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List of USAC Championship Car seasons
List of USAC Championship Car seasons
List of USAC Championship Car seasons
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A. J. Foyt driving a Championship Car in 1984

From 1956 to 1978, the United States Auto Club (USAC) sanctioned Championship Car class featured the top teams and drivers in U.S. open-wheel racing. Until 1971, races included road courses, ovals, dirt courses, and, on occasion, a hill climb. Thereafter, the schedule consisted mainly of paved ovals. In 1979, the majority of car owners left the USAC to race under the auspices of Championship Auto Racing Teams (CART). This led to a decline in the number of events in the schedule, and by the 1984–85 season, the Championship comprised only one race, the Indianapolis 500. The era of USAC Championship Cars concluded with the formation of the Indy Racing League (IRL) in 1995, which was sanctioned by USAC until June 1997 when the IRL assumed officiating duties after the controversial finish of the 81st Indianapolis 500 and a scoring mistake that marred the following event.[1] The most successful driver in USAC Championship Car history was A. J. Foyt with seven National Championships and four Indianapolis 500 victories. Foyt competed in every season from 1957 to 1992–93.

Seasons

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USAC Championship Trail

[edit]
# Season Races National Champion Indianapolis 500 Drivers Ref
Dirt Oval Hill Climb Paved Oval Road Total Ranked Fatalities
1 1956 8 (1) (1) 4 (1) - 12 (3) United States Jimmy Bryan United States Pat Flaherty 36 - [2][3]
2 1957 9 (1) (1) 4 (3) - 13 (5) United States Jimmy Bryan United States Sam Hanks 41 1 [4][5]
3 1958 8 (1) (1) 5 (3) - 13 (5) United States Tony Bettenhausen United States Jimmy Bryan 38 3 [6][7]
4 1959 7 (1) (1) 6 (1) - 13 (3) United States Rodger Ward United States Rodger Ward 50 7 [8][9]
5 1960 7 (1) (1) 5 - 12 (2) United States A. J. Foyt United States Jim Rathmann 45 1 [10][11]
6 1961 7 (1) 5 - 12 (1) United States A. J. Foyt United States A. J. Foyt 43 2 [12][13]
7 1962 7 (1) 6 - 13 (1) United States Rodger Ward United States Rodger Ward 39 1 [14][15]
8 1963 6 (1) 6 - 12 (1) United States A. J. Foyt United States Parnelli Jones 36 - [16][17]
9 1964 5 (1) 8 - 13 (1) United States A. J. Foyt United States A. J. Foyt 46 4 [18][19]
10 1965 4 1 12 1 18 United States Mario Andretti United Kingdom Jim Clark 57 - [20][21]
11 1966 4 1 10 1 (1) 16 (1) United States Mario Andretti United Kingdom Graham Hill 57 1 [22][23]
12 1967 4 1 10 6 21 United States A. J. Foyt United States A. J. Foyt 62 - [24][25]
13 1968 5 1 13 9 28 United States Bobby Unser United States Bobby Unser 68 2 [26][27]
14 1969 5 1 10 8 24 United States Mario Andretti United States Mario Andretti 72 - [28][29]
15 1970 5 (1) 10 3 18 (1) United States Al Unser United States Al Unser 55 - [30][31]
16 1971 - - 12 - 12 United States Joe Leonard United States Al Unser 44 - [32][33]
17 1972 - - 10 - 10 United States Joe Leonard United States Mark Donohue 42 1 [34][35]
18 1973 - - 16 - 16 United States Roger McCluskey United States Gordon Johncock 36 3 [36][37]
19 1974 - - 14 - 14 United States Bobby Unser United States Johnny Rutherford 37 - [38][39]
20 1975 - - 13 - 13 United States A. J. Foyt United States Bobby Unser 38 - [40][41]
21 1976 - - 13 - 13 United States Gordon Johncock United States Johnny Rutherford 39 - [42][43]
22 1977 - - 13 1 14 United States Tom Sneva United States A. J. Foyt 41 - [44][45]
23 1978 - - 15 3 18 United States Tom Sneva United States Al Unser 45 - [46][47]
24 1979 - - 7 - 7 United States A. J. Foyt United States Rick Mears 32 - [48][49]

Championship Racing League (CRL)

[edit]
# Season Races National Champion Indianapolis 500 Drivers Ref
Paved Oval Road Total Ranked Fatalities
25 1980 4 1 5 United States Johnny Rutherford United States Johnny Rutherford 57 - [50][51]

USAC Gold Crown Championship

[edit]
# Season Races National Champion Indianapolis 500 Drivers Ref
Dirt Oval Paved Oval Total Ranked Fatalities
26 1981–82 3 3 6 United States George Snider United States Bobby Unser* 51 1 [52][53]
United States Gordon Johncock*
27 1982–83 3 1 4 United States Tom Sneva 39 - [54][55]
28 1983–84 1 1 2 United States Rick Mears 39 - [56][57]
29 1984–85 - 1 1 United States Danny Sullivan 32 - [58]
30 1985–86 - 1 1 United States Bobby Rahal 33 - [59]
31 1986–87 - 1 1 United States Al Unser 33 - [60]
32 1987–88 - 1 1 United States Rick Mears 33 - [61]
33 1988–89 - 1 1 Brazil Emerson Fittipaldi 33 - [62]
34 1989–90 - 1 1 Netherlands Arie Luyendyk 33 - [63]
35 1990–91 - 1 1 United States Rick Mears 33 - [64]
36 1991–92 - 1 1 United States Al Unser Jr. 33 1 [65]
37 1992–93 - 1 1 Brazil Emerson Fittipaldi 33 - [66]
38 1993–94 - 1 1 United States Al Unser Jr. 33 - [67]
39 1994–95 - 1 1 Canada Jacques Villeneuve 33 - [68]

* The 1981–82 season included both the 65th and 66th Indianapolis 500 races.
( ) Figures in parentheses denote the number of non-championship races in that season.

References

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See also

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

List of USAC Championship Car seasons

View on Grokipedia
from Grokipedia
The List of USAC Championship Car seasons chronicles the annual competitions of the Auto Club's (USAC) premier open-wheel racing series, from its founding in through its transition to a single-race format by 1995. Established in the wake of the American Automobile Association's withdrawal from motorsport sanctioning following the , USAC assumed responsibility for the National Championship Trail, a points-based series that determined the top driver in U.S. open-wheel racing. Seasons typically comprised 10 to 28 events on a mix of oval, road, and dirt tracks, with the serving as the marquee race and awarding significant championship points. The series fostered technological advancements, including the shift to rear-engine cars in the early and the introduction of turbocharged engines in the 1970s, while crowning legends like , who secured a record seven titles between 1960 and 1979. A pivotal schism occurred in 1979, when dissatisfied team owners and sponsors formed the rival (CART), prompting USAC to operate a reduced schedule of just seven races that year. In response, USAC rebranded its top division as the Gold Crown Series starting in 1981, but participation dwindled amid the CART-USAC split, leading to schedules shrinking to as few as two events in the 1983–84 season. From 1985 onward, the series effectively became a one-race championship centered exclusively on the , which USAC continued to officiate until 1997, marking the end of its involvement in top-tier Indy car racing. This list encapsulates the era's competitive dynamics, driver achievements, and the broader transformation of American motorsport from a unified to fragmented professional circuits.

Historical Context

Formation and Early Years (1956–1960)

The (USAC) was established in 1956 as the new sanctioning body for American open-wheel racing after the (AAA) withdrew from oversight amid heightened liability concerns following the catastrophic 1955 disaster, which killed over 80 spectators and a driver. This shift was compounded by fatal accidents at the 1955 , including the deaths of Manny Ayulo in practice and in the race, prompting USAC's formation under the leadership of Indianapolis Motor Speedway owner Tony Hulman to restore stability and prioritize safety enhancements such as improved track barriers and driver protective gear in response to the era's high-risk environment. The inaugural USAC National Championship season in 1956 featured 12 races across a diverse array of venues, including dirt ovals like Langhorne Speedway, paved ovals such as the , and the Auto Hill Climb as a road course element. secured the first title with 1,860 points from four victories in 11 starts, driving the Dean Van Lines Special, while Pat Flaherty won the prestigious . The points system awarded 400 points to winners of standard 100- or 200-mile events, with deductions for lower finishes (e.g., 300 for second, 250 for third), scaled by race distance; the 500-mile carried triple points to reflect its significance, totaling 1,200 for the winner. Early seasons evolved with the inclusion of road racing components, as USAC sanctioned its first such events in 1958 at circuits like Lime Rock Park, Marlboro Motor Raceway, and Watkins Glen, establishing a short-lived USAC Road Racing Championship through 1962 that integrated with the oval-focused National Championship Trail until fuller separation in 1971. Seasons from 1956 to 1960 typically comprised 12 to 13 races, blending dirt and paved ovals with occasional hill climbs, and saw dominant performances from drivers like Jimmy Bryan, who repeated as champion in 1957, Tony Bettenhausen in 1958, Rodger Ward in 1959, and A.J. Foyt in 1960. These years laid the groundwork for USAC's structure, emphasizing the Indianapolis 500's central role while addressing safety amid ongoing fatalities that underscored the sport's perilous nature.

Expansion and Challenges (1961–1979)

The USAC Championship Car series experienced significant expansion during the 1960s and 1970s, with the number of races growing from 12 in 1961 to a peak of 18 in 1972, incorporating a broader variety of venues including more paved ovals and hill climbs such as Pikes Peak. This growth reflected the series' increasing popularity and efforts to diversify the schedule, moving beyond traditional dirt tracks to attract larger audiences and sponsorships. In 1971, the series underwent a temporary rebranding as the Marlboro Championship Trail under a $500,000 sponsorship from Marlboro cigarettes, which funded a 21-race slate focused primarily on paved ovals and marked a deliberate shift away from road courses following the 1970 season to align with sponsor preferences and reduce logistical complexities. Technological advancements reshaped the series, beginning with the introduction of rear-engine cars shortly after the 1961 , where Jack Brabham's ninth-place finish in a Cooper-Climax highlighted the potential of the design despite initial skepticism. By 1963, Lotus-Ford rear-engine entries, driven by and , challenged the dominant front-engine roadsters, leading to full adoption by 1965 when rear-engine cars filled nearly the entire field at Indy. Experimental engines emerged in 1968, with Andy Granatelli's , driven by Joe Leonard, taking pole at 171.559 mph, while Carroll Shelby's entries were withdrawn before the race—but reliability issues and USAC's subsequent restrictions on air-intake size effectively banned them after that season to preserve competitive balance and safety. The period was not without major challenges, including driver boycotts in 1971 over inadequate prize money and participation disputes, which saw stars like and skip events such as the season-opening race in despite the new sponsorship. Safety concerns intensified following the tragic , where a lap-2 crash killed rookies Dave MacDonald and in a fiery multi-car wreck, prompting USAC to mandate for its less visible flame and reduce fuel tank capacities to mitigate fire risks in future races. Amid these tensions, dominant figures like secured multiple championships in 1961, 1963, 1964, 1967, and 1975, exemplifying the era's intensity. International participation also grew, with drivers such as , , and entering USAC events, broadening the series' global appeal through occasional international races and European technology influences.

Decline and Reorganization (1980–1995)

The dissatisfaction among pavement racing teams with USAC's governance culminated in the formation of (CART) in late 1979, as prominent owners sought greater control over rules, scheduling, and purse distribution. This led to a significant exodus of top teams and drivers from USAC's trail. To bridge the divide, USAC and CART formed the Championship Racing League (CRL) in 1980 as a co-sanctioned entity, but the arrangement collapsed after just five races when the expressed dissatisfaction and USAC withdrew, allowing CART to proceed independently as the dominant pavement series. In response to the split, USAC reorganized its premier series under the new Gold Crown Championship banner starting in 1981, adopting a dual format that combined dirt and pavement events to broaden appeal and retain participants. The inaugural season featured six races, including prominent dirt tracks like DuQuoin State Fairgrounds, where secured victory in a dirt championship car, highlighting USAC's return to mixed-surface racing after a decade-long absence from dirt in national titles. However, CART's growing dominance on pavement ovals drew away elite talent and sponsorship, causing USAC's pavement schedule to shrink rapidly. By 1984, the pavement component had largely eroded, with the 1983 Pocono 500—won by —serving as the final non-Indy pavement event under USAC sanctioning. Thereafter, USAC pivoted to sanctioning the as a standalone spectacle from 1985 to 1996, awarding points toward CART's overall standings while maintaining administrative oversight of the event. The Gold Crown persisted on dirt tracks through 1995, with seasons limited to 1–6 races annually, emphasizing USAC's shift toward regional dirt open-wheel competition. This era marked USAC's transition from national prominence to a niche role, culminating in 1996 when the newly formed Indy Racing League assumed sanctioning of the , severing USAC's ties to major Indy car events. USAC's legacy endured in dirt racing, sustaining series like the Silver Crown that preserved open-wheel traditions on non-pavement circuits.

Season Summaries

USAC Championship Trail Seasons (1956–1979)

The USAC Championship Trail seasons, spanning 1956 to 1979, formed the backbone of American open-wheel racing under the United States Auto Club (USAC), emphasizing a national tour that blended traditional dirt ovals with emerging paved circuits and the iconic Indianapolis 500. This era saw evolving race formats, with early years focusing on shorter dirt events and later seasons incorporating longer paved ovals and brief experiments with road courses, such as the single road race in 1971. The schedule varied significantly, from as few as 7 races in 1979 amid internal challenges to peaks of 28 in 1968, reflecting the series' growth and logistical demands. The points system from 1956 to 1970 awarded points to the top 12 finishers based on race distance, promoting consistency across diverse event lengths: winners received 1000 points at the 500-mile (with 800 for second, 700 for third, and descending to 50 for 12th), 400 points for 200-mile races (300 for second, 250 for third, down to 30 for 12th), and 200 points for 100-mile races (150 for second, 125 for third, down to 15 for 12th). From 1971 to 1977, the structure remained largely unchanged despite increased race counts, allowing champions like to accumulate high totals through multiple victories; adjustments in 1978 extended points to all finishers to encourage broader participation. In 1971, Marlboro's sponsorship introduced significant branding to the series. Fatalities were a tragic aspect, with notable clusters like the three in 1958 (Pat O'Connor at , Art Bisch at Lakewood, Jimmy Reece at Trenton), underscoring safety concerns that persisted across the era.
SeasonRaces (Dirt Oval / Paved Oval / Road / Hill Climb)National Champion (Points)Indianapolis 500 WinnerNumber of Drivers RankedFatalitiesReferences
195612 (8 / 4 / 0 / 0) (1860)Pat Flaherty380http://www.champcarstats.com/year/1956.htm https://www.racing-reference.info/season-stats/1956/UO
195713 (9 / 4 / 0 / 0) (1930)Sam Hanks351 (Keith Andrews)http://www.champcarstats.com/year/1957.htm https://www.racing-reference.info/season-stats/1957/UO
195813 (8 / 5 / 0 / 0) (1945)323 (Pat O'Connor, Art Bisch, Jimmy Reece)http://www.champcarstats.com/year/1958.htm https://www.racing-reference.info/season-stats/1958/UO
195913 (7 / 6 / 0 / 0) (1960)301 (Jerry Unser)http://www.champcarstats.com/year/1959.htm https://www.racing-reference.info/season-stats/1959/UO
196012 (6 / 6 / 0 / 0) (1500)Jim Rathmann281 ()http://www.champcarstats.com/year/1960.htm https://www.racing-reference.info/season-stats/1960/UO
196112 (5 / 7 / 0 / 0) (1700)291 ()http://www.champcarstats.com/year/1961.htm https://www.racing-reference.info/season-stats/1961/UO
196213 (6 / 7 / 0 / 0) (1875)310http://www.champcarstats.com/year/1962.htm https://www.racing-reference.info/season-stats/1962/UO
196312 (5 / 7 / 0 / 0) (2170)270http://www.champcarstats.com/year/1963.htm https://www.racing-reference.info/season-stats/1963/UO
196413 (6 / 7 / 0 / 0) (2450)263 (Eddie Sachs, Dave MacDonald, Bill Horstmeyer)http://www.champcarstats.com/year/1964.htm https://www.racing-reference.info/season-stats/1964/UO http://www.motorsportmemorial.org/focus.php?db=ct&n=159
196518 (10 / 8 / 0 / 0) (2860)420http://www.champcarstats.com/year/1965.htm https://www.racing-reference.info/season-stats/1965/UO
196616 (8 / 8 / 0 / 0) (3060)381 (Chuck Rodee)http://www.champcarstats.com/year/1966.htm https://www.racing-reference.info/season-stats/1966/UO
196721 (12 / 9 / 0 / 0) (3350)450http://www.champcarstats.com/year/1967.htm https://www.racing-reference.info/season-stats/1967/UO
196828 (18 / 10 / 0 / 0) (4235)522 (Mike Spence, Ronnie Duman)http://www.champcarstats.com/year/1968.htm https://www.racing-reference.info/season-stats/1968/UO
196924 (14 / 10 / 0 / 0) (3430)480http://www.champcarstats.com/year/1969.htm https://www.racing-reference.info/season-stats/1969/UO
197018 (9 / 9 / 0 / 0) (3435)400http://www.champcarstats.com/year/1970.htm https://www.racing-reference.info/season-stats/1970/UO
197112 (5 / 6 / 1 / 0)Joe Leonard (2510)250http://www.champcarstats.com/year/1971.htm https://www.racing-reference.info/season-stats/1971/UO
197210 (4 / 6 / 0 / 0)Joe Leonard (1990)221 (Jim Malloy)http://www.champcarstats.com/year/1972.htm https://www.racing-reference.info/season-stats/1972/UO
197316 (7 / 9 / 0 / 0)Roger McCluskey (3145)352 (, )http://www.champcarstats.com/year/1973.htm https://www.racing-reference.info/season-stats/1973/UO
197414 (6 / 8 / 0 / 0) (2940)301 ()http://www.champcarstats.com/year/1974.htm https://www.racing-reference.info/season-stats/1974/UO
197513 (5 / 8 / 0 / 0) (2990)280http://www.champcarstats.com/year/1975.htm https://www.racing-reference.info/season-stats/1975/UO
197613 (4 / 9 / 0 / 0) (2010)260http://www.champcarstats.com/year/1976.htm https://www.racing-reference.info/season-stats/1976/UO
197714 (0 / 13 / 1 / 0) (3965)400http://www.champcarstats.com/year/1977.htm https://www.racing-reference.info/season-stats/1977/UO
197818 (3 / 15 / 0 / 0) (4325)450http://www.champcarstats.com/year/1978.htm https://www.racing-reference.info/season-stats/1978/UO
19797 (0 / 7 / 0 / 0) (3320)200http://www.champcarstats.com/year/1979.htm https://www.racing-reference.info/season-stats/1979/UO https://www.driverdb.com/championships/usac-national-championship/1979

Championship Racing League Season (1980)

The Championship Racing League (CRL) was established in early as a collaborative effort between the (USAC) and (CART) to resolve ongoing tensions from the previous year's schism, where pavement-focused teams had broken away from USAC due to its emphasis on dirt track events. Announced on , 1980, the CRL aimed to create a unified 12-race national championship with a board largely controlled by car owners, combining USAC's officiating expertise and event portfolio with CART's prominent drivers and teams. However, opposition from (IMS) management, who rejected the owner-dominated structure, led to USAC's withdrawal after just five races, causing the league to dissolve. The points system mirrored USAC's format, awarding 500 points for a win, 400 for second, and decreasing thereafter, with bonuses for leading laps and qualifying well. The CRL season consisted of five events, featuring four paved oval races and one road course, contested primarily by top pavement specialists in ground-effects chassis like the Chaparral 2K. Key races included the Datsun Twin 200s at on April 13 (won by ), the on May 26 (also won by Rutherford in a dominant leading 118 laps), the Gould Rex Mays Classic at on June 8 (won by ), the True Value 500 at on June 22 (won by Rutherford), and the Red Roof Inns 150 at on July 13 (won by ). Rutherford's three victories and two pole positions propelled him to the CRL with 2740 points, ahead of (2100 points) and Tom Sneva (1600 points), while also securing the victory—the only driver to achieve a dual CRL-Indy triumph that year. A total of 57 drivers competed across the events, reflecting broad participation despite the league's brevity. No fatalities occurred during the season. Following USAC's exit, the remaining seven races proceeded under sanctioning, but the CRL's collapse marked the end of formal unification attempts, with USAC recognizing Rutherford as its national champion based solely on the five joint events. This outcome solidified 's position as the primary series for pavement racing, while USAC shifted to a diminished role focused on select events, effectively concluding the era of a single body. Rutherford's CRL title was later acknowledged in official records as the USAC champion for the year.
SeasonRacesNational ChampionIndianapolis 500 WinnerNumber of Drivers RankedFatalitiesReferences
19805 (4 Paved Oval, 1 Road) (2740 points)570Champ Car Stats, The Third Turn, IndyCar Historical Record

USAC Gold Crown Championship Seasons (1981–1995)

The USAC Gold Crown Championship, launched in amid the ongoing in American open-wheel , reoriented USAC's premier series toward competitions while preserving its traditional sanctioning of the as a prestigious paved event. This era reflected USAC's adaptation to reduced participation from top teams, which had largely migrated to CART, by integrating track events from the parallel Silver Crown series into the Gold Crown schedule for the first four seasons. The hybrid format allowed for separate recognition of and pavement performances, with points awarded based on finishing position and distance—typically 500 points for a win adjusted by mileage factors to suit shorter schedules. Over 15 seasons, the series experienced a marked contraction, dropping from six events in to a single race (the ) by 1985, as USAC prioritized financial viability and its iconic role at the Brickyard. The dirt emphasis persisted through the affiliated Silver Crown division, which ran independent multi-race schedules annually, culminating in champions like in 1991. Fatalities occurred in some seasons, including in 1982 and [Jovy Marcelo](/page/Jovy Marcelo) in 1992 during qualifying and practice. By the mid-1990s, the Gold Crown had evolved into a largely ceremonial title tied to Indianapolis performance, coexisting alongside CART's dominant pavement series.
SeasonRaces (Dirt Oval, Paved Oval)National Champion (Dirt/Pavement where applicable)Indianapolis 500 WinnerNumber of Drivers RankedFatalitiesReferences
19816 (3, 3)George Snider (overall) / Larry Rice (dirt)230https://www.racing-reference.info/season-stats/1981/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1981
19824 (3, 1)Tom Sneva (overall) / (dirt)201 ()https://www.racing-reference.info/season-stats/1982/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1982
19832 (1, 1) (overall) / (dirt)180https://www.racing-reference.info/season-stats/1983/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1983
19841 (0, 1) (pavement) / Dave Blaney (dirt)330https://www.racing-reference.info/yeardet/1984/UO http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1984
19851 (0, 1) (pavement) / Rickey Hood (dirt)330https://www.racing-reference.info/season-stats/1985/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1985
19861 (0, 1) (pavement) / Jack Hewitt (dirt)330https://www.racing-reference.info/season-stats/1986/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1986
19871 (0, 1) (pavement) / Jack Hewitt (dirt)330https://www.racing-reference.info/season-stats/1987/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1987
19881 (0, 1) (pavement) / Steve Butler (dirt)330https://www.racing-reference.info/season-stats/1988/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1988
19891 (0, 1) (pavement) / Chuck Gurney (dirt)330https://www.racing-reference.info/season-stats/1989/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1989
19901 (0, 1) (pavement) / Jimmy Sills (dirt)330https://www.racing-reference.info/season-stats/1990/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1990
19911 (0, 1) (pavement) / (dirt)330https://www.racing-reference.info/season-stats/1991/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1991
19921 (0, 1)Al Unser Jr. (pavement) / Steve Butler (dirt)Al Unser Jr.331 ()https://www.racing-reference.info/season-stats/1992/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1992
19931 (0, 1) (pavement) / (dirt)330https://www.racing-reference.info/season-stats/1993/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1993
19941 (0, 1)Al Unser Jr. (pavement) / Jimmy Sills (dirt)Al Unser Jr.330https://www.racing-reference.info/season-stats/1994/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1994
19951 (0, 1) (pavement) / (dirt)330https://www.racing-reference.info/season-stats/1995/UO/ http://www.autoracingrecords.com/schamps.php?srid=00076&schdid=a&schyr=1995

References

  1. https://www.racing-reference.info/aaa-usac-champ-car-series-page/
  2. https://www.paposseracing.com/history-of-the-usac/
  3. https://www.firstsuperspeedway.com/articles/tony-hulman-and-formation-usac
  4. https://www.racingarchives.org/tag/accus/
  5. https://fieldof33.com/2020/01/09/a-look-back-at-the-hulman-george-era-of-ims/
  6. http://www.champcarstats.com/year/1956.htm
  7. https://www.usacracing.com/hall-of-fame-inductees/jimmy-bryan
  8. https://www.paposseracing.com/united-states-auto-club-races-and-news/
  9. https://www.racingarchives.org/tag/usac/
  10. https://www.thethirdturn.com/wiki/USAC_Champ_Car_Series_Central
  11. https://www.vintagesprintcars.com/2018/08/19/marlboro-usac-the-one-that-got-away/
  12. https://www.nytimes.com/1970/11/15/archives/300000-marlboro-auto-slate-hits-paved-oval-trail-in-1971-motor.html
  13. https://www.gordonkirby.com/categories/columns/theway/2016/the_way_it_is_no530.html
  14. https://speedsport.com/more-racing/other-series/how-the-turbine-era-ended/
  15. https://racer.com/2021/02/28/retro-when-indycar-opened-its-season-in-argentina
  16. https://www.essentiallysports.com/motorsports-indycar-news-dark-indycar-history-1964s-tragic-indy-500-that-shocked-the-world/
  17. https://www.motorsportshalloffame.com/inductees/aj-foyt/
  18. https://www.caranddriver.com/features/a15133831/cart-vs-irl-who-won-the-war/
  19. https://www.planetf1.com/features/indycar-split-reunification-history-explained
  20. http://www.champcarstats.com/year/1977.htm
  21. https://www.indianapolismotorspeedway.com/events/indy500/history/historical-stats/race-stats/summaries/indianapolis-500-race-winners
  22. http://www.motorsportmemorial.org/focus.php?db=ct&n=159
  23. http://www.champcarstats.com/year/1980u.htm
  24. https://www.indycar.com/-/media/Files/2014/News/IndyCar_Historical_Record_Book_2015-All-Time-Champions.pdf
  25. http://www.champcarstats.com/points.htm
  26. https://www.usacracing.com/record-book
  27. https://www.autoracingrecords.com/series.php?srid=00076
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