PORSCHE RACING HISTORYBob Bergstrom (USA)
1983 : Portland 3 Hours - 2nd in class : Pocono 500 Miles - 2nd in class
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTO | Tom Winters (USA)/Bob Bergstrom (USA)/Peter Dawe (USA) | Whitehall Promotions (USA) | 45th | 22nd | 62nd | 193 laps - Engine |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTO | Tom Winters (USA)/Bob Bergstrom (USA)/Peter Dawe (USA) | Whitehall Promotions (USA) | 43rd | 19th | 44th | 148 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Tom Winters (USA)/Bob Bergstrom (USA) | Whitehall-Promotions Racing (USA) | 41st | 13th | 30th | 56 laps - DNF |
30 May 1983 - Lime Rock 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Tom Winters (USA)/Bob Bergstrom (USA) | Whitehall Promotions (USA) | 12th | 6th | 24th | 159 laps |
19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Bob Bergstrom (USA)/Tom Winters (USA) | Promotion-Whitehall (USA) | 49th | 22nd | 27th | 3 laps - DNF |
24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Tom Winters (USA)/Bob Bergstrom (USA) | Whitehall Promotions (USA) | 16th | 6th | 15th | 94 laps |
31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Tom Winters (USA)/Bob Bergstrom (USA) | Whitehall/Promotion (USA) | 7th | 2nd | 17th | 138 laps |
14 August 1983 - Mosport 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Bob Bergstrom (USA) | 25th | 10th | 14th | 63 laps - DNF |
11 September 1983 - Pocono 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 79 | Porsche 924 Carrera GTR | WP0ZZZ93ZBS720006 | GTU | Bob Bergstrom (USA)/Tom Winters (USA) | Whitehall/Promotion (USA) | 7th | 2nd | 18th | 162 laps |