The 1998 Visa Sports Car Championships was the tenth and final round the 1998 FIA GT Championship season. It took place at the Laguna Seca Raceway, California, United States on October 25, 1998.

This race shared the weekend with a Professional SportsCar Racing Championship event.

Official results Class winners are in bold. Cars failing to complete 70% of winner's distance are marked as Not Classified (NC).

Pos Class No Team Drivers Chassis Tyre Laps Engine 1 GT1 2 AMG Mercedes Klaus Ludwig Ricardo Zonta Mercedes-Benz CLK LM 139 Mercedes-Benz M119 6.0L V8 2 GT1 1 AMG Mercedes Bernd Schneider Mark Webber Mercedes-Benz CLK LM 139 Mercedes-Benz M119 6.0L V8 3 GT1 8 Porsche AG Jörg Müller Uwe Alzen Porsche 911 GT1-98 138 Porsche 3.2L Turbo Flat-6 4 GT1 3 DAMS Éric Bernard David Brabham Panoz GTR-1 137 Ford (Roush) 6.0L V8 5 GT1 6 Zakspeed Racing Michael Bartels Max Angelelli Porsche 911 GT1-98 138 Porsche 3.2L Turbo Flat-6 6 GT1 11 Team Persson Motorsport Christophe Bouchut Bernd Mayländer Mercedes-Benz CLK GTR 135 Mercedes-Benz M120 6.0L V12 7 GT2 51 Viper Team Oreca Olivier Beretta Pedro Lamy Chrysler Viper GTS-R 127 Chrysler 8.0L V10 8 GT2 57 Roock Racing Bruno Eichmann Mike Hezemans Porsche 911 GT2 126 Porsche 3.6L Turbo Flat-6 9 GT2 63 Krauss Race Sports International Michael Trunk Bernhard Müller Porsche 911 GT2 123 Porsche 3.6L Turbo Flat-6 10 GT2 58 Roock Sportsystem André Ahrlé Robert Schirle Dirk Layer Porsche 911 GT2 122 Porsche 3.6L Turbo Flat-6 11 GT1 12 Team Persson Motorsport Jean-Marc Gounon Marcel Tiemann Mercedes-Benz CLK GTR 121 Mercedes-Benz M120 6.0L V12 12 GT2 60 Elf Haberthur Racing Michel Neugarten Gerd Ruch Zak Brown Porsche 911 GT2 118 Porsche 3.6L Turbo Flat-6 13 GT2 80 GP Motorsport Daniel Dor John Young Peter Gregg Saleen Mustang SR ? 118 Ford 5.9L V8 14 GT2 69 Proton Competition Gerold Ried Patrick Vuillaume Porsche 911 GT2 65 Porsche 3.6L Turbo Flat-6 15 GT2 53 Chamberlain Engineering Ni Amorim Spencer Trenery Hans Hugenholtz Chrysler Viper GTS-R 117 Chrysler 8.0L V10 16 GT2 87 Seikel Motorsport Tony Burgess Gerhard Marchner Manfred Jurasz Porsche 911 GT2 113 Porsche 3.6L Turbo Flat-6 17 GT2 65 Konrad Motorsport Martin Stretton Toni Seiler Porsche 911 GT2 105 Porsche 3.6L Turbo Flat-6 18DNF GT2 81 Freisinger Motorsport Wolfgang Kaufmann Michel Ligonnet Porsche 911 GT2 ? 84 Porsche 3.6L Turbo Flat-6 19DNF GT2 61 Elf Haberthur Racing Bruno Lambert Mike Conte Porsche 911 GT2 76 Porsche 3.6L Turbo Flat-6 20DNF GT2 76 Seikel Motorsport Nigel Smith Andrew Bagnall Max Cohen-Olivar Porsche 911 GT2 62 Porsche 3.6L Turbo Flat-6 21DNF GT1 7 Porsche AG Yannick Dalmas Allan McNish Porsche 911 GT1-98 44 Porsche 3.2L Turbo Flat-6 22DNF GT2 71 Marcos Racing International Herman Buurman Manno Schaafsma Marcos LM600 33 Chevrolet 5.9L V8 23DNF GT2 70 Marcos Racing International Christian Vann Harald Becker Cor Euser Marcos LM600 21 Chevrolet 5.9L V8 24DNF GT2 62 Stadler Motorsport Renato Mastropietro Uwe Sick William Langhorne Porsche 911 GT2 19 Porsche 3.6L Turbo Flat-6 25DNF GT2 86 Larbre Compétition Jean-Luc Chéreau Jack Leconte Porsche 911 GT2 15 Porsche 3.6L Turbo Flat-6 26DNF GT2 56 Roock Racing Claudia Hürtgen Stéphane Ortelli Porsche 911 GT2 7 Porsche 3.6L Turbo Flat-6 27DNF GT2 66 Konrad Motorsport Jan Lammers Franz Konrad Porsche 911 GT2 7 Porsche 3.6L Turbo Flat-6 DNS GT2 52 Viper Team Oreca Karl Wendlinger David Donohue Chrysler Viper GTS-R – Chrysler 8.0L V10 DNS GT2 55 Saleen-Allen Speedlab Andy Pilgrim Ron Johnson Terry Borcheller Saleen Mustang SR ? – Ford 5.9L V8

Statistics Pole position – #2 AMG Mercedes – 1:16.154 Fastest lap – #2 AMG Mercedes – 1:19.094 Average speed – 158.815 km/h

References