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74-566: The track hosts the IndyCar Series , Formula E , ICSCC and SCCA and OMRRA road racing, the NASCAR Xfinity Series and ARCA Menards Series West , and SCCA autocross events. Additionally, the PIR grounds are host to OBRA (Oregon Bicycle Racing Association) bicycling races on the track and the surrounding grounds. The facility includes a dragstrip and a motocross track. The road course

148-414: A consortium of ethanol producers that advocate the increased use of ethanol . EPIC was anxious to address public concerns of that era that ethanol use led to engine damage and poor performance when used in road cars. As a marketing effort, it was believed that sponsoring an IndyCar could be used as a tool to promote education and awareness of ethanol use and to curb the spread of erroneous information. Dana

222-406: A first-ever Dallara DW12 facelift. The kits, while increasing speeds and offering a clear distinction between the two manufacturers, did lead to significant cost increases. Further, Chevrolet's aero kit was the more dominant with Honda only able to mount a competitive charge on ovals due to having slightly better engine power. While Honda was able to make gains in 2016, after two years of development

296-612: A foot protection bulkhead, and cockpit padding. From the 2020 season onwards, the IndyCar Series implemented a cockpit protection system. This consists of a combination of the Halo mandated in Formula One and a reinforced windscreen dubbed the "aeroscreen", provided by Red Bull Advanced Technologies, to lessen the probability of traumatic head injuries from flying debris. All IndyCar Series cars carry an Electronic Control Unit. Live telemetry

370-429: A pneumatic clutch with semi-automatic activation, supplied by Xtrac Limited since the 2008 season. All current IndyCar transmissions use pneumatic actuation for the shifting and clutch, so the clutch is therefore only needed for launching the car from a standstill, and the clutch isn't required for gear shifting. From 1996 to 2007, all IndyCar Series cars used a hand-shifted 6-speed sequential manual transmission with

444-578: A practice crash. Riley & Scott produced IndyCar chassis from 1997 to 2000. Their initial effort, the Mark V, was introduced late in the 1997 season, severely limiting its potential market. It also proved to be uncompetitive. After Riley & Scott was purchased by Reynard, an all-new model, the Mark VII, was introduced for the 2000 season. It won in Phoenix, the second race of the season (driven by Buddy Lazier), but

518-478: A race weekend is 0:55.760 seconds, set by Wayne Taylor on the old circuit layout, in an Intrepid RM-1 - Chevrolet , during qualifying for the 1991 G.I. Joe's/Camel Grand Prix Presented by Nissan . As of August 2024, the fastest official race lap records at Portland International Raceway are listed as: 40% of races at the Portland International Raceway use leaded gasoline . The urban location of

592-599: A railroad berm broke and water from the Columbia River flooded the city. After the flood, all that remained were the paved streets and concrete foundations of destroyed buildings. The first races took place on these old city streets in 1961 during the Portland Rose Festival . Since then, the Rose Cup has become an annual event. Racing at "West Delta Park", as PIR was known back then, was quite dangerous. Racers leaving

666-583: A road course race, it was the all-time closest finish in CART series history, as well as the closest three-car finish in series history. In 1999 and 2000, the NASCAR Craftsman Truck Series ran a race at Portland International Raceway. The race was added after the demise of the ½-mile Portland Speedway that hosted races early in the series. The 1999 running saw the first (and as of 2021, the only) time there were more than one African-Americans competing in

740-501: A shift stick lever, supplied also by Xtrac since 2000 season until 2007. The clutches of all IndyCar Series cars are carbon with steel housing 3-plate clutch operated by foot-pedal in 1996–2011 later hand-paddle steering wheel clutch in 2012–present and provided by AP Racing . Mechanical limited-slip differentials are also allowed and constant velocity joint tripod driveshafts are also used. All IndyCar Series car drivetrains are currently rear mid-engine with rear-wheel-drive layout . Since

814-538: A single set of specifications is used, based upon the configuration and speed of the track, as well as having the right rear tire diameter constructed to be slightly larger than the left rear, (also known as stagger) to aid in high speed cornering. The suspension of all IndyCar Series cars is double A-arm, pushrod, with third spring and anti-roll bar configuration multilink. All NTT IndyCar Series cars use carbon-fiber shell driver's seats with 6-point safety restraints. The cars' steering wheels are designed by Cosworth with

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888-556: A system of buttons that allow the drivers to make adjustments to their cars mid-race. All IndyCar Series cars were equipped with Pi Research Sigma Wheel to Display data display units from 2001–2017 until they were replaced by Cosworth's Configurable Display Unit 4.3 display from 2018 onwards (although in 2018 some smaller low-budget IndyCar Series teams still utilized old Pi Research Sigma Wheel instead of new Cosworth Configurable Display Unit 4.3 due to cost reasons). The cockpits of all IndyCar Series cars are still open but protected by zylon,

962-568: A universal bodywork kit. Digital renderings for the common bodywork kit, referred to as the 'IR18' car, were released in early May 2017 as a second facelift of Dallara DW12 . The car was officially unveiled in late July, and the universal aero kit became known as the UAK18 bodywork. The bodywork is inspired by CART 's 1990s and 2000s designs, with a more streamlined appearance. The redesigned aero kit reduces both aerodynamic downforce and team and manufacturer design development costs. The universal Aero Kit

1036-458: A well-funded team, was brought on to develop the engine with team owner Eddie Cheever expanding the team to two cars and bringing on his brother Ross Cheever as a test driver. By 2000, the engine had improved markedly and Cheever captured the marque's first win at Pikes Peak International Raceway . However, despite the improved success, few teams made the switch to the Infiniti and the company left

1110-435: Is almost perfectly flat and runs clockwise. Two track configurations are possible. The modern Grand Prix circuit includes a hard chicane at the end of the front straight, referred to as the "Shelton Chicane" in honor of Vanport racing legend Monte Shelton , and involves 12 turns at a length of 1.967 mi (3.166 km). Without the chicane, the track has nine turns and a lap length of 1.915 mi (3.082 km). Portland

1184-410: Is classified as an FIA Grade Two circuit. PIR boasts a Winners' List starring some of the most accomplished open-wheel drivers of all time including Mario Andretti (1985–1986), Emerson Fittipaldi (1989), Michael Andretti (1990–1992), Bobby Rahal (1987), Sébastien Bourdais (2004, 2007), Will Power (2019, 2024), and Álex Palou (2021, 2023). The City of Portland is working to establish

1258-772: Is used only for television broadcasts, but the data can be recorded from the ECU to the computer if the car is in the garage tents and not on the track. Since 2007 McLaren supplied its Engine Control Unit (ECU) system for few IndyCar Series teams and later promoted to standard Engine Control Unit (ECU) systems from 2010 season onwards. Previously Motorola supplied IndyCar Series ECU in 2003–2009 for Honda -powered cars, also Denso supplied IndyCar Series ECU in 2003–2005 for Toyota -powered cars and also Zytek supplied IndyCar Series ECU in 2002–2005 for Chevrolet -powered cars. Rearview mirrors for all IndyCar Series cars are fully mandated to easily enable viewing opponents behind. At its inception,

1332-699: The Brazilian Stock Car championship in 1979. He moved to Britain in 1980 to race in Formula Ford 1600 and in 1981 entered Formula 3 and finished third in the championship. In November 1981 he tested for McLaren and entered the March team, only to switch in 1983 to Ligier. At the end of the year he went to the United States to race in CART . In 1987 he switched to World Sportscar Championship with Jaguar and won

1406-570: The CART chassis and turbocharged engines that had been the mainstay of the Indianapolis 500 since the late 1970s. Starting with the 2003 season, the series rules were changed to require chassis manufacturers to be approved by the league before they could build cars. Prior to that, any interested party could build a car, provided it met the rules and was made available to customers at the league-mandated price. In total, four manufacturers have built IndyCar chassis. Dallara began producing Indycars for

1480-488: The Firestone Indy Lights machines. After the withdrawal of factory support from Panoz Auto Development , they are the only supplier of new chassis. The G Force chassis was introduced in 1997 and won the 1997 and 2000 Indy 500 races. In 2002, Élan Motorsport Technologies bought G Force, and the chassis was renamed "Panoz G Force", and then shortened to "Panoz" in 2005. In 2003 a new model was introduced, and it won

1554-646: The Indy 500 . His last race in CART was at the 1999 Marlboro 500 at Fontana. Autódromo Internacional de Curitiba , a racing circuit in Curitiba, is officially nicknamed "Circuito Raul Boesel" (Raul Boesel circuit) in honour of his success in Europe. Boesel ended his professional racing career in 2005 after returning to Stock Car Brasil , although he still competes in some races after his retirement. Afterwards, he often comments about various racing categories. In 2007, he started

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1628-583: The Oldsmobile Aurora label) and Nissan (badged as Infiniti). Per IRL rules, the engines sold for no more than $ 80,000 (with an exception of full-works IndyCar Series teams that usually received free engines due to direct partnership with an each engine manufacturer), and were rev-limited to over 10,000 rpm and weighed up to 280  lb (127  kg ) (excl. headers, clutch, ECU, spark box or filters). They produced around 600–700 hp (450–520 kW). These engines utilized 90° crankshafts , and while

1702-526: The Sports Car Club of America , which was won by John Greenwood , driving a Chevrolet Corvette . Greenwood would go on to win the 1975 Trans-Am Series Championship. Beginning in 1984, Portland International began hosting the cars and stars of the PPG Indycar World Series , with Al Unser Jr. taking his first win, driving a Cosworth powered March . Portland is best-remembered as being

1776-568: The 1988 24 Hours of Daytona . Raul Boesel was born on 4 December 1957 in Curitiba, Brazil as the son of Jorny and Elizadea de Mesquita Boesel. Boesel had a brief career in equestrian show jumping winning state championships and other competitions. Since 1988, he resides in Key Biscayne, Florida with his wife Vera and children Raul Boesel Jr and Gabriela. He owns a Cigarette 38 Top Gun boat. He studied engineering, gave up his degree and went on to motor racing. He entered into first ever season of

1850-465: The 1997 season. The Dallara and G Force chassis were relatively evenly matched over their first few seasons, but eventually, the Dallara began to win more races. This caused more teams to switch to the Dallara, further increasing their success. As of 2017, a Dallara chassis has been used by 17 Indy 500 winners, although there have not been any competing manufacturers since 2008. Dallara was also tapped to build

1924-507: The 2008 Toyota Grand Prix of Long Beach . In 2010, IndyCar announced that it would officially adopt a single-make chassis formula, beginning in 2012 among a selection of proposals from interested parties, and set up the ICONIC (Innovative, Competitive, Open-Wheel, New, Industry-Relevant, Cost-Effective) Advisory Committee to make a final recommendation. Proposals were submitted and announced by BAT Engineering, Dallara , Lola , Swift , as well as

1998-564: The 2010 full season, cost $ 935,000 U.S. per season, per car. Raul Boesel Raul de Mesquita Boesel ( Portuguese pronunciation: [ʁaˈuw boˈɛzew] , born 4 December 1957) is a Brazilian former racing driver who raced for the March and Ligier Formula One teams and later raced in Champ Car and the Indy Racing League . He won the 1987 World Sportscar Championship and

2072-504: The IRL used methanol racing fuel, which had been the de facto standard in American open-wheel racing since the 1964 Indianapolis 500 Eddie Sachs – Dave MacDonald crash. Methanol had long provided a safer alternative to gasoline. It had a higher flash point, was easily extinguishable with water, and burned invisible. With the IRL's introduction of night races in 1997, the burning of methanol fuel

2146-560: The IRL, a major point of contention for CART management, to whom Ford-Cosworth was an official engine supplier. The Ilmor Mercedes V-8 engine, also a mainstay CART powerplant, was permitted, but the only time it was used as a one-off at the 1996 Indy 500 by Galles Racing . Starting in 1997, IRL cars were powered by 4.0-litre V8 , four-stroke piston, Otto cycle methanol -burning, production prototype-based, naturally-aspirated internal combustion engines and electronic indirect multi-point port fuel injection, produced by General Motors (under

2220-832: The Indianapolis 500 and the series title. However, Toyota had just one podium in the last seven races of 2004, and only Penske Racing fielded competitive Toyota-powered cars in 2005, while Honda became the dominant engine manufacturer within the series. In November 2005, Toyota company officials announced the company's withdrawal from American open-wheel racing and the immediate discontinuation of its IRL program, coinciding with its entrance into NASCAR's Craftsman Truck Series in 2004, and its discontinuation of its IMSA program. After Chevrolet and Toyota elected to shut down their IRL involvement after 2005 season ( Chevrolet temporarily hiatus from IndyCar Series for six years while Toyota USA elected to focus on NASCAR involvement), Honda became

2294-546: The Indy 500 in 2003–2004 and finished second in 2005. It fell out of favor starting in 2006, and by then, only one had finished in the top ten at Indy. Little factory support was given to IndyCar teams by Panoz after that point, as they had concentrated on their DP01 chassis for the rival Champ Car World Series. By 2008, only one Panoz saw track time, an aborted second-weekend effort at Indy, that resulted in Phil Giebler being injured in

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2368-508: The IndyCar Series merged with CART's successor, the Champ Car World Series and the history and statistics of both series, as well as those from its predecessors, were unified. The series' premier event is the Indianapolis 500 , which was first held in 1911. Historically, open-wheel racing was the most popular form of U.S. motorsport nationwide. However, an acrimonious schism (often referred to by many as "The Split") in 1994 between

2442-485: The U.S. government's demand that the alcohol is unfit for human consumption and add visible color in case of fire. However, 2010 São Paulo Indy 300 , held in Brazil –outside of the U.S. regulations– utilized a full E100 mixture, the first instance in the sport. To compensate for the loss of power due to the use of ethanol, the displacement was increased back to 3.5 liters. Since ethanol gets better fuel mileage than methanol,

2516-474: The United States, which has been conducted under the auspices of various sanctioning bodies since 1920 after two initial attempts in 1905 and 1916. The series is self-sanctioned by its parent company, IndyCar, LLC ., which began in 1996 as the Indy Racing League (IRL) and was created by then Indianapolis Motor Speedway owner Tony George as a competitor to Championship Auto Racing Teams (CART). In 2008,

2590-495: The back straight. Formula One -style curbs were also installed on the track. The track reopened on February 23, 2008, with a ribbon cutting ceremony. In September 2018, the Grand Prix of Portland returned after an 11-year hiatus, now an IndyCar Series race. The qualifying record is 0:57.3467, set by Will Power during the 2018 Grand Prix of Portland . Will Power (2019, 2024) and Álex Palou (2021, 2023) have each won twice since

2664-488: The cars were unique, being designed specifically for oval racing; for example, the oil and cooling systems were asymmetrical to account for the pull of liquids to the right side of the cars. Later cars were designed to accommodate the added requirements of road racing. Because of a schedule conflict, the Champ Car World Series spec Panoz DP01 , with a Cosworth engine, was run in an IndyCar Series points event in

2738-564: The development work associated with them. However, after a series of safety concerns during practice for the 2015 Indianapolis 500 with the Chevrolet aero kit package, this did not come about. The 2017 season was the third and final year contested with the Chevrolet and Honda aero kits outfitted to the Dallara DW12 chassis. Beginning in 2018, all DW12 Safety Cell chassis have been fitted with

2812-492: The engine blocks were to be production-based, they were not "stock blocks" like the Buick or Menard engines of the 1980s and 1990s. They were purpose-built racing engines. The engine formula was changed with the 2000–2004 formula. The displacement was dropped down from 4.0 to 3.5 litres (244 to 214 cubic inches ), and the requirement for the block to be production-based was dropped. The engines also switched to 180° crankshafts , and

2886-443: The engines were moderately de-tuned. The engines proved themselves to be quite durable — there had been no engine failures at Indy from 2006 to 2010, which also lowered the number of crashes. Most of the engines, including those used for the Indy 500, are used for multiple races and were intended to last 1,200 miles (1,931 kilometres ) between rebuilds. The Honda engines were only available via lease arrangement from Honda, which, for

2960-467: The existing engine blocks to curb top speeds (started from the 2004 Indianapolis 500 ). Infiniti's engines, though reliable, were significantly down on power compared to the Auroras in 1997, leading many of the teams that had initially opted for the Infiniti to switch. By the end of the 1998 season, only a handful of low-budget teams were using the Infiniti. However, early in the 1999 season, Cheever Racing ,

3034-451: The first time since 2011. The fuel cell for all current IndyCar Series cars are made of rubber and are covered with a Kevlar-fitted blanket for extra protection in side impacts. Since 2012 the capacity has been 18.5 US gallons (70 litres ). Previous capacities were 22 US gallons (83 litres ) in 2007–2011, 30 US gallons (114 litres ) in 2004–2006, and 35 US gallons (132 litres ) in 1997–2003. The initial 1996 IRL season, as well as

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3108-451: The first two races of the 1996–97 season, featured engines with specifications leftover from the rival CART series competition. Those chassis/engine combinations were essentially under the same rules utilized by teams that participated in the 1995 Indianapolis 500 , which was sanctioned by USAC. V-8 powerplants were allowed the typical 45 inHg (1.5 bar; 22.1 psi) of pressure boost. The Menard-Buick V6 engine used in 1996, however,

3182-425: The formation of IndyCar Series in 1996, the brake package for the IndyCar Series was slimmer carbon brake rotors with 4-pot brake calipers and carbon pads on all-oval races until 2011. The thicker steel brake rotors with 6-pot brake calipers and carbon pads were introduced in 2005 for road and street course races for stronger braking while approaching sharper turns even hairpins. From 2012 onwards, IndyCar Series ditched

3256-636: The front and 14 in × 15 in (356 mm × 381 mm) on the rear since 1996; this size will be used until at least the 2022 season. 18-inch wheel rims will be adopted if the Dallara DW12 's successor comes out for the 2023 season onward. Firestone has been a tire supplier for the series since the 1996 season and sole tire supplier since 2000 season. Previously, Goodyear also supplied tires from 1996 to 1999 for several teams before withdrawing their support. The IndyCar Series has run bespoke compounds since 1996 which were re-profiled in 2003. The front tire sizes are 305/45-R15 (10.0/25.8-R15) and

3330-453: The fuel tanks in the car were decreased. Compared to methanol, human contact with the current ICS fuel is much less harsh, and the fumes much less irritating. The fumes are often compared with the sweet smell of apple cider or apple cobbler. Unlike methanol, ethanol is not caustic and does not cause chemical burns when it comes in contact with the skin. It also is less polluting when spilled compared to methanol. In May 2010, Sunoco became

3404-469: The kits were frozen for 2017, and starting in 2018 all cars ran the same aero package again. To further help reduce costs, IndyCar allowed teams to shop for competitively priced non-safety-related parts such as brakes instead of mandating parts from specific suppliers. IndyCar had hoped to set a new speed record at the Indianapolis Motor Speedway by 2016 with the introduction of aero kits and

3478-518: The official fuel of the series starting in mid-2010 with an immediate effect, running through 2018. For the 2012 season, the ethanol fuel blend rate was reduced to 85% blend in a reference of road car relevance. Speedway LLC took over as series official fuel supplier beginning from 2019 season onwards, but the E85 formula still retained until at 2022. From 2023 onwards Shell USA (North American division of Shell plc ) will supply 100% Ethanol-sourced fuel for

3552-477: The only standard spec-engine manufacturer in the IndyCar Series starting in 2006 and continued in that capacity through 2011 as it was announced by Indy Racing League president & chief operating officer Brian Barnhart and Honda Performance Development president Robert Clarke on December 15, 2005. The IndyCar Series carried on with only one engine manufacturer in spite of the television agreement required at least two or three engine manufacturers to participate in

3626-467: The partial enclosure around the rear wheels, which acts to prevent cars ramping up over another vehicle's back end. This chassis was intended to support multiple aerodynamic kits, but introduction of these was delayed until 2015, with teams citing costs. After the events of the 2011 IZOD IndyCar World Championships the chassis was nicknamed DW12 in honor of Dan Wheldon . In 2015, teams began running aero kits developed by their engine manufacturers as

3700-528: The primary series, CART, and Tony George led to the formation of the Indy Racing League, which launched the rival IndyCar Series in 1996. From that point on, the popularity of open wheel racing in the U.S. declined dramatically. The feud was settled in 2008 with an agreement to merge the two series under the IndyCar banner, but enormous damage had already been done to the sport. Post-merger, IndyCar continues to run with slight viewership gains per year. For 1996–1997,

3774-475: The public its "Gen IV" motor, a rebadged Cosworth motor for competition. At the time, Cosworth was owned by Ford. On November 4, 2004, Chevrolet stated that it would be ending its IRL engine program effective with the end of the 2005 season, citing costs that exceeded value, according to then GM Racing Director Doug Duchardt, "The investment did not meet our objectives." Toyota won its first race in Miami, as well as

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3848-479: The race returned to the calendar. On September 29, 2021, it was announced that the NASCAR Xfinity Series would race there in the regular season. On December 8, 2022, it was announced that Formula E would race in there with a modified layout in the 2022–23 season instead of Brooklyn Street Circuit . Nick Cassidy won the inaugural Portland ePrix in June 2023. The unofficial outright all-time lap record set during

3922-479: The radical DeltaWing design that was penned by Ben Bowlby and financed by Chip Ganassi . In July 2010, IndyCar announced that Dallara had won the contract to remain as the series' single chassis supplier. In 2012 the series adopted the Dallara IR-12 chassis as a cost control method, and IndyCar negotiated a price of $ 349,000 per chassis. The new specification also improved safety, the most obvious feature being

3996-543: The rear tire sizes are 415/40-R15 (14.5/28.0-R15). The compounds and construction of IndyCar Series tires unique to each mounting position on the race car. For road/street events, there are unique primary and alternative specifications for dry conditions, along with specially designed full-rain tires for all rain conditions but, unlike in Formula One which has intermediate rain tires for light rain conditions only, no intermediate rain tires due to additional costs. For oval racing,

4070-422: The rev limits were adjusted from time to time. These engines made 675 hp (503 kW), ran on 109- octane methanol racing fuel, and revved to 10,300 rpm, all while weighing only 280 lb (130 kg). This formula was used through 2003. In 2004, in the wake of several crashes including the fatal crash of Tony Renna and the severe crash of Kenny Bräck , the displacement was reduced to 3.0-liters using

4144-448: The same NASCAR top-three division race, with Bill Lester and Bobby Norfleet on the grid. At the end of 2007 and the beginning of 2008, PIR went through a track renovation. The track was repaved with new asphalt and some minor changes were made to the track layout. Turns 4-7 were widened. The fence on the inside of turn 6 was moved to provide a better sightline through the corner. Turn 7 was sharpened to slow down racers prior to entering

4218-444: The same chassis. Currently, Dallara provides a specification chassis to all teams, with Honda and Chevrolet providing teams different engines. In the series' first season ( 1996 ), 1992 to 1995 model year CART chassis built by Lola and Reynard were used. The first new Indycar came into being in 1997. Tony George specified new technical rules for less expensive cars and production-based engines. The move effectively outlawed

4292-540: The series after the 2002 season to focus on powering the league's new Infiniti Pro Series (now Firestone Indy Lights). As part of General Motors' discontinuance of the Oldsmobile name, the Olds engine was rebadged as the Chevrolet starting with the 2002 season. However, the effort would lack in competitiveness against Toyota and Honda, which came to the IRL in 2003 from the rival CART series. In August 2003, Chevrolet announced to

4366-512: The series to ensure future continuity. The Honda Indy V8 engine was partnered and co-developed by Ilmor , which is part owned by Roger Penske for tune-up, engine maintenance, arrangement and trackside support. The engine displacement was reverted from 3.0 to 3.5 litres (183 to 214 cubic inches ) beginning from 2007 season. During that time, since the IndyCar Series had only one engine manufacturer, Honda focused on minimizing engine failure and minimizing costs instead of defeating rivals. As such,

4440-422: The series was now legally entitled to use it due to the expiration of a 1996 legal settlement with Championship Auto Racing Teams (CART). The series began to progressively downplay the former IRL name, changing its name to simply IndyCar for the 2008 season. The company was similarly renamed in 2011. Izod signed a six-year deal to become the series title sponsor beginning on November 5, 2009, through 2014, but

4514-553: The series was simply referred to as the Indy Racing League. For 1998–1999, the series garnered its first title sponsor, and was advertised as the Pep Boys Indy Racing League . In 2000, the series sold its naming rights to Internet search engine Northern Light , and the series was named the Indy Racing Northern Light Series . The name IndyCar Series was officially adopted beginning in 2003, as

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4588-496: The site of two of the closest finishes on a road course in Indy car racing history. In 1986, Michael Andretti lost fuel pressure on the final turn of the final lap, which allowed his father Mario to catch up and beat him to the finish line by 0.070 seconds. At the time, it was the closest finish of any race in Indy car history. In 1997, in a three-wide finish, Mark Blundell beat second place Gil de Ferran by 0.027 seconds, and beat third place Raul Boesel by 0.055 seconds. For

4662-515: The sponsorship was terminated at the end of the 2013 season. In 2014, Verizon Communications became title sponsor of the series through 2018. In January 2019, it was announced that Japanese communications company NTT would become title sponsor and official technology partner of the IndyCar Series. In 2023, IndyCar announced that NTT had extended their title sponsorship, for an unreported length. The IndyCar Series allows manufacturers to develop different types of engines, while every team uses

4736-737: The steel brake discs in favor of carbon brake rotors on all types of tracks but the caliper configuration remained the same as 1996–2011. PFC currently supplying brake packages for all IndyCar Series cars since 2017 season (disc only) and later increased their involvement from the 2018 season (supplying the calipers and rest of other brake packages). Previously Brembo supplied the brake packages in 2012–2016 (full brake package), 2017 (caliper only), and Alcon in 2003–2011. BBS and O.Z. Racing have been supplying forged wheels since 1996. The wheel rims for all IndyCar Series cars are made of aluminum alloy. The size of IndyCar Series wheel rims have been 10 in × 15 in (254 mm × 381 mm) on

4810-578: The title with five victories. In 1988 he won the 24 Hours of Daytona in a Jaguar XJR-9 , along with Martin Brundle and John Nielsen . That year he also returned to CART and finished third at Indianapolis in 1989. In 1991 he finished second in Le Mans 24 Hours with Jaguar and returned to CART, finishing fifth in the 1993 series, although never winning a race. He raced in CART until 1998, when he went to Indy Racing League . Because of this, he has multiple starts in

4884-478: The track and expenses from repairs. The "aeroscreen" cockpit protection was added in time for the 2020 season, and some minor modifications were eventually conducted to reduce the intense heat caused by stagnant air on the drivers. For the transmission gearboxes, all IndyCar Series cars currently use an electronically actuated AGS ( Assisted Gearchange System ) 6-speed semi-automatic sequential gearbox with an electro-pneumatically operated paddle-shift system and

4958-416: The track as carbon neutral . In 2023, an investigation revealed the use of leaded gasoline at the track, which poses significant health risks for spectators and residents near the track. This occurs primarily during drag races, as unleaded fuel (often alcohol based) is used in major weekends. PIR is built on the former location of Vanport, Oregon , which was destroyed on Memorial Day , May 30, 1948, when

5032-456: The track unexpectedly could collide with leftover concrete foundations or fall into ponds. Under the threat of losing the Rose Cup races, since many of the sanctioning racing bodies would no longer sanction races due to the deteriorating roads and dangerous obstacles, the track was finally paved in the 1970s. In 1975, Portland International hosted the Trans-Am Series , the premier series of

5106-601: The track, near the Portsmouth , Kenton and Piedmont neighborhoods of Portland, OR , has raised concerns about the potential for the Raceway to contribute to lead poisoning of nearby residents and a movement to end the use of leaded fuels at the Raceway. IndyCar Series The IndyCar Series , currently known as the NTT IndyCar Series under sponsorship , is the highest class of American open-wheel car racing in

5180-557: Was an updated powerplant from the 1995 version. In addition, the V-6 stock block engines (Buick-Menard) were allowed 55 inHg (1.9 bar; 27.0 psi) of boost at all races, instead of just at Indianapolis. During the CART era, V-6 stock blocks were only allowed 45 inHg (1.5 bar; 22.1 psi) at all races outside of Indy, which was a decided disadvantage and left the engine out of favor. Ford-Cosworth reluctantly provided support to teams wishing to run their older-spec engines in

5254-466: Was designed without the wheel guards of the DW12 chassis, which were deemed ineffective and proved prone to breaking. The IR-18 also lacks an air inlet above the cockpit, a first for an IndyCar Series chassis (most Champ Car chassis had been designed that way). The new Aero Kit also has fewer small aerodynamic pieces that can become broken or dislodged, with the intent to reduce the amount of debris that ends up on

5328-431: Was killed in a crash in 2006, but the IRL had already begun a transition to ethanol fuel . For the 2006 season the fuel was a 90%/10% mixture of methanol and ethanol . Starting in 2007, the league advertised " 100% Fuel Grade Ethanol ," the first competitive series to utilize renewable fuel. The mixture was actually 98% ethanol and 2% gasoline, provided by Lifeline Foods of Saint Joseph, Missouri . The additives satisfy

5402-495: Was off the pace at Indy and was quickly dropped by its teams. Falcon Cars were founded by Michael Kranefuss and Ken Anderson in 2002 as the third approved chassis supplier for the 2003 season. One rolling chassis was completed and shown, but it was never fitted with a working engine and never ran. No orders were ever filled. Superficially, IndyCar machines closely resemble those of other open-wheeled formula racing cars, with front and rear wings and prominent airboxes . Originally,

5476-460: Was visible for the first time, seen with a light blue haze. With this in mind, in an effort to make it more visible in case of fire during daylight hours, additional mixtures were placed in the fuel. As a safety feature, the methanol would burn with color. In 2005, the driver Paul Dana brought the sponsorship of the Ethanol Promotion and Information Council (EPIC) to his IndyCar team. EPIC is

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