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The 2003 All Japan Grand Touring Car Championship was the eleventh season of Japan Automobile Federation GT premiere racing. It was marked as well as the twenty-first season of a JAF-sanctioned sports car racing championship dating back to the All Japan Sports Prototype Championship. The GT500 class champions of 2003 were the #23 Xanavi NISMO Nissan Skyline GT-R team driven by Satoshi Motoyama and Michael Krumm and the GT300 class champions were the #3 Hasemi Motorsports Nissan Fairlady Z driven by Masataka Yanagida and Mitsuhiro Kinoshita, neither of which had won a single race during the course of the season.
The 2003 season saw the introduction of a comprehensive overhaul of the series' vehicle regulations.[1][2] Manufacturers could now cut away the production vehicle's mainframe and replace the front and rear structures with pipe frame structures, which had also allowed for further suspension development.[2] The engine could now be mounted freely in any position or any orientation, and the transmission could now be mounted freely in any position, allowing for the introduction of transaxle units.[2] The size of the rear diffuser was reduced, and the underbody of the car had to be fitted with a flat bottom floor.[2]
Toyota had fitted their GT500 Supra with a 5.2 litre version of the naturally-aspirated 3UZ-FE V8 engine to replace the four-cylinder 3S-GTE. Honda retained the 3.5 litre C32B V6 engine, which was now mounted longitudinally behind the cockpit.[2] Nissan changed from the RB26DETT inline-six cylinder engine to the VQ30DETT V6 engine in the middle of 2002, and retained the lighter aluminium-block engine into 2003.
Round | Race | Circuit | Date |
---|---|---|---|
1 | GT Championship in TI | TI Circuit | March 30 |
2 | All Japan GT Fuji 500 | Fuji Speedway | May 4 |
3 | SUGO GT Championship | Sportsland SUGO | May 25 |
4 | Malaysian JGTC in Fuji Speedway | Fuji Speedway | July 13 |
5 | Japan Special GT Cup | Fuji Speedway | August 3 |
6 | Motegi GT Championship Race | Twin Ring Motegi | September 14 |
7 | Japan GT in Kyushu 300 km | Autopolis | October 26 |
8 | Suzuka GT 300 km | Suzuka Circuit | November 16 |
Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th |
---|---|---|---|---|---|---|---|---|---|---|
Points | 20 | 15 | 12 | 10 | 8 | 6 | 4 | 3 | 2 | 1 |
Qualifying | 1 | 1 | 1 | |||||||
Fastest Lap | 1 | 1 | 1 | |||||||
|
|
For teams that entered multiple cars, only the best result from each round counted towards the teams' championship.[5]
Rank | Team | No. | TAI |
FUJ |
SUG |
FUJ |
FUJ |
MOT |
AUT |
SUZ |
PTS |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | Nismo | 22 | 8 | 1 | 5 | 2 | 11 | 13 | 6 | 4 | 106 |
23 | 2 | 4 | 3 | 5 | 2 | 11 | 5 | 3 | |||
2 | Esso Toyota Team LeMans | 1 | 1 | 12 | 1 | 6 | 4 | 4 | 4 | 7 | 83 |
3 | Dome Racing Team | 16 | 8 | 1 | 10 | 11 | 77 | ||||
18 | 3 | Ret | 7 | 8 | 1 | 14 | Ret | 2 | |||
4 | Toyota Team TOM'S | 36 | 6 | 10 | 2 | 7 | 5 | 2 | 8 | 8 | 66 |
37 | Ret | 8 | 13 | 15 | 6 | 10 | 13 | 14 | |||
5 | Team Impul | 12 | 12 | 2 | Ret | 1 | 16 | 6 | 11 | 1 | 64 |
6 | Toyota Team SARD | 39 | 14 | 3 | 14 | 3 | 7 | 7 | 1 | 9 | 57 |
7 | Toyota Team Cerumo | 38 | DNS | DSQ | 10 | 4 | 3 | 9 | 3 | 13 | 46 |
8 | Mobil 1 Nakajima Racing | 64 | 5 | 6 | 8 | 13 | 9 | Ret | 2 | 12 | 36 |
9 | Team Kunimitsu with Mooncraft | 100 | 7 | 7 | 16 | 17 | 13 | 5 | 9 | 5 | 27 |
10 | Team Advan Tsuchiya | 25 | 10 | Ret | 4 | 14 | 17 | 3 | 12 | Ret | 35 |
11 | Kraft | 35 | 9 | 5 | 6 | 10 | 10 | 12 | 7 | 10 | 24 |
12 | Mugen | 16 | 4 | Ret | 9 | 12 | 13 | ||||
13 | Autobacs Racing Team Aguri | 8 | 11 | Ret | 11 | 11 | 12 | 8 | Ret | 6 | 9 |
14 | Hitotsuyama Racing | 76 | 13 | 9 | 12 | 18 | 14 | Ret | 15 | 2 | |
14 | R&D Sports | 62 | 11 | 15 | 9 | Ret | Ret | 16 | 2 | ||
- | JLOC | 88 | 15 | Ret | Ret | 16 | 15 | 15 | Ret | Ret | 0 |
Rank | Team | No. | TAI |
FUJ |
SUG |
FUJ |
FUJ |
MOT |
AUT |
SUZ |
PTS |
Rank | Drivers | Number/Team | Points | Wins |
---|---|---|---|---|
1 | Masataka Yanagida Mitsuhiro Kinoshita |
#3 Hasemi Motorsports Nissan Fairlady Z | 77 | 0 |
2 | Keita Sawa | #71 Sigmatech Toyota Celica | 72 | 2 |
3 | Shinichi Yamaji Kazuyuki Nishizawa |
#26 Advan Team Taisan Porsche 996 | 72 | 1 |
4 | Takayuki Aoki Minoru Tanaka |
#19 WedsSport Toyota Celica | 63 | 2 |
5 | Kota Sasaki Satoshi Goto |
#31 Team Reckless Toyota MR-S | 61 | 1 |
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