PORSCHE RACING HISTORYPorsche 935/79 - Chassis No. 930 990 0030
8 April 1979 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche Audi (USA) | 1st | 1st | 1st | 40 laps |
22 April 1979 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA)/Klaus Ludwig (D) | Brumos Porsche (USA) | 5th | 5th | 1st | 185 laps |
29 April 1979 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 1st | 1st | 2nd | 53 laps |
13 May 1979 - Hallett 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 2nd | 2nd | 1st | 55 laps |
28 May 1979 - Lime Rock 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 1st | 1st | 1st | 65 laps |
17 June 1979 - Brainerd 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 1st | 1st | 1st | 33 laps |
4 July 1979 - Daytona Paul Revere 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 3rd | 3rd | 1st | 63 laps |
15 July 1979 - Mid-Ohio 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA)/Hurley Haywood (USA) | Peter Gregg Racing (USA) | 1st | 1st | 1st | 104 laps |
21 July 1979 - Trans-Am Road America - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | TA-II | Peter Gregg (USA) | Bayside Disposal Racing, Inc. (USA) | 1st | 1st | 2nd | 25 laps |
29 July 1979 - Sears Point 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | 1st | 1st | 1st | 40 laps |
5 August 1979 - Portland 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | 1st | 1st | 1st | 51 laps |
23 September 1979 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Peter Gregg Racing (USA) | 1st | 1st | 1st | 40 laps |
25 November 1979 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA)/Hurley Haywood (USA) | 39th | 8th | 2nd | 33 laps |
3 February 1980 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA)/Hurley Haywood (USA)/Bruce Leven (USA) | Brumos Porsche Audi (USA) | 11th | 7th | 4th | 584 laps |
13 April 1980 - Road Atlanta 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | Brumos Porsche (USA) | 3rd | 3rd | 4th | 19 laps |
27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA)/Al Holbert (USA) | Brumos Porsche Audi (USA) | 54th | 17th | 3rd | 27 laps - Oil Pressure |
4 May 1980 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | 2nd | 2nd | 1st | 53 laps |
26 May 1980 - Lime Rock 1.5 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935/79 | 930 990 0030 | GTX | Peter Gregg (USA) | 14th | 8th | 1st | 60 laps - DNF |