2005 was the fifth consecutive year of the Grand American Road Racing’s Grand Am Cup Series for American and Foreign sports cars and sedans.

There was a significant restructuring of the classes in 2004. The season debuted with a single Grand Sport (GS) and Street Tuner (ST) class.

  • Grand Sport (GS): The quicker of the two classes - the group features the larger displacement engines as well as smaller four-cylinder motors with forced induction systems. The power-plants produce between 350 and 405-horsepower. Minimum weights range between 2,730 – 3,250-pounds, which is dependent on the motor configuration and displacement. The top speed for a Grand Sport car is approximately 160-mph. This class includes cars such as the Acura NSX, Cadillac CTS-V, BMW M3, Pontiac Firebird, Ford Mustang, Nissan 350Z and Porsche 996.
  • Sport Touring (ST): The smaller displacement cars compete in this class in which engines typically produce between 170 and 240-horsepower. The top speed of a Sport Touring car is approximately 135-mph. Popular vehicles found in this group are the Acura RSX-S, Mazda RX-8, BMW Z3, BMW 330i, Chevrolet Cobalt SS and Mini Cooper S.

The cars competing in the series are relatively unchanged from their road-going versions – modifications are mandated mainly for safety – roll cages, window nets, etc. They also used spec DOT-approved tires produced by Hoosier. Based on performance potential, the cars are placed in the Grand Sport or Sport Touring group.

The 2005 season consists of eleven race weekends and starts in February at Daytona International Speedway. New for this year is a Grand Sport only race in Santo Domingo. Returning to the United States, teams travel to California Speedway in early April. At the end of the month, the series competes at Mazda Raceway Laguna Seca. Then there is a trip to the East Coast for race weekends at Watkins Glen International, Mosport International Raceway, Barber Motorsports Park, Trois-Rivieres (which would hold events for the Grand Sport and Sport Touring classes) and Mid-Ohio Sports Car Course. The penultimate rounds take place at Phoenix International Raceway with the Twin 200s. The Grand Sport and Street Tuner teams will compete in separate races. While the finale is held in early October at Virginia International Raceway.

The Grand Prix de Trois-Rivieres was round seven for the Grand Am Cup Grand Sport competitors. Twenty-seven teams were scheduled to race on the ten-turn 1.521-mile street course.

The pole-sitter, Scott Maxwell driving the Multimatic Motorsports Ford Mustang GT, leads the field of twenty-seven Grand Sport competitors into Trois-Rivieres’ first corner. Next to Maxwell is the other front row starter, Justin Marks driving the Turner Motorsport BMW M3. Behind the two fastest qualifiers is Maxwell’s teammate in another Ford Mustang, Gunnar Jeannette and the BMW M3 of Joe Foster.
It was victory number three of the season for Justin Marks and Bill Auberlen. During qualifying, Marks was second fastest driving the Turner Motorsport BMW M3. At the start of the race, Marks dropped back to fourth place but worked his way back to second. On lap-32, he followed the leader into the pits and Auberlen exited first. He grabbed the top spot after all the teams had cycled through their stops and cruised to the victory.
Scott Maxwell grabbed his first Grand Am Cup pole position of the season and, in the process, set a new lap record. Sharing the No. 05 Ford Mustang GT with Maxwell was David Empringham. Maxwell led the first thirty-two-laps before pitting. During the stop, the door broke and Empringham lost two laps. During his stint, he got one of the laps back and a late-race pass on Charles Espenlaub gave the team a sixth-place finish.
Sharing the No. 28 Race Prep Motorsports Porsche 996 was Tim Gaffney and Spencer Pumpelly. In 2001, Pumpelly drove to a solo victory in the Grand Am Grand Touring class at Trois-Rivieres. To date, Gaffney’s best finish was fourth and for Pumpelly, it was a sixth place. The qualifying honours went to Pumpelly and he was seventh fastest. The pair delivered a solid performance and were rewarded with a runner-up finish.
Another group earning their best result of 2005 was the Power Racing Team. Gridded tenth for the start of the Trois-Rivieres 150 were the team’s drivers, Mike Keravich III and Owen Trinkler. To date, their best finish in the No. 7 BMW M3 was an eighth place. The crew implemented an excellent race strategy and drivers capitalized on errors made some of the faster qualifiers to capture the final position on the Grand Sport podium.
It was an early exit for the No. 13 Unitech Racing Nissan 350Z. In the previous round at Barber Motorsports Park, drivers, Blake Rosser and David Murry, were victorious. Entering the first turn on the opening of the Trois-Rivieres, there was contact. This incident resulted in the first of the day’s five full-course caution periods. Track crews were required to remove the damaged Nissan, which did not make it beyond corner one.
Last season, Powell Motorsport debuted the Cadillac CTS-V and it proved to be competitive in the hands of Devon Powell and Terry Borcheller – Borcheller finished second in the final standings. This year, Powell and his co-driver, Don Knowles, had been struggling since the Santo Dominican event. At the Trois-Rivieres, the Cadillac started eighth and at the end of the race, the duo was in fourth place.

1GSMarks / AuberlenBMW M3Turner Motorsport88
2GSGaffney / Pumpelly / PickettPorsche 996Race Prep Motorsports88
3GSKeravich III / TrinklerBMW M3Power Racing Team88
4GSPowell / KnowlesCadillac CTS-VPowell Motorsport88
5GSGue / JeannetteFord Mustang GTMultimatic Motorsports88
6GSEmpringham / MaxwellFord Mustang GTMultimatic Motorsports87
7GSFox / Espenlaub / GrandePorsche 996Knobel Racing87
8GSGuindon / CamirandCadillac CTS-VPowell Motorsport87
9GSEllis / BavaroPorsche 997Bodymotion Racing87
10GSJames / NastasiFord Mustang GTBlackforest Motorsports87
11GSMacleod / GorriaranNissan 350ZDWW/GorillaRacing.com87
12GSKrohn / JonssonPorsche 996Krohn Racing86
13GSDumoulin / DumoulinPorsche 996Knobel Racing86
14GSSahlen / NonnamakerPorsche 996Team Sahlen86
15GSGaffney / Lally / PickettPorsche 996Race Prep Motorsports85
16GSKapudija / PecorariMustang Cobra SVTRehagen Racing / Speedquest84
17GSThornton / RussellBMW M3Automatic Racing79
18GSKohler / SmithMustang SaleenTF Racing77
19GSNonnamaker / NonnamakerPorsche 996Team Sahlen77
20GSSkelton / FosterBMW M3Anchor Racing68
21GSEllis / RossiPorsche 996Knobel Racing64
22GSRiddle / WilsonBMW M3Automatic Racing60
23GSHainer / Hand / SaidBMW M3Anchor Racing48
24GSAlhadeff / SigalPorsche 996Fiorano Racing43
25GSFinlay / McDowellBMW M3Finlay Motorsports28
26GSMunson / SofronasBMW M3Anchor Racing3
27GSRosser / MurryNissan 350ZUnitech Racing0

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