The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.
101-722: The Supercars Championship currently known as the Repco Supercars Championship under sponsorship, is a touring car racing category in Australia and New Zealand, running as an International Series under Fédération Internationale de l'Automobile (FIA) regulations, governing the sport. Supercars events take place in all Australian states and the Northern Territory , with the Australian Capital Territory formerly holding
202-498: A compression ratio of 10:1. The Holden teams had the option of using the Group A -developed 5.0-litre Holden V8 engine , although this was restricted to the second-tier privateer teams from 1994 onwards, forcing the major Holden runners to use the more expensive Chevrolet engine. The V8s were first eligible to compete in the endurance races of 1992 . The distinctive aerodynamics package, consisting of large front and rear spoilers ,
303-698: A new street race on a shortened version of the Adelaide Grand Prix Circuit became one of the first festival-style events, which would become common in later years. Australia's capital city, Canberra , hosted its first event on the Canberra Street Circuit in 2000 . In 2001 , a championship round was held in New Zealand for the first time, at Pukekohe Park Raceway . In 2002 , the V8 Supercar support event at
404-566: A turbocharger or supercharger ) is used, the compression ratio is often lower than naturally aspirated engines . This is due to the turbocharger or supercharger already having compressed the air before it enters the cylinders. Engines using port fuel-injection typically run lower boost pressures and/or compression ratios than direct injected engines because port fuel injection causes the air–fuel mixture to be heated together, leading to detonation. Conversely, directly injected engines can run higher boost because heated air will not detonate without
505-478: A "parity formula" which attempts to ensure that competitors using any of the available car models compete on an equal basis. In this aspect, it is similar in philosophy to the NASCAR Cup Series .The category's current rules, and the charter between organisers and teams state that "..to the extent that it is possible, Competition will take place between the different makes and models of Cars as equalised by
606-417: A 60% share and TEGA the other 40%. A new board of directors was appointed, with two TEGA representatives and two AMRP representatives. In 2011, Archer Capital purchased a 65% shareholding in the series with the teams owning the other 35%. In December 2021, both Archer Capital and the teams sold their shareholdings to Race Australia Consolidated Enterprises. In the middle of 2008, a project led by Mark Skaife
707-568: A 75% share in AVESCO, with SEL owning the other 25%. TEGA was responsible for the rules and technical management of the series and the supply of cars and drivers, while SEL was responsible for capturing and maintaining broadcasting rights, sponsorship, licensing, and sanction agreements. The expansion of the series began in 1998 , with the first round to be held in the Northern Territory taking place at Hidden Valley Raceway . In 1999 ,
808-659: A Ford and Holden duopoly in 2020 with the departure of Nissan, while Ford replaced the Falcon with the Mustang in 2019. Holden announced its final year of competition in 2022, to be replaced by the Chevrolet Camaro ZL1 for the 2023 season. Starting in 2026, Toyota will make its debut in the championship, competing with the GR Supra . The concept of a formula centred around V8-engined Fords and Holdens for
909-729: A common design. Touring car racing is also referred to as saloon car racing . Worldwide Modern World Touring Car Championship (WTCC) started in 2005 , evolving from the reborn European Touring Car Championship . The series merged with the TCR International Series and became the World Touring Car Cup (WTCR) starting from 2018 . In 2023 , the WTCR was replaced by the TCR World Tour . Running at major international racing facilities, this series
1010-400: A compression ratio of 14:1 to 16:1. In a piston engine , the static compression ratio ( C R {\displaystyle \mathrm {CR} } ) is the ratio between the volume of the cylinder and combustion chamber when the piston is at the bottom of its stroke , and the volume of the combustion chamber when the piston is at the top of its stroke . It is therefore calculated by
1111-486: A drag-reduction system (DRS) designed to encourage overtaking. More than 20 works-backed entries of the Opel Astra , Audi TT and Mercedes-Benz CLK contested the revived 2000 DTM series but a serious issue developed for the series when Opel pulled out ahead of the 2006 season. BMW would eventually replace Opel as the series' third manufacturer for 2012, while Mercedes-AMG withdrew at the end of 2018. Mercedes-AMG
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#17327802279121212-689: A few in Denmark . The most successful car makes were Volvo, BMW, Audi, and Nissan. In 2010 the championship merged with the Danish Touringcar Championship to form the Scandinavian Touring Car Championship . The 2010 champion was Robert Dahlgren , because he had achieved the best results from selected races in the Danish and Swedish championships. Rickard Rydell and Johan Kristoffersson won
1313-543: A front spoiler and splitter ,and a rear wing . The aerodynamics package for each manufacturer is homologated after a series of tests which ensure that the different body styles produce near-identical downforce and drag numbers. By modern racing vehicle standards, Supercars have relatively low amounts of downforce. This is intended to make it easier to follow other cars, and make the handling more similar to road cars. The Gen 3 cars were originally reported to produce about 140 kg of downforce at 200 km/h, similar to
1414-399: A fuel being present. Higher compression ratios can make gasoline (petrol) engines subject to engine knocking (also known as "detonation", "pre-ignition", or "pinging") if lower octane-rated fuel is used. This can reduce efficiency or damage the engine if knock sensors are not present to modify the ignition timing. Diesel engines use higher compression ratios than petrol engines, because
1515-514: A mid-mounted gearbox; the repositioning of the fuel tank to in front of the rear axle to improve safety; replacing the windscreen with a polycarbonate unit; and a switch from 17 inches (430 mm) to 18 inches (460 mm) wheels. In 2011, it was announced that the Car of the Future would not be introduced until 2013 . In February 2012, Nissan confirmed that they would enter the series under Car of
1616-480: A non-championship race at Fuji Speedway along with the full GT500 grid, labelled the 'SUPER GT x DTM Dream Race'. Aston Martin withdrew from the event as they intended to focus on developing the Vantage package for 2020, however this never eventuated as the program was ended. Audi announced in late April 2020 that they would be discontinuing their involvement in the series after the end of the 2020 season, following
1717-438: A road-registerable Porsche 911 GT3 RS . Revisions in 2024 are stated to produce about 20% more downforce. The minimum weight of each car is 1,335 kilograms (2,943 lb) including the driver and excluding the fuel, with a minimum load of 725 kg over the front axle. The minimum weight for the driver is 95 kg and includes the driver dressed in a full racing suit the seat and seat mountings and any ballast needed to meet
1818-588: A second round held at the Yas Marina Circuit in Abu Dhabi . In November 2010, the series was granted international status by the FIA for the 2011 season , allowing the series to race at up to six international venues each year. As a result, the series name was changed to the 'International V8 Supercars Championship'. 2008 saw the separate boards of directors of VESA and TEGA merge into a single board that
1919-473: A six-piston caliper, while the rear discs are 355 millimetres (14.0 in) diameter and have a four-piston caliper. The cars use 18-inch (460 mm) control wheels, produced by Rimstock and supplied by Racer Industries, and control tyres from Dunlop. Supercars are provided with Soft, Supersoft, and Hard slick tyres as well as grooved wet tyres for each event, The requirement to use varying compounds and how many tyres need to be changed per race are dependent on
2020-469: A test of reliability and pit crews as much as car, driver speed, and consistency. Touring car racing started in the mid twentieth century as a long-format style of competition that took place on public roads between numerous towns. The cars were crewed by a driver and, because of their unreliability, a mechanic who carried tools and spares. The legacy of these beginnings can still be seen in modern touring and GT cars – the driver sits offset from
2121-403: A trophy. In Australia, Supercars enjoys a strong support base that is still driven in large part by the tribal Ford versus Holden battle. Over 200,000 total spectators attend the four-day Adelaide 500 and Bathurst 1000 events, and the 2019 Bathurst 1000 drew a maximum of 2.36 million television viewers across the country. This compares favourably with other major sporting events such as
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#17327802279122222-556: A variable compression ratio was introduced in 2019. Variable compression ratio is a technology to adjust the compression ratio of an internal combustion engine while the engine is in operation. This is done to increase fuel efficiency while under varying loads. Variable compression engines allow the volume above the piston at top dead centre to be changed. Higher loads require lower ratios to increase power, while lower loads need higher ratios to increase efficiency, i.e. to lower fuel consumption. For automotive use this needs to be done as
2323-429: A year of running its Nissan Altimas privately, Supercars reverted to a two-make Ford vs. Holden competition. Different sets of regulations do apply: Compression ratio A fundamental specification for such engines, it can be measured in two different ways. The simpler way is the static compression ratio : the ratio of the volume of the cylinder when the piston is at the bottom of its stroke to that volume when
2424-464: Is a polytropic value for the ratio of specific heats for the combustion gases at the temperatures present (this compensates for the temperature rise caused by compression, as well as heat lost to the cylinder) Under ideal (adiabatic) conditions, the ratio of specific heats would be 1.4, but a lower value, generally between 1.2 and 1.3 is used, since the amount of heat lost will vary among engines based on design, size and materials used. For example, if
2525-599: Is broadcast in 137 countries and has an average event attendance of over 100,000. With over 250,000 in attendance annually, the Adelaide 500 is the most attended Supercars race in Australia . The vehicles used in the series are loosely based on road-going cars. Cars are custom made using a control chassis, with only certain body panels being common between the road cars and race cars. The cars are controlled for "technical parity" - ensuring that teams and drivers using any of
2626-628: Is higher with more conservative intake camshaft timing (i.e. soon after BDC), and lower with more radical intake camshaft timing (i.e. later after BDC). Regardless, the dynamic compression ratio is always lower than the static compression ratio. Absolute cylinder pressure is used to calculate the dynamic compression ratio, using the following formula: P cylinder = P atmospheric × CR γ {\displaystyle P_{\text{cylinder}}=P_{\text{atmospheric}}\times {\text{CR}}^{\gamma }} where γ {\displaystyle \gamma }
2727-681: Is intended to extend to aerodynamics, engine performance, and handling characteristics. In practice, achieving technical parity has proven difficult and contentious, with a number of changes for the 2023 and 2024 season to aerodynamics and engines. The body of each car is based on its corresponding production car in Right Hand Drive and with homologation requirements. The bodies of both models are aerodynamically balanced through these homologations requirements, along with general balancing upon entering Composite and Exotic materials are generally not permitted. The tail lamps are carried over from
2828-668: Is popular in the United States . While the cars do not move as fast as those in formula or sports car races, their similarity both to one another and to fans' own vehicles makes for well-supported racing. The lesser use of aerodynamics means following cars have a much easier time passing than in open-wheel racing , and the more substantial bodies of the cars makes the subtle bumping and nudging for overtaking much more acceptable as part of racing. As well as short sprint races, many touring car series include one or more endurance races , which last anything from 3 to 24 hours and are
2929-468: Is supported by BMW , SEAT and Chevrolet . The latter fields a works team, whereas the other two only sell racing kits to be installed on their cars, providing technical support to their customers. In 2011, Volvo also entered the championship, fielding a one-car team as an evaluation for a possible heavier commitment to the series. The World Touring Car Championship features 1.6-litre cars built to Super 2000 regulations based on FIA Group N . Following
3030-460: The 2012 season . The plan was publicly unveiled in March 2010 and was shown to incorporate several key changes to the internal workings of the car. The chassis and the cooling, fuel and electronics systems would all be changed to control parts, with changes to the engine, drivetrain, rear suspension, wheels and the control brake package. The safety of the cars was also to be reviewed and improved. While
3131-583: The 2016 season manufacturer team entries came from BMW, Subaru , MG , and Honda . Since BTCC budgets have been kept relatively low, there is a strong independent and privateer presence in the championship. Manufacturers represented by privateers include Vauxhall , Ford , Toyota , Volkswagen , Chevrolet, and Audi . Prior to 2001 the BTCC was contested by cars built to 2.0-litre supertouring regulations and had in its heyday up to nine different manufacturers. Joachim Winkelhock stated on several occasions that it
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3232-548: The 2020 season , while Ford returned for the 2019 season with the Mustang project. The Commodore will be replaced with a Chevrolet Camaro , which will be sold in Australia by General Motors Specialty Vehicles. Other manufacturers have also appeared in the series, including Nissan with Kelly Racing , Volvo with Garry Rogers Motorsport , and Mercedes-Benz in a non-factory-supported program from Erebus Motorsport . With Kelly Racing's switch to Ford Mustangs for 2020 after
3333-488: The 2023 Bathurst 1000 , the fastest Supercars qualifying lap recorded was 2:04.664 by Brodie Kostecki . On the same race weekend, the fastest qualifying lap recorded by the Carrera Cup cars was 2:04.6672. Touring car racing Touring car racing is a motorsport road racing competition that uses race prepared touring cars. It has both similarities to and significant differences from stock car racing , which
3434-668: The AFL Grand Final with 2.2 million TV viewers in 2019 . Supercars is also popular in New Zealand , with a regular round formerly held in the country (previously held at Pukekohe ) being the only international event on the series calendar. Attempts at further international expansion were made in China , Malaysia , the Middle East , and the United States during the 2000s and 2010s, none of which have survived. As
3535-691: The Australian Touring Car Championship had been established as early as mid-1991. With the new regulations set to come into effect in 1993 , Ford and Holden were both keen to know the details of the new formula by the end of 1991, putting pressure on the Confederation of Australian Motor Sport (CAMS) to provide clarity on the matter. However, CAMS was waiting to see what the FIA did with its proposed international formula for 2.5- and 2.0-litre touring cars. The new rules for
3636-867: The Canberra 400 . Usually, an international round is held in New Zealand, with events previously being held in China, Bahrain, the United Arab Emirates, and the United States. The Melbourne SuperSprint championship event is also held in support of the Australian Grand Prix . Race formats vary between each event, with sprint races between 100 and 200 kilometres (62 and 124 mi) in length, street races between 125 and 250 kilometres (78 and 155 mi) in length, and two-driver endurance races held at Sandown and Bathurst . The series
3737-661: The Ferguson TE20 tractor had a compression ratio of 4.5:1 for operation on tractor vaporising oil with an octane rating between 55 and 70. Motorsport engines often run on high-octane petrol and can therefore use higher compression ratios. For example, motorcycle racing engines can use compression ratios as high as 14.7:1, and it is common to find motorcycles with compression ratios above 12.0:1 designed for 95 or higher octane fuel. Ethanol and methanol can take significantly higher compression ratios than gasoline. Racing engines burning methanol and ethanol fuel often have
3838-570: The Indy 300 on the Gold Coast became a championship round, having been a non-championship event since 1994. Major format changes were made for 1999, with the incorporation of the endurance races into the championship. Control tyres were used for the first time, with Bridgestone selected as the supplier. The series was also renamed from the "Australian Touring Car Championship" to the "Shell Championship Series", by virtue of Shell's sponsorship of
3939-581: The Next Generation Touring Car specification, from 2011 , started a phased transition from Super 2000 cars in an effort to cut costs and improve the sport. Germany/Europe The DTM series, the initials standing for Deutsche Tourenwagen Meisterschaft until 1996, then following a hiatus, revived as Deutsche Tourenwagen Masters in 2000, features advanced purpose built 2.0-litre four-cylinder turbo-powered space frame machines, covered with largely carbon fibre bodyshapes resembling
4040-425: The final drive ratio are fixed with drop gears at the front of the transaxle allowing the teams to alter the overall transmission ratio for different circuits. The cars use a triple plate clutch. The cars run on E75 fuel with a fuel tank capacity of about 130 Litres An electronic control unit (ECU), provided by MoTeC, is used to monitor and optimise various aspects of the engine's performance. Numerous sensors in
4141-566: The 'fastest touring cars in the world' racing at speeds that can reach nearly 300 km/h. They are also the most expensive touring cars in the world with each car costing in excess of $ 1 million (AUD) which includes bespoke $ 250,000 (AUD) 5.0-litre V8 engines producing approximately 635 hp (473 kW). The current formula was devised in 1993 (based on Group A regulations) and branded as 'V8 Supercars' in 1997 and 'Supercars' in 2016. The series features grids of approximately 25 cars, although selected events feature wildcard entries which add to
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4242-677: The 2.0-litre class cars competed in a separate race to the V8s. This was changed for the second round of 1993 after only nine entrants were in the 2.0-litre class for the first round at Amaroo Park . With the new regulations intended to be a parity formula, protests by the Holden teams indicated that the Fords had an aerodynamic advantage after they won the opening three rounds, beating the Commodores comprehensively. After round five at Winton , Holden
4343-704: The ATCC were announced in November 1991 and indicated that the V8 cars would be significantly faster than the smaller-engined cars. In 1992, CAMS looked at closing the performance gap between the classes, only to have protests from Ford and Holden, which did not want to see their cars beaten by the smaller cars. In June 1992, the class structure was confirmed: Both the Ford Falcon EB and Holden Commodore VP ran American-based engines, which were restricted to 7,500 rpm and
4444-671: The Australian Touring Car Championship. They did not contest the endurance races at Sandown and Bathurst, leaving these open solely to the 5.0-litre Ford and Holden models. The Australian Vee Eight Super Car Company (AVESCO) – a joint venture between the Touring Car Entrants Group of Australia (TEGA), sports promoters IMG and the Australian Motor Sports Commission – was formed in November 1996 to run
4545-771: The Car of the Future moniker was dropped in favour of the name "New Generation V8 Supercar". The series continued its international expansion in 2013, with the first event in North America held at the Circuit of the Americas in Austin , Texas . In 2015, five drivers took part in a series of demonstration races at the Kuala Lumpur Street Circuit as part of the KL City Grand Prix . This
4646-573: The Class C cars eligible for 1993 only, the German manufacturer's attention switched to the 2.0-litre class for 1994. Cars from all three classes would contest the 1993 Australian Touring Car Championship , as well as non-championship Australian touring car events such as the Bathurst 1000 . However, for the purposes of race classification and points allocation, cars competed in two classes: Originally,
4747-468: The Falcon, rather than the MacPherson struts used previously, and a Watts link at the rear rather than a Panhard. The aerodynamic packages were comprehensively tested and revised and differences in the porting of each of the manufacturers' engines were also removed. The performance of the new Ford BA Falcon and Holden VY and VZ Commodores was fairly even for the next four years, with Ford winning
4848-401: The Future regulations with Kelly Racing . Later in 2012, Australian GT Championship team Erebus Motorsport announced they would be running Mercedes-Benz cars in the championship, taking over Stone Brothers Racing . In June 2013, Volvo announced it would enter the series in 2014 in a collaboration with its motorsport arm, Polestar Racing and Garry Rogers Motorsport . In November 2013
4949-622: The Gen 3 regulations were introduced for the 2023 Supercars Championship . The main aim was to create closer racing, to reduce costs and to increase road-relevance for the manufacturers. To do this, sweeping aerodynamic changes were made to cut the generated downforce . This reduced the amount of "dirty" air created, and made the cars more challenging to drive. The regulations continued previous changes to ensure technical parity between cars, helping to keep power, downforce and drag levels identical. Engines were also changed, to increase longevity and decrease
5050-564: The Japanese sports car series Super GT which runs a near identical set of rules and regulations in its GT500 class. Honda, Toyota – represented via Lexus , and Nissan each entered a wildcard entry for the final race of the 2019 season at the Hockenheimring . The cars entered were a Nissan GT-R (R35), a Lexus LC 500 and a Honda NSX . For the weekend of the 22nd-24 November, DTM sent three BMW M4s and four Audi RS5s to take part in
5151-609: The Mustang) is a 5.4L V8 with four camshafts and 4 valves per cylinder. These engines were designed to be cheaper and have a higher longevity compared to previous engines, along with being more road-relevant. The Toyota engine (for use in the GR Supra) introduced in 2026 is a 5.0L V8 with DOHC with 4 valves per cylinder. Power is transferred from the engine to the rear wheels through a six-speed sequential transaxle with an integrated spool differential . The individual gear ratios and
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#17327802279125252-602: The NLS series of ten typically four-hour-long races. Cars range from old 100 hp (75 kW) road legal compacts to 500 hp (370 kW) Porsche 996 and even modified DTM cars (1,250 kg (2,760 lb)). Most entrants of the 24 Hours Nürburgring collect experience here. Sweden/Denmark Between 1996 and 2010 the Swedish Touring Car Championship contained various races in Sweden and
5353-480: The UK with cars built to Next Generation Touring Car specification, with ballast being used to equalise performance. From 2011 , cars that ran to the BTCC's own Next Generation Touring Car specification were eligible to compete in a phased move away from Super 2000 regulations. Cars are 2.0-litre saloons , station wagons and hatchbacks with over 350 bhp (260 kW) and can be front or rear-wheel drive. During
5454-455: The car collect information which is then transmitted to the team, allowing them to monitor things such as tyre wear and fuel consumption and find potential problems with the car. The ECU is also used by officials during the scrutineering process. During the race it can also serve functions such as to automatically limit a car's speed. All cars are required to use a double wishbone setup for the front suspension and independent rear suspension. Both
5555-663: The category. Reverse-grid races were introduced for multiple rounds in 2000 before being confined to just the Canberra round for 2001. Also in 2001, compulsory pit stops were introduced at certain rounds and the Top Ten Shootout was used at all rounds. The control tyre supplier changed from Bridgestone to Dunlop in 2002 and the series name was changed to the "V8 Supercar Championship Series" after Shell discontinued their sponsorship. Discussions about parity had returned in 2000, with 100 millimetres (3.9 in) trimmed from
5656-429: The centreline of the car and there is space for a second seat (although they are rarely fitted any more). While rules vary from country to country and series to series, most series require that the competitors start with a standard car body , but virtually every other component may be allowed to be heavily modified for racing, including engines, suspension, brakes, wheels and tires. Aerodynamic aids are sometimes added to
5757-451: The championship in 2011 and 2012 , in a Chevrolet and a VW , respectively. In 2013 the series merged with the TTA – Racing Elite League to form the 2013 STCC – Racing Elite League season , starring 17 drivers for Volvo, BMW, Saab , Citroën , Dacia , and Honda. Australia and New Zealand Formerly the Australian Touring Car Championship , Supercars are recognised internationally as
5858-409: The championship in 2003, 2004 , and 2005 and Holden winning in 2006 . Reverse-grid races were used at certain events in 2006 before unpopularity with the drivers, teams, and fans saw them abolished halfway through the season. The Holden VE Commodore caused controversy when it was introduced in 2007 . The production model was longer, wider, and taller than the rival Ford BF Falcon and outside of
5959-420: The complex shape of V c {\displaystyle V_{c}} it is usually measured directly. This is often done by filling the cylinder with liquid and then measuring the volume of the used liquid. Most engines use a fixed compression ratio, however a variable compression ratio engine is able to adjust the compression ratio while the engine is in operation. The first production engine with
6060-521: The cost of a rebuild. The current Gen 3 regulations are a complete refresh of the previous generation, with the cessation of volume car production in Australia being a major factor. The current cars are the Ford Mustang GT and the Chevrolet Camaro ZL1 . The full list of regulations, Sporting and Technical, can be found on the Supercars website in the operations manual [1] . Supercars is
6161-553: The decline in sales and eventual discontinuation of the Falcon in 2016 and Commodore in 2020 (the two models that exclusively competed in the V8 formula from 1993 to 2012). Ford withdrew all financial support after 2015 , and Holden cut most of its support back to only the Red Bull Holden Racing Team from 2017. Holden was shut down as a brand during 2020, ending its factory involvement in Supercars after
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#17327802279126262-468: The driver in the event of a crash. The fuel tank is positioned in front of the rear axle to prevent it from being damaged or ruptured in a rear end impact. The driver is seated towards the centre of the car and extra reinforcement is used on the roll cage on the driver's side to lessen the risk of injury in a side-on collision. The cars also feature a collapsible steering column and a fire extinguisher system. All cars have an aerodynamics package consisting of
6363-432: The engine is running in response to the load and driving demands. The 2019 Infiniti QX50 is the first commercially available car that uses a variable compression ratio engine. The static compression ratio discussed above — calculated solely based on the cylinder and combustion chamber volumes — does not take into account any gases entering or exiting the cylinder during the compression phase. In most automotive engines,
6464-581: The event The highest speed recorded in a Supercar of any generation is 300.5 km/h on the (downhill) Conrod Straight on the Mount Panorama Circuit , by Shane van Gisbergen in qualifying for the 2023 Bathurst 1000. 2024-spec cars are expected to be about 10 km/h slower. Supercar lap times are similar to the 992 GT3 Cup cars running in the Porsche Carrera Cup Australia Championship . At
6565-430: The first such commercial engine from 2013, used adaptive fuel injectors among other techniques to ease cold start. The compression ratio may be higher in engines running exclusively on liquefied petroleum gas (LPG or "propane autogas") or compressed natural gas , due to the higher octane rating of these fuels. Kerosene engines typically use a compression ratio of 6.5 or lower. The petrol-paraffin engine version of
6666-940: The first time. The series travelled to the Shanghai International Circuit in China in 2005, originally on a five-year agreement, however the promoter of the race dropped their support and the series did not return thereafter. 2006 saw the series travel to the Middle East , with an event held at the Bahrain International Circuit in Bahrain . Multiple new street circuits appeared on the calendar in 2008 and 2009, with new events held in Hamilton in New Zealand , Townsville in North Queensland and at Sydney Olympic Park . The series' Middle East expansion continued in 2010 with
6767-473: The formula C R = V d + V c V c {\displaystyle \mathrm {CR} ={\frac {V_{d}+V_{c}}{V_{c}}}} where V d {\displaystyle V_{d}} can be estimated by the cylinder volume formula: V d = π 4 b 2 s {\displaystyle V_{d}={\tfrac {\pi }{4}}b^{2}s} where Because of
6868-575: The front and rear of the cars. Regulations are usually designed to limit costs by banning some of the more exotic technologies available (for instance, many series insist on a control tire that all competitors must use) and keep the racing close (sometimes by ballast weight where winning a race requires the winner's car to be heavier for subsequent races). Touring cars share some similarity with American stock car racing governed by NASCAR . However, touring cars are, at least notionally, derived from production cars while today's NASCAR vehicles are based on
6969-427: The front and rear suspension systems feature adjustable shock absorbers and an anti-roll bar which, as of the introduction of the Gen 3 regulations, can not be adjusted from inside the car The cars use disc brakes supplied by AP Racing on the front and rear, with the master cylinders provided by AP Racing or former control brake supplier Alcon. The front discs have a diameter of 395 millimetres (15.6 in) and
7070-524: The front spoiler of the Commodore after Holden, in particular, the Holden Racing Team , had dominated in 1998 and 1999. This was in response to the 300 millimetres (12 in) removed from the Falcon in previous seasons, and coincided with a 10 millimetres (0.39 in) trim from the Falcon's rear spoiler. The small reduction for the Holden teams was quickly addressed with both cars receiving
7171-483: The grid. The cars are currently based on the Ford Mustang GT and Holden Commodore (ZB) The minimum weight for a Supercar including driver is 1,395 kg (3,075 lb). The Commodore will be replaced by a Chevrolet Camaro in 2022. The race cars themselves are derived from production body panels and space frame chassis. Both body styles feature an aerodynamic package incorporating large front and rear wings designed to ensure equal aerodynamic performance between
7272-556: The homologated cars have a chance to build and drive a winning car. All cars currently use either a 5.4L or 5.7L Naturally aspirated V8 engine . Originally only for Ford Falcons and Holden Commodores , the new generation V8 Supercar regulations, introduced in 2013, opened up the series to more manufacturers. Nissan were the first new manufacturer to commit to the series with four Nissan Altima L33s followed briefly by Erebus Motorsport with Mercedes-Benz E63 AMGs and Garry Rogers Motorsport with Volvo S60s . The series returned to
7373-463: The intake valve closure (which seals the cylinder) takes place during the compression phase (i.e. after bottom dead centre , BDC), which can cause some of the gases to be pushed back out through the intake valve. On the other hand, intake port tuning and scavenging can cause a greater amount of gas to be trapped in the cylinder than the static volume would suggest. The dynamic compression ratio accounts for these factors. The dynamic compression ratio
7474-450: The lack of a spark plug means that the compression ratio must increase the temperature of the air in the cylinder sufficiently to ignite the diesel using compression ignition . Compression ratios are often between 14:1 and 23:1 for direct injection diesel engines, and between 18:1 and 23:1 for indirect injection diesel engines. At the lower end of 14:1, NOx emissions are reduced at a cost of more difficult cold-start. Mazda's Skyactiv-D ,
7575-577: The limits set by Project Blueprint. As a result, the VE race car was granted custom bodywork – namely shortened rear doors and a lowered roofline to meet the regulations. Despite this, the VE was approved for use in the series, along with the BF Falcon, after several months of preseason testing. Sequential gearboxes were introduced in 2008 and became compulsory by the end of the year. In 2009 , E85 (a fuel consisting of 85% ethanol and 15% unleaded petrol )
7676-488: The manufacturers' road machine (although the roof and roof pillars do originate from the production car). In order to lower costs, the engine power is limited to 610 hp (450 kW), and transmissions, brakes and tyres (Hankook) are standard parts for all. Also, dimensions and aerodynamics are equalised. The approx. 985 kg (2,172 lb) (without driver) DTM cars corner incredibly quickly and wear spectacular bodykits incorporating huge wheel arches and diffusers, plus
7777-534: The minimum weight. Some other components also have a minimum weight, such as the engine and the front uprights All cars must be front-engine, rear-wheel-drive , and powered by a V8 engine designated by Supercars for use in the respected model of car, and balanced in power and weight. Currently, the GM engine (for use in the Camaro) is a 5.7L V8 with a single camshaft and two valves per cylinder. The Ford engine (for use in
7878-491: The piston is at the top of its stroke . The dynamic compression ratio is a more advanced calculation which also takes into account gases entering and exiting the cylinder during the compression phase. A high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air–fuel mixture due to its higher thermal efficiency . This occurs because internal combustion engines are heat engines , and higher compression ratios permit
7979-411: The plans were well received by all of the teams, Holden Motorsport boss Simon McNamara warned potential new manufacturers to stay out of the championship just hours after the plans were released, claiming that they would "gain nothing" from entering the series. Major changes were revealed to include a switch from a live rear axle to independent rear suspension ; the use of a rear transaxle instead of
8080-626: The road car, while the windscreen is replaced by a polycarbonate unit. The cars also carry cameras for broadcasting. The bodies are built around a chassis provided by official accredited builders, including certain race teams. Currently, Triple Eight Race Engineering homologate the Chevrolet Camaro and Dick Johnson Racing homologate the Ford Mustang . The new for 2026 Toyota GR Supra will be homologaged by Walkinshaw Andretti United . Many safety features are utilised to protect
8181-423: The same combustion temperature to be reached with less fuel, while giving a longer expansion cycle, creating more mechanical power output and lowering the exhaust temperature. In petrol (gasoline) engines used in passenger cars for the past 20 years, compression ratios have typically been between 8:1 and 12:1. Several production engines have used higher compression ratios, including: When forced induction (e.g.
8282-411: The same front splitter shortly afterwards, but the Falcon's rear wing remained trimmed. Ford had threatened to withdraw from the series, but nothing came of this. After Holden again dominated in 2001 and 2002, a new set of regulations, dubbed "Project Blueprint", was introduced in 2003 to close the performance gap between the Commodore and the Falcon, thus creating closer, fairer racing. Project Blueprint
8383-412: The same path Mercedes-Benz did after the end of the 2018 season; focusing on electric motorsport, most notably Formula E . This will leave BMW as the sole manufacturer left, putting the series' future in serious jeopardy. Germany Since 1997, and nowadays still on the over 20 kilometres (12 mi) long famous old Nürburgring and other circuits worldwide, in average over 150 touring cars compete in
8484-444: The series has grown, major international motorsport organisations have become involved such as Team Penske , Andretti Autosport , United Autosports and Triple Eight Race Engineering . Both Ford and Holden financially and technically supported their favoured teams and took an active role in promotion of the series from its beginning, but began to wind back and ultimately withdraw their financial commitments approximately in line with
8585-401: The series' revival in 2000. Engine power was increased from ~500 hp to 610 hp, with an extra 30 hp available as part of a push-to-pass system available to drivers for the first time. Downforce levels were also reduced to encourage overtaking and increase top speeds to 300 km/h (186 mph) in order to improve the racing spectacle. In 2019, DTM formed a partnership with
8686-585: The series. This set the foundation for the large expansion of the series during the following years. The category also adopted the name 'V8 Supercars' at this time, though the cars themselves were much unchanged. A new television deal with Network Ten and Fox Sports was organised, although this had follow-on effects for the Bathurst 1000 later in the year. In February, Tony Cochrane and James Erskine left IMG. Together with David Coe, they formed Sports and Entertainment Limited (SEL) in April 1997. TEGA would have
8787-424: The static compression ratio is 10:1, and the dynamic compression ratio is 7.5:1, a useful value for cylinder pressure would be 7.5 × atmospheric pressure, or 13.7 bar (relative to atmospheric pressure). The two corrections for dynamic compression ratio affect cylinder pressure in opposite directions, but not in equal strength. An engine with high static compression ratio and late intake valve closure will have
8888-467: The technical parity mechanisms enshrined in the Rules.". However, the rules go on to state that "The Category is not about equalisation of the abilities of participating Drivers and/or Teams (such equalisation could be, and is in some categories, defined as sporting parity). It is up to individual Drivers and/or Teams to Compete to the best of their abilities under the principle of technical parity." Parity
8989-561: The trend of recent FIA rules, cost control is a major theme in the technical regulation. In 2011 the rules concerning the engine capacity have changed, switching from 2000 cc to 1600 cc turbo engines. Cars equipped with the old 2000 cc engines are still eligible in the championship. Many technologies that have featured in production cars are not allowed, for example: variable valve timing, variable intake geometry, ABS braking and traction control . United Kingdom The British Touring Car Championship (BTCC) currently competes at nine circuits in
9090-516: The two vehicle types. The series incorporates the world famous Bathurst 1000 race as a championship round. Because of the longer distance, regulations require two drivers per car for this race. This also applies to The Bend 500 & the Gold Coast 600 . These events make up the Pirtek Enduro Cup , which is a championship-within-a-championship where the driver combination with most points collected over these three endurance races wins
9191-519: The use of two-door coupé body styles and turbocharged four- or six-cylinder engines. However, no teams elected to build cars to these alternate engine specifications. Cars were still required to be based on front-engined, rear-wheel drive, four-seater production cars that were sold in Australia. The chassis and control components were carried over from the New Generation V8 Supercar regulations, while engine and aerodynamic parity
9292-652: Was designed partly with this in mind, to give the new cars a better chance of beating the Nissan Skyline GT-Rs in those races. The new rules meant that cars such as the turbocharged Nissan Skyline GT-R and Ford Sierra RS500 Cosworth were not eligible to compete in 1993, while cars such as the BMW M3 were. However, the M3 received few of the liberal concessions given to the new V8s and also had an extra 100 kilograms (220 lb) added to its minimum weight, so with
9393-401: Was developed by Paul Taylor and Wayne Cattach, who spent two years designing a formula which would eliminate most of the differences between the Fords and Holdens. Project Blueprint had the chassis pick-up points, wheelbase , track , and driving position become common across both manufacturers. The Holdens were now able and required to use double-wishbone front suspension, similar to that of
9494-424: Was granted a new front and rear wing package. The BMWs were also allowed new splitters and full DTM-specification rear wings. Disparity between the Fords and Holdens continued to be a talking point during the next few years, with various concessions given to each manufacturer to try to equalise the two cars. From 1995 , the 2.0-litre cars, now contesting their own series as super touring cars , became ineligible for
9595-452: Was intended to be a precursor to the series holding a championship event at the circuit in 2016, in a push from CEO James Warburton to build series exposure in Asia. The event was later cancelled due to legal issues affecting the circuit. In December 2014, Supercars released details concerning the future of the category. New regulations, dubbed Gen2 Supercar, were introduced in 2017 to allow
9696-517: Was introduced in an effort to improve the environmental image of the sport. Carbon dioxide emissions decreased by up to 50%, but fuel consumption was increased by 30% to produce the same power as before. 2009 also had the introduction of a soft compound tyre at certain events to try to improve the quality of the racing and create different strategies. In 2005, AVESCO changed its name to V8 Supercars Australia (VESA). The series continued to expand during this time, with races held outside of Australasia for
9797-414: Was organised by V8 Supercars to investigate future directions for the sport. The project had the primary objective of cutting costs to $ 250,000 per car through the use of control parts and to create a pathway for new manufacturers to enter the series, provided that they have a four-door saloon car in mass production. The new formula, called "Car of the Future", was scheduled to be introduced before or during
9898-452: Was replaced by a privately funded Aston Martin Vantage program that did not last beyond the 2019 season. For the 2019 season, major technical changes occurred. Turbochargers were reintroduced in accordance with new regulations impacting engines and power outputs, as all cars are now required to have 2.0-litre 4-cylinder single turbo engines, replacing the 4.0L V8s that had been used since
9999-643: Was reviewed In April 2016, the series reached an agreement with Virgin Australia to rename the series to the Virgin Australia Supercars Championship on 1 July. For the 2021 season, this changed to the Repco Supercars Championship on a 5-year deal, extended to an 8-year deal at the end of 2022. After being first announced in 2020, and after being delayed for a year due to the COVID-19 pandemic,
10100-490: Was solely responsible for the administration of the category. The new board of directors was composed of four TEGA representatives, two members from SEL and two independent directors. In 2011, TEGA and SEL entered a sale agreement with Australian Motor Racing Partners (AMRP), which had significant financial backing from Archer Capital . This agreement saw SEL lose its 25% stake in V8 Supercars, with Archer Capital taking up
10201-553: Was the best touring car championship in the world, and many champions of that era now race in the World Touring Car Championship (WTCC). Between 2002 and 2006 the BTCC ran its own Touring class with Super Production/Super 2000 cars making up the numbers; the Touring class was phased out (only privateers are eligible to run old Touring cars) with the intention of a pure Super 2000 series. The introduction of
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