Escort RS Cosworth
Cosworth YBD, 204 hp (1986)

Cosworth YBG/YBJ, 220 hp (1990—1992)

5-speed

Borg Warner T5 (1986—1989)

Ferguson 4×4 MT75 (1990—1992)

446 cm (1986—1987)
449 cm (1988—1992)
173 cm (1986—1987)
170 cm (1988—1992)
138 cm (1986—1992)
1217 kg (1986—1987)

1206 kg (1988—1989)

1305 kg (1990—1992)

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The Ford Sierra RS Cosworth is a high-performance version of the Ford Sierra that was built by Ford Europe from 1986 to 1992. It was the result of a Ford Motorsport project with the purpose of producing an outright winner for Group A racing in Europe. [1]

Contents

Development [ edit ]

The project was defined by Stuart Turner in the spring of 1983. He had recently been appointed head of Ford Motorsport in Europe, and he realised right away that Ford was no longer competitive in this area.

Turner got in touch with Walter Hayes, at the time the vice-president of public relations at Ford, to get support for the project. Hayes had earlier been the driving force behind the development of the Ford GT40 that won Le Mans in 1966, and the Cosworth DFV engine that brought Ford 154 victories and 12 world championships in Formula One during the 1960s and 1970s. Hayes found the project very appealing and promised his full support.

Turner then invited Ken Kohrs, vice-president of development, to visit Ford's longtime partner, the automotive company Cosworth, where they were presented a project developed on Cosworth's own initiative, the YAA engine. This was a twin cam, 16-valve engine based on Ford's own T88 engine block, better known as the Pinto. This prototype proved an almost ideal basis for the engine Turner needed to power his Group A winner.

Therefore, an official request for a turbocharged version (designated Cosworth YBB) capable of 180 HP on the street and 300 HP in race trim, was placed. Cosworth answered positively, but they put up two conditions: the engine would produce not less than 150 kW (204 HP) in the street version, and Ford had to accept no fewer than 15,000 engines. Turner's project would only need about 5,000 engines, but Ford nevertheless accepted the conditions. The extra 10,000 engines would later become one of the reasons Ford also chose to develop a four-door, second generation, Sierra RS Cosworth.

To find a suitable gearbox proved more challenging. The Borg-Warner T5, also used in the Ford Mustang, was chosen, but the higher revving nature of the Sierra caused some problems. Eventually Borg-Warner had to set up a dedicated production line for the gearboxes to be used in the Sierra RS Cosworth.

Many of the suspension differences between the standard Sierra and the Cosworth attributed their development to what was learned from racing the turbocharged Jack Roush IMSA Merkur XR4Ti in America and Andy Rouse's successful campaign of the 1985 British Saloon Car Championship. Much of Ford's external documentation for customer race preparation indicated "developed for the XR4Ti" when describing parts that were Sierra Cosworth specific. Roush's suspension and aerodynamics engineering for the IMSA cars was excellent feedback for Ford. Some production parts from the XR4Ti made their way into the Cosworth such as the speedometer with integral boost gauge and the motorsport 909 chassis stiffening plates.

In April 1983, Turner's team decided on the Sierra as a basis for their project. The Sierra filled the requirements for rear wheel drive and decent aerodynamic drag. A racing version could also help to improve the poor, and somewhat undeserved, reputation that the Sierra had earned since its introduction in 1982.

Lothar Pinske, responsible for the car's bodywork, demanded carte blanche when it came to appearance in order to make the car stable at high speed. Experience had shown that the Sierra hatchback body generated significant aerodynamic lift even at relatively moderate speed.

After extensive wind tunnel testing and test runs at the Nardò circuit in Italy, a prototype was presented to the project management. This was based on an XR4i body with provisional body modifications in fibreglass and aluminium. The car's appearance raised little enthusiasm. The large rear wing caused particular reluctance. Pinske insisted, however, that the modifications were necessary to make the project successful. The rear wing was essential to retain ground contact at 300 km/h, the opening between the headlights was needed to feed air to the intercooler and the wheel arch extensions had to be there to house wheels 10” wide on the racing version. Eventually, the Ford designers agreed to try to make a production version based on the prototype.

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In 1984, Walter Hayes paid visits to many European Ford dealers in order to survey the sales potential for the Sierra RS Cosworth. A requirement for participation in Group A was that 5,000 cars were built and sold. The feedback was not encouraging. The dealers estimated they could sell 1,500 cars.

Hayes did not give up, however, and continued his passionate internal marketing of the project. As prototypes started to emerge, dealers were invited to test-drive sessions, and this increased the enthusiasm for the new car. In addition, Ford took some radical measures to reduce the price on the car. As an example, the car was only offered in three exterior colours (black, white and moonstone blue) and one interior colour (grey). There were also just two equipment options: with or without central locking and electric window lifts.

Production [ edit ]

The Ford Sierra RS Cosworth was first presented to the public at the Geneva Motor Show in March 1985, with plans to release it for sale in September and closing production of the 5,000 cars in the summer of 1986.

In practice, it was launched in July 1986, and 5545 were manufactured in total of which 500 were sent to Tickford for conversion to the Sierra three-door RS500 Cosworth. The vehicles were manufactured in right hand drive (RHD) only, and were made in Ford's Genk factory in Belgium. The following number of vehicles were registered in the UK:

1985 10
1986 1064
1987 579
Total 1653

As published in the 1986 RS catalog:

  • Max speed: 149 mph
  • 0-60 mph: 6.5 sec
  • Fuel consumption at 56 mph: 38.2 mpg
  • Fuel consumption at 75 mph: 30.1 mpg
  • Drag coefficient: 0.345
  • Rear spoiler: 20kgf at 150mph
  • Front brakes: Disc 28.3 cm diameter
  • Rear brakes: Disc 27.3 cm diameter
  • Differential: Viscous coupled limited slip
  • Tyre size: 205/50 VRx15
  • Wheels: 15"x7" alloys

Sierra RS500 Cosworth [ edit ]

Mike Moreton was head of the team that planned to develop an evolution edition aimed at making the car unbeatable on the race tracks. In March 1987, Aston Martin Tickford was signed for the job of converting the 500 cars.

The Cosworth RS500 was announced in July 1987, and was homologated in August 1987.

The main difference to the Sierra three-door Cosworth was the uprated Cosworth's competition engine. Its new features were: [2]

  • The Inline-four engine had a thicker walled cylinder block to cope with the rigours of the track
  • Bore X Stroke of 90.8 mm (3.57 in) X 77 mm (3.03 in)
  • Displacement of 1,994 cc (2.0 L; 121.7 cu in)
  • A larger Garrett AiResearch T04 turbocharger
  • A larger air-air intercooler
  • A second set of four Weber IW025 "yellow" fuel injectors and a second fuel rail (not activated in the roadgoing version)
  • An uprated fuel pump
  • A reworked induction system to allow higher power outputs to be realised
  • An uprated oil and cooling system
  • The rear semi-trailing arm beam had extended but unused mounting points
  • Engine output increased to 227 PS (224 hp; 167 kW) at 6000 rpm
  • Max. torque of 277 N⋅m (204 lb⋅ft) at 4500 rpm. [3]

The RS500 also had minor external cosmetic differences to its parent the Sierra three-door Cosworth:

  • The rear tail gate had a lower spoiler in addition to the upper "whale tail", which had an added lip
  • Discreet RS500 badges on the rear tail gate and front wings
  • A redesigned front bumper and spoiler to aid cooling and air flow, including the removal of the fog lamps and their replacement with intake grilles to supplement brake cooling
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Exactly 500 RS500s were produced, all of them RHD for sale in the UK only — the biggest market for this kind of Ford car. It was originally intended that all 500 would be black, but in actuality 56 white and 52 moonstone blue cars were produced. [1]

Some European tuners, missing a LHD RS500 version, have set up some elaborate versions of the Sierra RS Cosworth for private customers, replicating some of the RS500's specs. The most famous tuner dedicated to this project was Wolf Racing, who was already racing and winning as official team with the Sierra from 1986 through 1989 in the German touring car championship Deutsche Tourenwagen Masters.

The official tuning kit for the engine included:

  • Racing pistons
  • Green injectors
  • Bigger petrol pump
  • Racing wastegate
  • Electronic control chip
  • Steel exhaust

Concerning the aesthetics:

  • Lowered sport suspensions
  • 16" wheels with gold alloys (BTTC racing version)
  • RS500 original aero kit
  • RS500 decals
  • Tinting films on rear windows
  • RS500 instrumentation with 300km/h full-scale
  • Additional integrated instrumentation in the central console
  • Racing gear knob
  • Sport pedals

The declared power was 260 PS, although some owners claim at least 40 PS more. From 1986 through 1989 (nearly two years after the end of production of the first series), n.10 street-legal RS500 replicas -in Ford's moonstone blue colour- have been manufactured.

Motorsport achievements [ edit ]

Touring car racing [ edit ]

In August 1987, the Sierra RS500 Cosworth was homologated with a larger turbo, new rear deck spoiler and an extra 100 horsepower. Fords took pole position in all the remaining six 1987 World Touring Car Championship events, and was first over the finish line in four of them. Disqualification of the works Eggenberger Motorsport cars from the 1987 Bathurst 1000 in Australia for wheel arch panel irregularities deprived Klaus Ludwig and Klaus Niedzwiedz of the world championship. The Eggenberger Motorsport team d >[4] [5] Eggenberger won the 1989 Spa 24 Hours. Robb Gravett won the 1990 British Touring Car Championship in a RS500. Essentially the Evolution RS500 was the creation of Eggenberger who insisted the editions he proposed for the Evolution would make the Sierra a winner and dominate touring car racing around the world.

The RS500 was successful in the 1988 DTM with Klaus Ludwig in the Ford Team Grab winning the drivers championship and Wolf Racing winning the Team Championship, Both Grab and Wolf were Ford Works Teams and beat Mercedes-AMG Boss along with BMW M Sport for the honours.

The RS500 was successful in Australian touring car racing with Dick Johnson Racing dominating the 1988 and 1989 Australian Touring Car Championships, with Dick Johnson and John Bowe finishing one-two in both years. Early in 1988, the Johnson team also took the step of homologating a modified Ford nine-inch axle for the Sierra, eliminating the car's drivetrain weakness and allowing the cars to be driven harder with less fear of failure. This was also seen as essential in Australia which used standing starts compared to the rolling starts used in Europe.

The RS500 won the Bathurst 1000 twice; in 1988 with Tony Longhurst and Tomas Mezera and in 1989 with Johnson and Bowe. It also won the 1988 Sandown 500 with Allan Moffat and Gregg Hansford. Robbie Francevic won the New Zealand Touring Car Championship in 1989 and 1990 for Mark Petch Motorsport.

Major wins [ edit ]

Major series and race wins by the Ford Sierra RS500 include:

Источник: autobryansk.info

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