| 9.1.2005 | Daytona Test | 21 | #02-015 | Gleason / James / Auberlen / Hand | Prototype Technology Group | 35th |
| 9.1.2005 | Daytona Test | 22 | #02-018 | Marks / Valentine / Milner / Collins | Prototype Technology Group | 41st |
| 25.1.2005 | Mil Milhas Brasileiras | 11 | | Wolff / Wendlinger / Zonca / Quester | | 6th |
| 6.2.2005 | 24 h Daytona | 21 | #02-015 | Auberlen / Hand / James / Gleason | Prototype Technology Group | 57th |
| 6.2.2005 | 24 h Daytona | 22 | #02-018 | Marks / Milner / Collins / Valentine | Prototype Technology Group | 59th |
| 5.3.2005 | 250 mile Homestead | 16 | #02-017 | Marks / Milner | Prototype Technology Group | 37th |
| 5.3.2005 | 250 mile Homestead | 17 | #02-041 | Valentine / Collins | Prototype Technology Group | 39th |
| 5.3.2005 | 250 mile Homestead | 21 | #02-015 | Hand / Auberlen | Prototype Technology Group | 24th |
| 5.3.2005 | 250 mile Homestead | 22 | #02-018 | Gleason | Prototype Technology Group | 45th |
| 27.3.2005 | Belcar Zolder NRF | 75 | | De Keersmaecker / Smets | Geerts Roel | DNS |
| 27.3.2005 | Belcar Zolder NRF | 96 | | Meijers / Tieman | Meijers Motorsport | 26th |
| 3.4.2005 | 400 km Fontana | 16 | #02-017 | Milner / Marks | Prototype Technology Group | 24th |
| 3.4.2005 | 400 km Fontana | 17 | #02-041 | Valentine / Collins | Prototype Technology Group | 29th |
| 3.4.2005 | 400 km Fontana | 21 | #02-015 | Auberlen / Hand | Prototype Technology Group | 17th |
| 3.4.2005 | 400 km Fontana | 22 | #02-018 | Gleason / James | Prototype Technology Group | 23rd |
| 17.4.2005 | Belcar Spa 1000 km | 75 | | De Keersmaecker / Smets | Geerts Roel | 16th/25th |
| 17.4.2005 | Belcar Spa 1000 km | 92 | | de Hoen / Essers | Brother Racing | 43rd/43rd |
| 1.5.2005 | 250 mile Laguna Seca | 16 | #02-017 | Milner / Marks / Auberlen | Prototype Technology Group | 23rd |
| 1.5.2005 | 250 mile Laguna Seca | 17 | #02-041 | Collins / Valentine | Prototype Technology Group | 24th |
| 1.5.2005 | 250 mile Laguna Seca | 21 | #02-015 | Auberlen / Hand | Prototype Technology Group | DNS |
| 1.5.2005 | 250 mile Laguna Seca | 22 | #02-018 | James / Gleason / Hand | Prototype Technology Group | 25th |
| 8.5.2005 | 24 h Nürburgring | 74 | | Müller / Abels / Herter / Gassen | AEZ Leichtmetallräder | DNF |
| 21.5.2005 | 6 h Mont-Tremblant | 16 | #02-017 | Hand / Milner / Marks | Prototype Technology Group | 15th |
| 21.5.2005 | 6 h Mont-Tremblant | 17 | #02-015 | Collins / Valentine | Prototype Technology Group | DNA |
| 21.5.2005 | 6 h Mont-Tremblant | 21 | #02-041 | Collins / Valentine / Auberlen | Prototype Technology Group | 33rd |
| 21.5.2005 | 6 h Mont-Tremblant | 22 | #02-018 | James / Hand | Prototype Technology Group | 13th |
| 11.6.2005 | Belcar Spa SER | 75 | | Smets / Kenis / Cuyvers | Geerts Roel | DNF |
| 11.6.2005 | Belcar Spa SER | 77 | | Alessi / Ravasio / Canali | - | NC |
| 11.6.2005 | Belcar Spa SER | 78 | | de Megni / Marini / Cioci | - | 17th |
| 11.6.2005 | Belcar Spa SER | 92 | | de Hoen / Essers / Grouwels | Brother Racing | 24th |
| 12.6.2005 | 6 h Watkins Glen | 16 | #02-017 | Milner / Marks | Prototype Technology Group | 17th |
| 12.6.2005 | 6 h Watkins Glen | 17 | #02-041 | Valentine / Collins | Prototype Technology Group | DNA |
| 12.6.2005 | 6 h Watkins Glen | 21 | #02-015 | Auberlen / Collins / Hand | Prototype Technology Group | 27th |
| 12.6.2005 | 6 h Watkins Glen | 22 | #02-018 | James / Gleason / Said | Prototype Technology Group | 24th |
| 26.6.2005 | Belcar Brands Hatch | 75 | | De Keersmaecker / Smets | | DNS |
| 26.6.2005 | Belcar Brands Hatch | 92 | | de Hoen / Essers | Brother Racing | 29th |