| 7.6.1998 | 24 h Le Mans | 8 | LMP1/98 | Weaver / Raphanel / Murry | Porsche AG | DNF |
| 7.6.1998 | 24 h Le Mans | 25 | 911 GT1-98 | Alzen / Wollek / Müller | Porsche AG | 2nd |
| 7.6.1998 | 24 h Le Mans | 26 | 911 GT1-98 | McNish / Ortelli / Aiello | Porsche AG | 1st |
| 7.6.1998 | 24 h Le Mans | 38 | 911 GT1-98 | Bartels / Hahne | Zakspeed Racing | DNPQ |
| 7.6.1998 | 24 h Le Mans | 39 | 911 GT1-98 | Delétraz / Giroix | Zakspeed Racing | DNPQ |
| 7.6.1998 | 24 h Le Mans | 47 | 911 GT1 | Rosenblad / Morelli / Goode | Millenium Motorsport | DNA |
| 7.6.1998 | 24 h Le Mans | 48 | 911 GT1 Evo | Jarier / Goueslard / Donovan | Larbre Competition | DNPQ |
| 7.6.1998 | 24 h Le Mans | 61 | 993 GT2 | Trunk / Palmberger / Müller | Krauss Race Sports International | DNF |
| 7.6.1998 | 24 h Le Mans | 63 | 993 GT2 | Erdos / MacQuillan | Gerard MacQuillan | DNPQ |
| 7.6.1998 | 24 h Le Mans | 64 | 993 GT2 | Hürtgen / Ligonnet / Nearn | Roock Racing Motorsport | 17th |
| 7.6.1998 | 24 h Le Mans | 65 | 993 GT2 | Ahrlé / Schirle / Warnock | Roock Racing | 22nd |
| 7.6.1998 | 24 h Le Mans | 66 | 993 GT2 R | Maassen / Price / Robinson | Roock Racing | DNPQ |
| 7.6.1998 | 24 h Le Mans | 67 | 993 GT2 R | Neugarten / Smadja / Lagniez | Elf Haberthur Racing | DNF |
| 7.6.1998 | 24 h Le Mans | 68 | 993 GT2 R | Maury-Laribiére / Graham / Poulain | Elf Haberthur Racing | 20th |
| 7.6.1998 | 24 h Le Mans | 69 | 993 GT2 | Nourry / Perrier / Ricci | Michel Nourry | 18th |
| 7.6.1998 | 24 h Le Mans | 70 | 993 GT2 | Konrad / Ham / Schumacher | Konrad Motorsport | DNF |
| 7.6.1998 | 24 h Le Mans | 71 | 993 GT2 R | Monteiro / Maisonneuve / Monteiro | Estoril Racing | DNF |
| 7.6.1998 | 24 h Le Mans | 72 | 993 GT2 R | Goueslard / Yver / Chéreau | Larbre Compétition | DNF |
| 7.6.1998 | 24 h Le Mans | 73 | 993 GT2 R | Seiler / Kitchak / Zadra | Konrad Motorsport | DNF |
| 7.6.1998 | 24 h Le Mans | | 911 GT1-98 | Basseng / Müller / Sospiri | Porsche AG | DNA |
| 14.6.1998 | British GT Snetterton | 0 | 911 GT1 | Greasley / Wallinder | Blue Coral/Slick 50/Quaker State | DNF |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 00 | 911 GT1 Evo | Klaus Bytzek | BMS Race Team | 1st |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 07 | 968 | Ludwig Heimrath | Heimrath Porsche Racing | 4th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 07 | 911 Carrera RSR | Law / Marshall | G & W Motorsports | 14th |
| 14.6.1998 | FFSA GT Charade | 1 | 993 GT2 | Goueslard / Sourd | Larbre Compétition | 1st/DNF |
| 14.6.1998 | Belcar Spa PT | 1 | 911 | Dupont / Taels | FINA - GLPK Racing | 45th |
| 14.6.1998 | Belcar Spa PT | 2 | 911 | Thiers / Vosse | FINA - GLPK Racing | 33rd |
| 14.6.1998 | FFSA GT Charade | 2 | 993 GT2 R | Jarier / Lafon | Sonauto-Levallois | 3rd/1st |
| 14.6.1998 | Belcar Spa PT | 3 | 993 | Vanierschot / Longin | AD Sport | DNS |
| 14.6.1998 | FFSA GT Charade | 4 | 993 GT2 | Roland Bervillé | Alméras Fréres | 4th/3rd |
| 14.6.1998 | Belcar Spa PT | 4 | 993 GT | Beilke / Althoff | | 8th |
| 14.6.1998 | Belcar Spa PT | 5 | 993 | Wauters / Wauters | AD Sport | 49th |
| 14.6.1998 | Belcar Spa PT | 6 | 911 | Bruynoghe / Kumpen | AD Sport | 7th |
| 14.6.1998 | FFSA GT Charade | 7 | 993 GT2 R | Malcher / Yver | Larbre Compétition | 2nd/2nd |
| 14.6.1998 | Belcar Spa PT | 8 | 993 | Van Vaerenbergh / Ramon | MRS - Janssen Jaak | 47th |
| 14.6.1998 | Belcar Spa PT | 9 | 993 | Huisman / Huisman | Van de Venne Geert | 4th |
| 14.6.1998 | British GT Snetterton | 9 | 993 GT1 | Masarati / Mortimer | RMA Driving Sensations | 14th |
| 14.6.1998 | Belcar Spa PT | 10 | 993 | Grootaers / Schreurs | Peka Racing | 13th |
| 14.6.1998 | Belcar Spa PT | 11 | 911 | Moonen / Bogemans | Peka Racing | 19th |
| 14.6.1998 | British GT Snetterton | 11 | 911 GT1 | Thyrring / Nielsen | Millennium Motorsport | DNA |
| 14.6.1998 | Belcar Spa PT | 15 | 993 Carrera RSR | Asselborn / Döring | Porsche-Zentrum-Rhein-Oberborg | 25th |
| 14.6.1998 | Belcar Spa PT | 16 | 993 | La Rosa / Daniels | AD Sport | 5th |
| 14.6.1998 | Belcar Spa PT | 17 | GT2 | Meers / Van Rossem | Uitgeerts Gerard | DNS |
| 14.6.1998 | Belcar Spa PT | 18 | 911 Carrera RSR | Kurris / Vetters | Renard Guy | 27th |
| 14.6.1998 | Belcar Spa PT | 20 | 993 Carrera RS | Philips / Vollebergh | Van Gucht Luc | DNS |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 21 | 911 | Collin / Ezell | Fabcar/Perfect Power | 19th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 23 | 993 Carrera RSR | Wagner / Havens | Alex Job Racing | 13th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 25 | 911 Carrera RSR | Kitch / White / Petersen | Alex Job Racing | 17th |
| 14.6.1998 | Belcar Spa PT | 29 | 911 | Verheyen / Penders | Gabriels Jan | 10th |
| 14.6.1998 | Belcar Spa PT | 30 | 911 | Sluyters / Buytaert | Theunissen Rob | 23rd |
| 14.6.1998 | Belcar Spa PT | 31 | 993 | Ménage / Schoonbroodt | Vaesen Raf | 6th |
| 14.6.1998 | British GT Snetterton | 33 | 993 GT2 R | Saunders / Saunders | Gaumont/Parr Motorsport | 8th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 38 | 911 GT1 Evo | Boutsen / Wollek | Champion Motors | 6th |
| 14.6.1998 | FFSA GT Charade | 38 | 993 Cup | Salles / Davy | Michel Nourry | 9th/6th |
| 14.6.1998 | FFSA GT Charade | 39 | 993 Carrera RSR | Sabatier / Rousseau | RS Racing Team | DNF/4th |
| 14.6.1998 | British GT Snetterton | 40 | 993 GT2 R | Day / Pickup | P K Sport | 7th |
| 14.6.1998 | Belcar Spa PT | 41 | 911 | Jegers / Daelemans | Maes Eddy | 41st |
| 14.6.1998 | British GT Snetterton | 42 | 993 GT2 | Konig / Fisken | P K Sport | 10th |
| 14.6.1998 | Belcar Spa PT | 45 | 964 | Bastiaens / Dujardyn | René Van Hove | 11th |
| 14.6.1998 | British GT Snetterton | 46 | 964 Carrera RSR 3.8 | Lucas / Osborne | P K Sport | DNF |
| 14.6.1998 | FFSA GT Charade | 49 | 993 Cup | Luis Marques | Estoril Racing Team | 5th/DNF |
| 14.6.1998 | British GT Snetterton | 50 | 993 GT2 R | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 6th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 52 | 911 Carrera RSR | Stitt / Russell | Team Protosport GT | 18th |
| 14.6.1998 | British GT Snetterton | 53 | 934 | Dave Welz | Dave Welz Racing | DNF |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 55 | 911 Carrera RSR | Ralston / Trejos | AASCO Performance | DNA |
| 14.6.1998 | British GT Snetterton | 58 | 993 GT2 | Wellings / Guest | Wellings/Guest | DNF |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 59 | 968 | Gord Cullen | Georgian Bay Motorsports | 20th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 86 | 993 Carrera RSR | Marshall / Fitzgerald | G & W Motorsports | 15th |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 91 | 993 GT2 Evo | Harry Bytzek | | 2nd |
| 14.6.1998 | Belcar Spa PT | 93 | 993 | Daems / Leinders | | 1st |
| 14.6.1998 | FFSA GT Charade | 94 | 944 Turbo Cup | Gallardo / Garcia | Pitline | DNF/12th |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 96 | 968 | Ray Arbesman | Heimrath Porsche Racing | 9th |
| 14.6.1998 | 2 h 30 min Mid-Ohio | 99 | 993 GT2 | Schumacher / Pilgrim | Schumacher Racing | 10th |
| 14.6.1998 | CDN GT Shannonville CRDA Shootout | 181 | 944 Turbo | Vito Scavone | | 17th |
| 14.6.1998 | 24 h Nürburgring | 210 | 968 RS | Brundza / Venkunas / Sinaska / Budrikis | | 31st |
| 21.6.1998 | 3 h 45 min Road Atlanta | 23 | 993 Carrera RSR | Wagner / Havens / Collins | Alex Job Racing | DNS |
| 21.6.1998 | 3 h 45 min Road Atlanta | 24 | 911 Carrera RSR | Refenning / Vargo / Vargo / Vargo | Tim Vargo | DNS |
| 21.6.1998 | 3 h 45 min Road Atlanta | 38 | 911 GT1 Evo | Boutsen / Wollek | Champion Motors | 3rd |
| 21.6.1998 | 3 h 45 min Road Atlanta | 41 | 993 Carrera RSR | Cervelli / Collins | Technodyne | DNA |
| 21.6.1998 | 3 h 45 min Road Atlanta | 48 | 993 | Finger / Green | John Finger | DNS |
| 21.6.1998 | 3 h 45 min Road Atlanta | 86 | 911 Carrera RSR | Wagner / Fitzgerald | G & W Motorsports | 18th |
| 21.6.1998 | 3 h 45 min Road Atlanta | 99 | 993 GT2 | O'Steen / Pilgrim / Schumacher | Schumacher Racing | 11th |
| 21.6.1998 | 2 h Zeltweg | | 993 Carrera RSR 3.8 | Hofer / Blieninger | | 2nd |
| 21.6.1998 | 2 h Zeltweg | | 911 Carrera RS | "Romoletto" / Daccò | | 1st |
| 21.6.1998 | 2 h Zeltweg | | Cup 3.6 | Luca Cattaneo | | 3rd |
| 27.6.1998 | Hi-Land GT Sendai | 9 | 993 Carrera RSR 3.8 | Hioki / Hane | Team Daikokuya | 24th |
| 27.6.1998 | Hi-Land GT Sendai | 10 | 993 GT2 | Asou / Ishikawa | Ability | 22nd |
| 27.6.1998 | Hi-Land GT Sendai | 30 | 993 GT2 | Yamada / Okada | Team Take One | 8th |
| 27.6.1998 | Hi-Land GT Sendai | 51 | 993 Carrera RSR 3.8 | Ishihara / Iketani | Cobra Racing Team | DNF |
| 27.6.1998 | Hi-Land GT Sendai | 70 | 993 GT2 | Ishibashi / van Schoote | Team Gaikokuya | DNF |
| 27.6.1998 | Hi-Land GT Sendai | 71 | 993 GT2 | Hoshino / Jounai | Sigmatec Racing Team | 19th |
| 27.6.1998 | Hi-Land GT Sendai | 910 | 993 Carrera RSR 3.8 | Yogo / Kobayashi | 910 Racing | 13th |
| 27.6.1998 | Hi-Land GT Sendai | 911 | 993 Carrera RSR 3.8 | Takahashi / Nakajima | 910 Racing | 21st |
| 28.6.1998 | 500 km Hockenheim | 5 | 911 GT1-98 | Grau / Scheld | Zakspeed Racing | DNF |
| 28.6.1998 | 500 km Hockenheim | 8 | 911 GT1-98 | Alzen / Müller | Porsche AG | 10th |
| 28.6.1998 | 500 km Hockenheim | 57 | 993 GT2 | Eichmann / Maassen | Roock Racing | 11th |
| 28.6.1998 | 500 km Hockenheim | 60 | 993 GT2 R | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 13th |
| 28.6.1998 | 500 km Hockenheim | 63 | 993 GT2 | Trunk / Müller | Krauss Race Sports International | 23rd |
| 28.6.1998 | 500 km Hockenheim | 69 | 993 GT2 | Vuillaume / Ried | Proton Competition | DNF |
| 28.6.1998 | 500 km Hockenheim | 75 | 993 GT2 | Schwach / Cohen-Olivar | Swiss Team Salamin | DNS |