PORSCHE RACING HISTORYJim Busby (USA)
1977 : Sebring 12 Hours - 3rd overall : Laguna Seca 100 Miles - 2nd overall
6 February 1977 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 934 | 930 670 0175 | GTO | Peter Gregg (USA)/Jim Busby (USA) | Brumos Racing (USA) | 10th | 5th | 7th | 590 laps (Wrong #?) |
19 March 1977 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 934/5 | 930 770 0951 | GTO | Jim Busby (USA)/Peter Gregg (USA) | Brumos Racing (USA) | 3rd | 3rd | 1st | 229 laps |
17 April 1977 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 934/5 | 930 770 0951 | GTO | Jim Busby (USA) | Jim Busby (USA) | 35th | 23rd | 31st | 4 laps - DNF |
1 May 1977 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 934/5 | 930 770 0951 | GTO | Jim Busby (USA) | Jim Busby Racing (USA) | 2nd | 2nd | 4th | 52 laps |
15 May 1977 - Mid-America 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 934/5 | 930 770 0951 | GTO | Jim Busby (USA) | Jim Busby (USA) | 25th | 14th | 3rd | 5 laps - DNF |
9 July 1977 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 935 | 930 770 0910 | Gr.5 | Jim Busby (USA)/Tom Frank (USA) | Jim Busby Racing (USA) | 12th | 10th | 7th | 156 laps |
20 August 1977 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 61 | Porsche 935 | 930 770 0910 | Gr.5 | Jim Busby (USA)/Eppie Wietzes (CDN) | Jim Busby Racing (USA) | 18th | 6th | 45 laps - Engine |