| 23.5.1998 | 4 h Misano | 6 | 993 GT2 | Mastropietro / Mastropietro / Padovani | Renato Mastroprieto | 3rd |
| 23.5.1998 | 6 h Misano | 6 | 993 GT2 | Mastropietro / Mastropietro / Padovani | Renato Mastroprieto | 2nd |
| 23.5.1998 | 6 h Misano | 11 | 964 Carrera RSR 3.8 | Cassina / Michelotti / Bocciardi | Matteo Cassina | 4th |
| 23.5.1998 | 6 h Misano | 12 | 964 Carrera RSR 3.8 | Haupt / Gottifredi / Biava | Claudio Haupt | 8th |
| 23.5.1998 | 4 h Misano | 12 | 964 Carrera RSR 3.8 | Haupt / Gottifredi / Biava | Claudio Haupt | 11th |
| 23.5.1998 | 6 h Misano | 14 | 993 Cup | Schmid / Villa / Pasquali | Riccardo Schmid | 5th |
| 23.5.1998 | 4 h Misano | 14 | 993 Cup | Schmid / Villa / Pasquali | Riccardo Schmid | 7th |
| 23.5.1998 | 6 h Misano | 15 | 911 Carrera Cup | Cattaneo / De Castro / Gianotti | Win Sport | 6th |
| 23.5.1998 | 4 h Misano | 16 | 911 Carrera RS | Viganó / Rosa / Rosa | Giovanni Vigano | 13th |
| 23.5.1998 | 6 h Misano | 16 | 911 Carrera RS | Viganó / Rosa / Rosa | Giovanni Vigano | 10th |
| 23.5.1998 | 4 h Misano | 19 | 911 Carrera Cup | Costacurta / Bellini | Walter Costacurta | 12th |
| 23.5.1998 | 6 h Misano | 19 | 911 Carrera Cup | Costacurta / Bellini | Walter Costacurta | 9th |
| 23.5.1998 | 4 h Misano | 28 | 993 GT2 R | Smith / Grassi / Ligonnet | Seikel Motorsport | 2nd |
| 23.5.1998 | 6 h Misano | 28 | 993 GT2 R | Smith / Grassi / Ligonnet | Seikel Motorsport | 1st |
| 23.5.1998 | 4 h Misano | 29 | 993 GT2 R | Monteiro / Monteiro | Estoril Racing Team | DNA |
| 23.5.1998 | 6 h Misano | 29 | 993 GT2 R | Monteiro / Monteiro | Estoril Racing Team | DNA |
| 23.5.1998 | 4 h Misano | 32 | 993 GT2 | Pagotto / Giribaldi | Luigino Pagotto | DNF |
| 23.5.1998 | 6 h Misano | 32 | 993 GT2 | Pagotto / Giribaldi | Luigino Pagotto | DNF |
| 23.5.1998 | 4 h Misano | 33 | 993 GT2 | Margueron / Cohen / Kumpen | GLPK Racing | 1st |
| 23.5.1998 | 6 h Misano | 33 | 993 GT2 | Margueron / Cohen / Kumpen | GLPK Racing | DNF |
| 23.5.1998 | 4 h Misano | 35 | 993 GT2 | Ligonnet / Kaufmann | Freisinger Motorsport | DNA |
| 23.5.1998 | 6 h Misano | 35 | 993 GT2 | Ligonnet / Kaufmann | Freisinger Motorsport | DNA |
| 23.5.1998 | 6 h Misano | 37 | 993 GT2 R | Buttiero / Sangiuolo | RWS Brun Motorsport | DNF |
| 23.5.1998 | 4 h Misano | 37 | 993 GT2 R | Buttiero / Sangiuolo | RWS Brun Motorsport | DNF |
| 23.5.1998 | 4 h Misano | 43 | 993 GT2 | Frigerio / Sabatini / Babini | Massimo Frigerio | DNA |
| 23.5.1998 | 6 h Misano | 43 | 993 GT2 | Frigerio / Sabatini / Babini | Massimo Frigerio | DNA |
| 23.5.1998 | 4 h Misano | 46 | 993 GT2 | | Konrad Motorsport | DNA |
| 23.5.1998 | 6 h Misano | 46 | 993 GT2 | | Konrad Motorsport | DNA |
| 23.5.1998 | 6 h Misano | 47 | 993 GT2 | MacQuillan / Erdos | Gerard MacQuillan | DNA |
| 23.5.1998 | 4 h Misano | 47 | 993 GT2 | MacQuillan / Erdos | Gerard MacQuillan | DNA |
| 23.5.1998 | 4 h Misano | 51 | 993 Cup | Blieninger / Riccitelli / Hofer | RWS Brun Motorsport | 5th |
| 23.5.1998 | 6 h Misano | 51 | 993 Cup | Blieninger / Riccitelli / Hofer | RWS Brun Motorsport | 3rd |
| 23.5.1998 | 6 h Misano | 76 | 993 Cup | Perrier / Ricci / Richard | Perspective Automobiles | 11th |
| 23.5.1998 | 4 h Misano | 76 | 993 Cup | Perrier / Ricci / Richard | Perspective Automobiles | 8th |
| 23.5.1998 | 4 h Misano | 77 | 993 Cup | Touroul / Ortion | Raymond Touroul | DNA |
| 23.5.1998 | 6 h Misano | 77 | 993 Cup | Touroul / Ortion | Raymond Touroul | DNA |
| 23.5.1998 | 4 h Misano | 78 | 993 Cup | Albouy / Peyroles | Pilotage Passion | DNA |
| 23.5.1998 | 6 h Misano | 78 | 993 Cup | Albouy / Peyroles | Pilotage Passion | DNA |
| 23.5.1998 | 6 h Misano | 81 | 993 Cup | Helmut Reis | Eco Tec | DNA |
| 23.5.1998 | 4 h Misano | 81 | 993 Cup | Helmut Reis | Eco Tec | DNA |
| 23.5.1998 | 4 h Misano | | 964 Carrera RSR 3.8 | Monforte / Monforte / Monforte | Giuseppe Monforte | DNA |
| 23.5.1998 | 6 h Misano | | 964 Carrera RSR 3.8 | Monforte / Monforte / Monforte | Giuseppe Monforte | DNA |
| 24.5.1998 | British GT Croft | 0 | 911 GT1 | Greasley / Wallinder | Blue Coral/Slick 50/Quaker State | 4th |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 00 | 911 GT1 Evo | Klaus Bytzek | BMS Race Team | 1st |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 07 | 968 | Ludwig Heimrath | Heimrath Porsche Racing | 23rd |
| 24.5.1998 | British GT Croft | 11 | 911 GT1 | Thyrring / Nielsen | Millennium Motorsport | 1st |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 15 | 911 | Blair Killoran | | 21st |
| 24.5.1998 | British GT Croft | 33 | 993 GT2 R | Saunders / Saunders | Gaumont/Parr Motorsport | 12th |
| 24.5.1998 | British GT Croft | 37 | 993 GT2 | Barrett / Lockie | The Premium Team - Carmichaels Motorsport | 14th |
| 24.5.1998 | British GT Croft | 40 | 993 GT2 R | Day / Astley | P K Sport | 9th |
| 24.5.1998 | British GT Croft | 42 | 993 GT2 | Konig / Fisken | P K Sport | 11th |
| 24.5.1998 | British GT Croft | 46 | 964 Carrera RSR 3.8 | Lucas / Osborne | P K Sport | DNA |
| 24.5.1998 | British GT Croft | 50 | 993 GT2 R | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 7th |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 88 | 944 Turbo | Bob Munro | | 11th |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 91 | 993 GT2 Evo | Harry Bytzek | | 3rd |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 96 | 968 | Ray Arbesman | Heimrath Porsche Racing | 29th |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 115 | 911 | John McAulay | | 14th |
| 24.5.1998 | CDN GT Mosport BEMC Spring | 174 | 911 | Ulrich Furtmair | | 15th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 00 | 993 Carrera RSR | Snyder / Friedman | David Friedman | 11th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 23 | 993 Carrera RSR | Wagner / Havens | Alex Job Racing | 8th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 24 | 911 Carrera RSR | Vargo / Refenning | Tim Vargo | 10th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 71 | 911 Carrera RSR | Pfeffer / Zimmerman | Gordon Zimmerman | 9th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 98 | 993 Carrera RSR | Pumpelly / Plumb | Chris Mitchum | 12th |
| 25.5.1998 | 1 h 45 min Lime Rock [GT] | 99 | 993 GT2 | Schumacher / Varde | Schumacher Racing | 6th |
| 31.5.1998 | SM GTR Gelleråsen | 2 | 993 Carrera RSR | Hubert Berg | Hubert Bergh | 1st/DNF |
| 31.5.1998 | SM GTR Gelleråsen | 3 | 993 Cup RS | Lennart Pehrson | Lennart Pehrson | 2nd/1st |
| 31.5.1998 | SM GTR Gelleråsen | 4 | Boxster 986 GTR | Henrik Roos | Jaan Tolli Motorsport JTI | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 6 | 964 | Anders Hammer | Porsche Sports Club | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 7 | 993 GT2 JPS | Bo Jonasson | Bosse Jonasson | 3rd/raced |
| 31.5.1998 | SM GTR Gelleråsen | 8 | 944 Turbo | Kenneth Olsson | Porsche Sports Club | raced/5th |
| 31.5.1998 | SM GTR Gelleråsen | 9 | 968 Turbo RS | Mark Miller | Jaan Tolli Motorsport JTI | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 11 | 944 Turbo | Martin Grosen | Martin Grosen | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 12 | 944 Turbo | Stefan Pfister | Stefan Pfister | 4th/2nd |
| 31.5.1998 | SM GTR Gelleråsen | 16 | 964 Carrera RSR | Claés Lund | Klaes Lund | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 19 | 968 | Johan Ling-Vannerus | Johan Ling-Vannerus | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 46 | 911 Carrera RSR | Peter Gutniak | Peter Gutnaik | 6th/4th |
| 31.5.1998 | SM GTR Gelleråsen | 69 | 911 Cup | Mikael Frisk | Mikael Frisk | raced/raced |
| 31.5.1998 | SM GTR Gelleråsen | 78 | 993 RS | Mikael Baalack | Sundstra Säteri | 5th/3rd |
| 7.6.1998 | 24 h Le Mans | 7 | LMP1/98 | Alboreto / Johansson / Dalmas | Porsche AG | DNF |
| 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 | 60 | 993 GT2 R | Jarier / Rosenblad / Donovan | Ets Chéreau | DNF |
| 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 | 62 | 993 GT2 R | Morton / Graham / Grohs | C. J. Motorsport | 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 |