PORSCHE RACING HISTORYBob Bergstrom (USA)
1977 : Road Atlanta 100 Miles - 2nd in class : Mid-America 100 Miles - 2nd in class
6 February 1977 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 01 | Porsche 911 S | GTU | Bob Bergstrom (USA)/Jim Cook (USA) | Sports Ltd. Racing (USA) | 54th | 13th | 42nd | 29 laps - DNF |
19 March 1977 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 01 | Porsche 911 S | GTU | Bob Bergstrom (USA)/Jim Cook (USA) | Sports Ltd. Racing (USA) | 18th | 6th | 29th | 183 laps |
17 April 1977 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 01 | Porsche 911 S | GTU | Bob Bergstrom (USA) | Sports Ltd. Racing (USA) | 13th | 2nd | 25th | 36 laps |
1 May 1977 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 01 | Porsche 911 S | GTU | Bob Bergstrom (USA) | Sports Ltd. Racing (USA) | 17th | 4th | 38th | 48 laps |
15 May 1977 - Mid-America 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 01 | Porsche 911 S | GTU | Bob Bergstrom (USA) | Sports Ltd. Racing (USA) | 9th | 2nd | 21st | 32 laps |