PORSCHE RACING HISTORYPorsche 962 - Chassis No. 962-HR1
28 July 1985 - Portland 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 1st | 1st | 1st | 97 laps |
4 August 1985 - Sears Point 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 7th | 7th | 4th | 72 laps |
25 August 1985 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 26th | 11th | 5th | 96 laps - Valves |
8 September 1985 - Pocono 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 1st | 1st | 2nd | 124 laps |
29 September 1985 - Watkins Glen 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 1st | 1st | 3rd | 92 laps |
6 October 1985 - Columbus 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 22nd | 13th | 3rd | 51 laps - Drive Shaft |
1 December 1985 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Al Unser, Jr. (USA) | Holbert Racing (USA) | 1st | 1st | 3rd | 89 laps |
2 March 1986 - Miami Grand Prix - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 6th | 6th | 4th | 123 laps |
6 April 1986 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 3rd | 3rd | 2nd | 124 laps |
27 April 1986 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 28th | 7th | 4th | 137 laps - DNF |
4 May 1986 - Laguna Seca 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 4th | 4th | 2nd | 95 laps |
18 May 1986 - Charlotte 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 18th | 7th | 3rd | 39 laps - DNF |
26 May 1986 - Lime Rock 150 laps - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 1st | 1st | 5th | 150 laps |
8 June 1986 - Mid Ohio 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 1st | 1st | 2nd | 129 laps |
22 June 1986 - West Palm Beach 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 4th | 4th | 8th | 136 laps |
27 July 1986 - Portland 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 1st | 1st | 5th | 97 laps |
3 August 1986 - Sears Point 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 2nd | 2nd | 8th | 75 laps |
21 September 1986 - Watkins Glen 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 2nd | 2nd | 4th | 92 laps |
26 October 1986 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Derek Bell (GB) | Holbert Racing (USA) | 6th | 6th | 4th | 93 laps |
26 April 1987 - Riverside 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA)/Al Holbert (USA) | Holbert Racing (USA) | 2nd | 2nd | 3rd | 122 laps |
24 May 1987 - Lime Rock 150 laps - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA) | Holbert Racing (USA) | 18th | 7th | 1st | 122 laps - DNF |
7 June 1987 - Mid Ohio 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA)/Al Holbert (USA) | Holbert Racing (USA) | 4th | 4th | 2nd | 125 laps |
5 July 1987 - Watkins Glen 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA)/Al Holbert (USA) | Lowenbrau Special (USA) | 18th | 5th | 2nd | 78 laps - DNF |
26 July 1987 - Portland 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA) | Holbert Racing (USA) | 1st | 1st | 2nd | 97 laps |
16 August 1987 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 962 | 962-HR1 | GTP | Derek Bell (GB) | Holbert Racing (USA) | 4th | 4th | 5th | 81 laps |
6 September 1987 - San Antonio 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Derek Bell (GB)/Chip Robinson (USA)/Al Holbert (USA) | Holbert Racing (USA) | 1st | 1st | 3rd | 142 laps |
4 October 1987 - Columbus 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA) | Holbert Racing (USA) | 5th | 5th | 6th | 79 laps |
25 October 1987 - Del Mar 2 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA) | Holbert Racing (USA) | 23rd | 11th | 1st | 10 laps - DNF |
31 January 1988 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Al Holbert (USA)/Chip Robinson (USA)/Derek Bell (GB) | Holbert Racing (USA) | 7th | 7th | 8th | 660 laps |
28 February 1988 - Miami 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA)/Derek Bell (GB) | Holbert Racing (USA) | 4th | 4th | 4th | 124 laps |
19 March 1988 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 962 | 962-HR1 | GTP | Chip Robinson (USA)/Al Holbert (USA) | Holbert Racing (USA) | 46th | 10th | 1st | 142 laps - Engine |