| 22.3.1998 | 12 h Sebring | 01 | 993 GT2 R | Tremblay / Snow / Rohr | Rohr | 33rd |
| 22.3.1998 | 12 h Sebring | 01A | 911 GT1 | | Rohr | DNE |
| 22.3.1998 | 12 h Sebring | 04 | 993 GT2 R | Morton / Graham / Fellows | C. J. Motorsports | 9th |
| 22.3.1998 | 12 h Sebring | 07 | 993 | Marshall / Marshall / Huisman / Law | G & W Motorsports | 15th |
| 22.3.1998 | 4 h Jarama | 5 | 993 GT2 Evo | Saldaña / de Orleans | Kremer Racing | 6th |
| 22.3.1998 | 12 h Sebring | 23 | 993 Carrera RSR | Slater / Wagner / Havens | Alex Job Racing | 14th |
| 22.3.1998 | 12 h Sebring | 24 | 911 Carrera RSR | Refenning / Vargo / Vargo / Refenning | Tim Vargo | 18th |
| 22.3.1998 | 12 h Sebring | 25 | 911 Carrera RSR | Slater / Kitch / Cilli / White / Petersen | Alex Job Racing | 19th |
| 22.3.1998 | 4 h Jarama | 29 | 993 GT2 R | Monteiro / Monteiro | Estoril Racing Team | 2nd |
| 22.3.1998 | 4 h Jarama | 32 | 993 GT2 | Pagotto / Giribaldi | GT Racing Team | DNA |
| 22.3.1998 | 4 h Jarama | 33 | 993 GT2 | Kumpen / Cohen / Margueron | PK Racing | 4th |
| 22.3.1998 | 4 h Jarama | 34 | 993 GT2 R | Pareja / Chéreau / Leconte | Chereau Sports | 3rd |
| 22.3.1998 | 4 h Jarama | 35 | 993 GT2 | Giacomelli / Kaufmann | Freisinger Motorsport | DNS |
| 22.3.1998 | 4 h Jarama | 38 | 993 Cup | Blieninger / Riccitelli | RWS Brun Motorsport | 5th |
| 22.3.1998 | 12 h Sebring | 46 | 911 Carrera RSR | Schmidt / Bingham | Bill Radar | 23rd |
| 22.3.1998 | 4 h Jarama | 52 | 911 Carrera RSR 3.8 | Touroul / Ricci / Ortion | Raymond Touroul | DNS |
| 22.3.1998 | 4 h Jarama | 53 | 993 Cup | Blieninger / Riccitelli | RWS Brun Motorsport | DNA |
| 22.3.1998 | 4 h Jarama | 54 | 993 Cup | Guillot / Albouy / Thomas | Pilotage Passion | DNS |
| 22.3.1998 | 12 h Sebring | 55 | 911 Carrera RSR | Ralston / Collins / Trejos | AASCO Performance | 29th |
| 22.3.1998 | 4 h Jarama | 55 | 993 Cup | Bajo / Bajo / Bilardo | Eco Tec | 10th |
| 22.3.1998 | 4 h Jarama | 57 | 993 Cup | Perrier / Richard | Thierry Perrier | 9th |
| 22.3.1998 | 12 h Sebring | 58 | 944 Turbo | Mazzuoccola / Wolkoff / Raccaro / Fillipakis | Al Broadfoot | unused |
| 22.3.1998 | 12 h Sebring | 66 | 993 GT2 | Ham / Konrad | Konrad Racing | 5th |
| 22.3.1998 | 12 h Sebring | 67 | 993 Carrera RSR | Baron | The Racers Group | 43rd |
| 22.3.1998 | 12 h Sebring | 68 | 993 Carrera RSR | Earle / Collin / Buckler | The Racers Group | 27th |
| 22.3.1998 | 12 h Sebring | 69 | 993 Carrera Turbo | Spreng | Gustl Spreng | 46th |
| 22.3.1998 | 12 h Sebring | 71 | 993 GT2 Evo | Pilla / Kimbrough / Kitchak | Art Pilla | 22nd |
| 22.3.1998 | 12 h Sebring | 76 | 993 Carrera RSR | Ruther / Vargo / Anegelos / Argetsinger | Team A.R.E. | 16th |
| 22.3.1998 | 12 h Sebring | 77 | 993 GT2 R | Rössler / Kitchak / Turner | Konrad Motorsport | 31st |
| 22.3.1998 | 4 h Jarama | 77 | 968 | Leyrana / Mothe | Igancio Leyrana | DNF |
| 22.3.1998 | 4 h Jarama | 78 | 968 | Gonzales / Gacia | Manuel Gonzales | 12th |
| 22.3.1998 | 4 h Jarama | 79 | 911 | Fernandez Davila / Reis | Eduardo Davila | DNF |
| 22.3.1998 | 4 h Jarama | 80 | 968 | Martín Cantero / Ligonnet | Santiago Martin Cantero | DNF |
| 22.3.1998 | 4 h Jarama | 81 | 968 | Rosado Dominguez / Ligonnet | Manuel Rosado | DNF |
| 22.3.1998 | 12 h Sebring | 86 | 993 | Law / Pfeffer | First Union | 42nd |
| 22.3.1998 | 12 h Sebring | 96 | 993 | Wheeler / Davies / Zitza | Olive Garden Racing | 21st |
| 22.3.1998 | 12 h Sebring | 99 | 993 GT2 | Nearn / O'Steen / Schumacher | Larry Schumacher | 10th |
| 23.3.1998 | Test Silverstone | 38 | 911 Carrera RSR | Barrett / Lockie | | 18th |
| 23.3.1998 | Test Silverstone | 46 | 964 Carrera RSR 3.8 | Lucas / Osborne | PK Sport | 21st |
| 23.3.1998 | Test Silverstone | | 993 GT2 R | Day / Astley | PK Sport | 12th |
| 23.3.1998 | Test Silverstone | | 993 GT2 R | Saunders / Saunders | Parr Motorsport | 13th |
| 23.3.1998 | Test Silverstone | | 993 GT2 R | Lister / Morrison | Blue Coral | 10th |
| 23.3.1998 | Test Silverstone | | 911 GT1 | Greasley / Wallinder | Blue Coral | 3rd |
| 23.3.1998 | Test Silverstone | | 911 GT1 | Morelli / Goode | Millenium | 6th |
| 23.3.1998 | Test Silverstone | | 911 Turbo | Wellings / Guest | | 22nd |
| 23.3.1998 | Test Silverstone | | 993 GT2 | Konig / Chambers | | 15th |
| 23.3.1998 | Test Silverstone | | 993 GT1 | Masarati / Mortimer | | 17th |
| 29.3.1998 | 1000 km Monza | 9 | 911 Turbo | Ploeg / Bleekemolen / Papenburg | Bert Ploeg | DNF |
| 29.3.1998 | 1000 km Monza | 12 | 993 GT2 | Grassi / Colombo / Muenz | Rugerro Grassi | DNF |
| 29.3.1998 | 1000 km Monza | 14 | 993 GT2 | Frigerio / Babini / Sabatini | Massimo Frigerio | 5th |
| 29.3.1998 | 1000 km Monza | 15 | 993 GT2 R | Smith / Palmberger / Quargentan | Seikel Motorsport | 9th |
| 29.3.1998 | 1000 km Monza | 19 | 911 | Ried / Felbermayr, Sr. / Felbermayr, Jr. | Proton Competition | DNF |
| 29.3.1998 | 1000 km Monza | 21 | 993 GT2 | Mastropietro / Polli / Mastropietro | Promosport | 3rd |
| 29.3.1998 | 1000 km Monza | 22 | 993 GT2 R | Sangiuolo / Lusuardi / De Iturbe | RWS-Brun Motorsport | 4th |
| 29.3.1998 | 1000 km Monza | 23 | 993 Carrera RSR 3.8 | Hofer / Blieninger / Riccitelli | RWS-Brun Motorsport | 12th |
| 29.3.1998 | 1000 km Monza | 24 | 964 Carrera RSR 3.8 | Cassina / Michelotti / Bocciardi | Matteo Cassina | DNF |
| 29.3.1998 | 1000 km Monza | 25 | 964 Carrera RSR 3.8 | Haupt / Merzatico / Cattaneo / Gottifredi | Claudio Haupt | 11th |
| 29.3.1998 | 1000 km Monza | 26 | 993 Cup | Cerati / Sala / Simoncini | M.A.C. Racing | 10th |
| 29.3.1998 | 1000 km Monza | 27 | 964 Carrera RS | Tapparo / Padovani / Virdis | M.A.C. Racing | DNF |
| 29.3.1998 | 1000 km Monza | 29 | 911 Carrera Cup | Cattaneo / De Castro / Corongi | Win Sport Srl | 8th |
| 29.3.1998 | 1000 km Monza | 32 | 911 Carrera RS | Viganó / Rosa | Giovanni Viganó | 15th |
| 5.4.1998 | British GT Silverstone | 0 | 911 GT1 | Greasley / Wallinder | Blue Coral/Slick 50/Quaker State | 1st |
| 5.4.1998 | British GT Silverstone | 9 | 993 GT1 | Masarati / Mortimer | RMA Driving Sensations | 14th |
| 5.4.1998 | British GT Silverstone | 11 | 911 GT1 | Nielsen / Thyrring | Millennium Motorsport | 5th |
| 5.4.1998 | British GT Silverstone | 33 | 993 GT2 R | Saunders / Saunders | Gaumont/Parr Motorsport | 13th |
| 5.4.1998 | British GT Silverstone | 38 | 911 Carrera RSR | Lockie / Barrett | Premium Team - Carmichaels Motorsport | DNF |
| 5.4.1998 | British GT Silverstone | 40 | 993 GT2 R | Astley / Day | PK Sport | 10th |
| 5.4.1998 | British GT Silverstone | 46 | 964 Carrera RSR 3.8 | Lucas / Osborne | PK Sport | DNF |
| 5.4.1998 | British GT Silverstone | 50 | 993 GT2 R | Morrison / Lister | Blue Coral/Slick 50/Quaker State | 9th |
| 5.4.1998 | British GT Silverstone | 58 | 911 Turbo | Wellings / Guest | Wellings/Guest | DNF |
| 12.4.1998 | FFSA GT Nogaro | 1 | 993 GT2 | Goueslard / Sourd | Larbre Compétition | 1st/2nd |
| 12.4.1998 | FFSA GT Nogaro | 2 | 993 GT2 R | Jarier / Lafon | Sonauto-Levallois | 2nd/1st |
| 12.4.1998 | FFSA GT Nogaro | 4 | 993 GT2 | Roland Bervillé | Alméras Fréres | 6th/6th |
| 12.4.1998 | 500 km Oschersleben | 5 | 911 GT1-98 | Grau / Scheld | Zakspeed Racing | 4th |
| 12.4.1998 | 500 km Oschersleben | 6 | 911 GT1-98 | Bartels / Hahne | Zakspeed Racing | 14th |
| 12.4.1998 | FFSA GT Nogaro | 6 | 993 GT2 | Nourry / Perrier | Michel Nourry | 3rd/3rd |
| 12.4.1998 | FFSA GT Nogaro | 7 | 993 GT2 R | Yver / Chéreau | Larbre Compétition | 5th/5th |
| 12.4.1998 | 500 km Oschersleben | 7 | 911 GT1-98 | McNish / Dalmas | Porsche AG | 15th |
| 12.4.1998 | 500 km Oschersleben | 8 | 911 GT1-98 | Alzen / Müller | Porsche AG | 20th |
| 12.4.1998 | FFSA GT Nogaro | 32 | 993 Cup | François Bourcier | JB Racing | 21st/DNS |
| 12.4.1998 | FFSA GT Nogaro | 37 | 993 Cup | Comte / Dumas | SLM | 17th/15th |
| 12.4.1998 | FFSA GT Nogaro | 38 | 993 Cup | Salles / Davy | Michel Nourry | 13th/12th |
| 12.4.1998 | FFSA GT Nogaro | 43 | 993 Cup | Boin / Véroux | Jean-François Veroux | 14th/13th |
| 12.4.1998 | 500 km Oschersleben | 56 | 993 GT2 R | Hürtgen / Ortelli | Roock Racing | DNF |
| 12.4.1998 | 500 km Oschersleben | 57 | 993 GT2 | Eichmann / Maassen | Roock Racing | DQ |
| 12.4.1998 | 500 km Oschersleben | 58 | 993 GT2 | Ahrlé / Prutirat | Roock Sportsystem | 16th |
| 12.4.1998 | 500 km Oschersleben | 60 | 993 GT2 R | Neugarten / Ruch / Spinelli | Elf Haberthur Racing | 12th |
| 12.4.1998 | FFSA GT Nogaro | 61 | 964 Carrera Cup | Camus / Dro | Red Racing | 18th/17th |
| 12.4.1998 | 500 km Oschersleben | 61 | 993 GT2 R | Poulain / Graham / Smadja | Elf Haberthur Racing | DNF |
| 12.4.1998 | 500 km Oschersleben | 62 | 993 GT2 | Sick / Rohr | Stadler Motorsport | 17th |
| 12.4.1998 | FFSA GT Nogaro | 62 | 964 Carrera Cup | Franck Solladier | Team Solladier | 12th/16th |
| 12.4.1998 | FFSA GT Nogaro | 63 | 964 Carrera Cup | Fresnais / Tondu | Laurent Fresnais | 20th/18th |
| 12.4.1998 | 500 km Oschersleben | 63 | 993 GT2 | Trunk / Müller | Krauss Race Sports | 10th |
| 12.4.1998 | 500 km Oschersleben | 64 | 993 GT2 | | Krauss Race Sports | DNA |
| 12.4.1998 | 500 km Oschersleben | 65 | 993 GT2 R | Seiler / Stretton | Konrad Motorsport | 9th |
| 12.4.1998 | 500 km Oschersleben | 66 | 993 GT2 | Konrad / Ham | Konrad Motorsport | 8th |
| 12.4.1998 | 500 km Oschersleben | 69 | 993 GT2 | Ried / Vuillaume | Proton Competition | 19th |
| 12.4.1998 | FFSA GT Nogaro | 94 | 944 Turbo Cup | Gallardo / Garcia | Pitline | 19th/19th |
| 12.4.1998 | 500 km Oschersleben | 96 | 993 GT2 | Felbermayr, Sr. / Felbermayr, Jr. | Proton Competition | 18th |
| 19.4.1998 | Belcar Zolder NRF | 1 | 911 | Dupont / Taels | FINA - GLPK Racing | 42nd |