PORSCHE RACING HISTORYJohnny Dumfries (GB)
1987 : Brands Hatch 1000 km - 2nd overall : Road America 500 Miles - 1st overall : Columbus 300 km - 3rd overall
28 June 1987 - Norisring 200 Mile - World Sports-Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 31 | Porsche 962 C | 962C-112 | C1 | Jochen Dauer (D)/Johnny Dumfries (GB) | Victor-Dauer Racing (D) | DNF | 13th | 75 laps - Engine |
26 July 1987 - Brands Hatch 1000 km - World Sports-Prototype Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 C GTi | 962GTi-106B | C1 | Mauro Baldi (I)/Johnny Dumfries (GB) | Liqui Moly Equipe (GB) | 2nd | 2nd | 3rd | 238 laps |
16 August 1987 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 962 | 962-122A | GTP | Price Cobb (USA)/Johnny Dumfries (GB) | Dyson Racing (USA) | 1st | 1st | 6th | 81 laps |
6 September 1987 - San Antonio 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 962 | 962-122A | GTP | Price Cobb (USA)/Johnny Dumfries (GB) | Dyson Racing (USA) | 10th | 6th | 2nd | 108 laps - DNF |
4 October 1987 - Columbus 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 18 | Porsche 962 | 962-120 | GTP | Price Cobb (USA)/Johnny Dumfries (GB) | Dyson Racing (USA) | 3rd | 3rd | 2nd | 80 laps |
4 October 1987 - Columbus 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 962 | 962-122A | GTP | Rob Dyson (USA)/Johnny Dumfries (GB) | Dyson Racing (USA) | 7th | 7th | 8th | 76 laps - DNF |