The 2015

Pirelli World Challenge The GT World Challenge America is a North American auto racing series launched in 1990 by the Sports Car Club of America. It has been managed by the Stephane Ratel Organisation since 2018, and has been sanctioned by the United States Auto Club s ...

season was the 26th running of the

Sports Car Club of America The Sports Car Club of America (SCCA) is a non-profit American automobile club and sanctioning body supporting road racing, rallying, and autocross in the United States. Formed in 1944, it runs many programs for both amateur and professional r ...

's World Challenge series. It introduced a new all-Porsche "GT Cup" race group.

Johnny O'Connell Johnny O'Connell (born July 24, 1962) is the most successful GM factory racing driver from the United States. He currently drives for Cadillac in the Pirelli World Challenge, winning the 2012, 2013, 2014 and 2015 GT driver's championship. Caree ...

was the defending champion in the highest class, the GT class.

Schedule

The season comprises 12 rounds, with several rounds in support of the

IndyCar Series The IndyCar Series, currently known as the NTT IndyCar Series under sponsorship, is the highest class of regional North American open-wheel single-seater formula racing cars in the United States, which has been conducted under the auspices of ...

and the

United SportsCar Championship The IMSA SportsCar Championship, currently known as the IMSA WeatherTech SportsCar Championship under sponsorship, is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMS ...

, as well as supporting the

NASCAR Canadian Tire Series The NASCAR Pinty's Series (french: Série NASCAR Pinty's), commonly abbreviated as NPS, is a national NASCAR racing series in Canada, and is a continuation of the old CASCAR Super Series which was founded in 1981. History In September 2006 NASCAR ...

and the

NASCAR Xfinity Series The NASCAR Xfinity Series (NXS) is a stock car racing series organized by NASCAR. It is promoted as NASCAR's second-tier circuit to the organization's top level Cup Series. NXS events are frequently held as a support race on the day prior to a ...

. †The round at Long Beach was capped to 40 cars, with only 10 GT-Cup cars guaranteed a place. Any GT-Cup entries that were not able to contest the Long Beach round were eligible for double points at Barber Motorsports Park.

News

The second race at Belle Isle on May 31 was cancelled on safety grounds due to inclement weather, which caused reduced track visibility. An additional race was held at Road America to replace the round at Detroit.

Entry list

GT/GTA

GT Cup

Every driver participates in a

Porsche 911 GT3 Cup The Porsche 911 GT3 is a high-performance homologation model of the Porsche 911 sports car. It is a line of high-performance models, which began with the 1973 911 Carrera RS. The GT3 has had a successful racing career in the one-make national ...

GTS

TC/TCA/TCB

Race results

;Notes:

Championship standings

Drivers' Championships

Championship points were awarded to drivers based on qualifying and finishing positions. The driver had to complete at least 50% of the class winner's number of laps to receive points. The Pole position winner received 7 points. In addition, 1 bonus point was awarded to a driver leading a lap during a race, and 3 bonus points were awarded to the driver leading the most laps. The driver who set the fastest lap of the race received 1 bonus point.

GT

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

GTA

Michael Lewis Michael Monroe Lewis (born October 15, 1960) Gale Biography In Context. is an American author and financial journalist. He has also been a contributing editor to '' Vanity Fair'' since 2009, writing mostly on business, finance, and economics. H ...

ran in the GTA class during the first three events of the championship, but ran in the GT class from

Barber A barber is a person whose occupation is mainly to cut, dress, groom, style and shave men's and boys' hair or beards. A barber's place of work is known as a "barbershop" or a "barber's". Barbershops are also places of social interaction and publi ...

on. Bryan Heitkotter ran in the GTA class during the first eight events of the championship, but ran in the GT class from

Miller A miller is a person who operates a Gristmill, mill, a machine to grind a grain (for example corn or wheat) to make flour. Mill (grinding), Milling is among the oldest of human occupations. "Miller", "Milne" and other variants are common surname ...

on. Those who finished behind Lewis and Heitkotter in the GTA class in the first eight events did not get more points despite the fact that Lewis and Heitkotter have been removed from the GTA standings. ;Notes * Results denoted by † did not complete sufficient laps in order to score points.

GT Cup

Every driver competes in a

. ;Notes * Results denoted by † did not complete sufficient laps in order to score points.

GTS

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

TC

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

TCA

;Notes * Results denoted by † did not complete sufficient laps in order to score points. *¹ – Kris Wright was put in last place of the TCA class for an issue in post tech after Race 1 at Austin.

TCB

;Notes * Results denoted by † did not complete sufficient laps in order to score points. *¹ – Andrei Kisel was put in last place of the TCB class for driving conduct after Race 1 at Austin.

Manufacturers' Championships

Only those manufacturers who are SCCA Pro Racing corporate members were eligible to receive points toward the Manufacturers' Championship. Championship points were awarded to manufacturers based on qualifying and finishing positions. Only the highest finishing car of each eligible manufacturer earned points for its finishing position. The Pole position winner received 1 bonus point.

GT

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

GTS

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

TC

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

TCA

;Notes * Results denoted by † did not complete sufficient laps in order to score points.

References

{{Speed World Challenge years

GT World Challenge America