The 1998 Professional SportsCar Racing Championship season was the 28th season of the IMSA GT Championship, the final one of the original IMSA. It consisted of an open-cockpit World Sports Car (WSC) class of prototypes and Grand Tourer-style racing cars divided into GT1, GT2, and GT3 classes. It began March 22, 1998, and ended October 25, 1998, after eight rounds.

The IMSA GT Championship was replaced by the American Le Mans Series in 1999, which was supported by the Automobile Club de l'Ouest (ACO). This series, based on the 24 Hours of Le Mans, was initially previewed during the 1998 season with the running of the inaugural Petit Le Mans. Professional SportsCar Racing remained as the series organizer.

Of note is the lack of the 24 Hours of Daytona and the Six Hours of Watkins Glen, both of which were acquired by the revived SCCA United States Road Racing Championship.

Schedule

Rnd Race LengthClass CircuitLocation Date 1 Superflo 12 Hours of Sebring 12 Hours Both Sebring International RacewaySebring, Florida March 22 2 Toshiba Nevada Grand Prix 3 Hours 45 Minutes Both Las Vegas Motor SpeedwayLas Vegas, Nevada April 26 3 The Dodge Dealers Grand Prix† 1 Hour 45 Minutes WSC Lime Rock ParkLakeville, Connecticut May 251 Hour 45 Minutes GT 4 Sports Car Grand Prix of Road Atlanta 3 Hours 45 Minutes Both Road AtlantaBraselton, Georgia June 21 5 Mosport Festival 2 Hours 45 Minutes Both MosportBowmanville, Ontario August 9 6 NAPA Sebring Classic 3 Hours Both Sebring International RacewaySebring, Florida September 20 7 Petit Le Mans 10 Hours or 1000 Miles Both Road AtlantaBraselton, Georgia October 10 8 Visa Sports Car Championships 2 Hours 30 Minutes Both Laguna Seca RacewayMonterey, California October 25 † - Two separate races were held for Lime Rock: One for WSC, one for the GT classes.

Daytona and Watkins Glen move to the new United States Road Racing Championship for 1998. Sears Point Raceway and Pikes Peak International Raceway were also dropped from the calendar. Petit Le Mans that also ran to ACO regulations was also added to the calendar. Entry list Sources: WSC TeamChassisEngineTyreNo.DriversRnds. BMW Motorsport Schnitzer MotorsportRiley & Scott Mk IIIBMW 4.0 L V82 Bill Auberlen7*, 8 Didier de Radiguès7*, 8 Pierluigi Martini7*3 Hans-Joachim Stuck7*, 8 Steve Soper7*, 8 Tom Kristensen7* Doyle-Risi RacingFerrari 333 SPFerrari F310E 4.0 L V127 Wayne TaylorAll Eric van de PoeleAll Fermín Vélez1 Emmanuel Collard7 Transatlantic Racing ServicesRiley & Scott Mk IIIFord 5.0 L V88 Scott Schubot1, 3–4, 6-8 Henry Camferdam1, 3–4, 6-8 Johnny O'Connell1 Butch Leitzinger7 Genesis RacingKudzu DG-2Buick 3.0 L V611 Mark Neuhaus4 Michael DeFontes4Hawk MD3RChevrolet 6.0 L V812 Chuck Goldsborough1, 4 Rick Fairbanks1, 4 Mark Neuhaus1 Michael DeFontes1 Dyson RacingRiley & Scott Mk IIIFord 5.0 L V816 Butch Leitzinger1, 3–6, 8 James Weaver1, 3–6, 8 Elliott Forbes-Robinson1201, 3–6, 8 Dorsey Schroeder1, 3–6, 8 Butch Leitzinger1 James Weaver1 Davin RacingKudzu DG-2Buick 3.0 L V6?19 Edd Davin1* A.J. Smith1* Mark Montgomery1* Solution FRiley & Scott Mk IIIFord 5.0 L V821 Philippe Gache7 Anthony Beltoise7 Jérôme Policand7 Doran Enterprises, Inc. MOMO Doran RacingFerrari 333 SPFerrari F310E 4.0 L V1227 30 Didier Theys1, 3, 5, 7–8 Mauro Baldi1, 7 Gianpiero Moretti1 Fredy Lienhard3, 5, 7–8 Intersport RacingRiley & Scott Mk IIIFord 5.0 L V828 Jon FieldAll Butch Brickell1–2, 6 Rick Sutherland1–2, 8 Sam Brown3 Joaquin DeSoto4, 7 Richard Geck4 Jacek Mucha5–6 John Mirro7 Jeret Schroeder7Spice SC95 (1-2) Riley & Scott Mk III (7-8)Oldsmobile Aurora 4.0 L V8 (1-2) Ford 5.0 L V8 (7-8)29 59 Joaquin DeSoto1–2 John Mirro1–2 Simon Gregg1, 7 Alex Smith1 Ken Dromm7–8 Jacek Mucha7–8 Matthews-Colucci RacingRiley & Scott Mk IIIFord 5.0 L V836 Jim Matthews3–4, 6 Bill Dollahite3 Barry Waddell4 David Murry5391–4, 7 Jim Matthews1–2, 7 Hurley Haywood1 Derek Bell1 Dorsey Schroeder2 Tom Kendall3 Stefan Johansson4 Fantasy JunctionCannibalChevrolet 6.0 L V8?51 Bruce Trenery1* Spencer Trenery1* Grahame Bryant1* Kopf Race ProductsKeiler KIIFord 5.0 L V860 Shane Donley2, 8 Kris Wilson2, 8 Downing AtlantaKudzu DLMMazda R26B 2.6 L 4-Rotor62 Paul Debban4 Dennis Spencer4Kudzu DLM (1-7) Kudzu DLY (8)Mazda 2.0 L 3-Rotor (1) Mazda R26B 2.6 L 4-Rotor (2-8)63 Jim DowningAll Yojiro Terada1, 7 Jim Pace1 Chris Ronson2 Howard Katz3–4, 7 A.J. Smith5 Rich Grupp6 Porsche AG Joest RacingPorsche LMP1-98Porsche Type-935 3.2 L Turbo Flat-677 Michele Alboreto7 Stefan Johansson7 Jörg Müller7 Dollahite RacingFerrari 333 SPFerrari F310E 4.0 L V1288 Bill Dollahite2–3, 7–8 Mike Davies2–3, 7–8 Anthony Lazzaro7* Denaba RacingKudzu DLMBuick 4.5L V6?92 Joaquin DeSoto6 A.J. Smith6 TRV MotorsportKudzu DL-4Chevrolet 6.0 L V895 Jeret Schroeder1 Tom Volk1 Lyn St. James1 Team CascadiaArgo JM20Chevrolet SB-2 6.0L V897 Shane Lewis6, 8 Ed Zabinski6, 8

GT1 TeamChassisEngineTyreNo.DriversRnds. Luis SereixChevrolet Beretta (1) Chevrolet Camaro (6)Chevrolet V8?0 13 Luis Sereix1*, 6* Daniel Urrutia1*, 6* Daniel Urrutia, Jr.1* Panoz Motorsports Visteon Panoz Racing TeamPanoz Esperante GTR-1 Q9Ford (Roush) 6.0 L V8 Zytek Hybrid Electric07 John Nielsen7 Doc Bundy7 Christophe Tinseau7Panoz Esperante GTR-1Ford (Roush) 6.0L V84 Andy WallaceAll David BrabhamAll Scott Pruett7 Éric Bernard75All Jamie Davies1, 7 Doc Bundy1 Raul Boesel2–5 Johnny O'Connell6–8454 Doc Bundy4 Mosler AutomotiveMosler RaptorChevrolet 6.3 L V82 Shane Lewis1–3 Vic Rice1–3 Tom Reese1 Greg MalvascChevrolet CamaroChevrolet V83 Jerry Kinn1 Chuck Singletary1 Gerre Payvis1 Robinson RacingOldsmobile Aurora GTS-1Oldsmobile 4.0 L V811 Jack Baldwin1 Irv Hoerr1 George Robinson1 Bruce BarkelewFord MustangFord 4.6L V8?12 Brian Simo3 Porsche AGPorsche 911 GT1-98Porsche 3.2 L Turbo Flat-626 Allan McNish7 Uwe Alzen7 Yannick Dalmas7 Champion MotorsPorsche 911 GT1 EvoPorsche 9R1 3.2 L Turbo Flat-638 74 Thierry Boutsen1, 4, 7 Bob Wollek1, 4, 7 Andy Pilgrim1 Ralf Kelleners7 Art PillaPorsche 993 GT2 EvoPorsche 3.6 L Turbo Flat-671 Art Pilla1 Oma Kimbrough1 David Kitchak1 G&W MotorsportsPorsche 911 GT1Porsche 9R1 3.2 L Turbo Flat-677 Darren Law6 Danny Marshall6 Andy Pilgrim6* John AnnisChevrolet CamaroChevrolet V8?87 John Annis1 Lee Hill1 Randy Pobst1 Mick Robinson1 Rock Valley RacingChevrolet CamaroChevrolet V891 John Heinricy1 Stu Hayner1 Roger Schramm1

GT2 TeamChassisEngineTyreNo.DriversRnds. David FriedmanPorsche 993 Carrera RSRPorsche 3.8L Flat-600 David Friedman3, 5 Todd Snyder3 Nick Longhi5 Larbre CompétitionPorsche 993 GT2Porsche 3.6 L Turbo Flat-600 Patrice Goueslard7 Stéphane Ortelli7 Jack Leconte7 RohrPorsche 993 GT2Porsche 3.6 L Turbo Flat-601 Sylvain Tremblay1 Martin Snow1 Jochen Rohr1 C. J. MotorsportsPorsche 993 GT2Porsche 3.6 L Turbo Flat-604 John Morton1, 5, 7 John Graham1, 5, 7 Ron Fellows1, 7 Prototype Technology GroupBMW M3BMW 3.2 L I66 Boris Said2–4 Andy Pilgrim2 Bill Auberlen2 Marc Duez3–5 Brian Simo4 Ross Bentley5 American Spirit RacingVector M12Lamborghini 5.7 L V1215 Bill Eagle1–2 Dorsey Schroeder1–2 Kevin Allen4 Randy Pobst4 Hi-Tech PerformanceToyota SupraToyota Turbo I4?31 Michael Smellie1* Chris Harris1* Michael Lewis1* Chris Smellie1* GTR Motorsport, Inc.Porsche 993 Carrera RSRPorsche 3.8L Flat-6?37 Jim Loftis7* Bob Strange7* John Finger7* Mark HeinAcura NSXAcura 3.2 L V638 Mark Hein1 Gary Blackman1 John Green1 Pete Halsmer1 Bell MotorsportsBMW M3BMW 3.2L I6?54 Scott Neuman6 Andy Pilgrim6 Martin Snow RacingPorsche 993 GT2Porsche 3.6 L Turbo Flat-656 Martin Snow6, 8 Melanie Snow6, 8 Al BroadfootPorsche 944 TurboPorsche 2.8 L Turbo58 Bob Mazzuoccola1* Sam Wolkoff1* Mark Raccaro1* John Fillipakis1* Marcos Racing InternationalMarcos LM600Chevrolet 6.0 L V859 71 Cor Euser7–8 Christian Vann7 Harald Becker7 Herman Buurman8 Saleen/Allen SpeedlabSaleen Mustang SRFord 5.9 L V8?65 Ron Johnson1, 8 Steve Saleen1 Tommy Archer1 Andy Pilgrim8 Terry Borcheller8 Konrad MotorsportPorsche 993 GT2Porsche 3.6 L Turbo Flat-666 Nick Ham1–2 Franz Konrad1–2727–8 Jan Lammers7–873 Angelo Zadra7 Charles Slater7 Peter Kitchak7771 Wido Rössler1 Matt Turner1 Charles Coker Jr.Porsche 968 Turbo RSPorsche 3.0 L Turbo I468 Charles Coker Jr.7 Joe Varde7 Joe Foster7 Dave White7 Gustl SprengPorsche 993 GT2Porsche 3.6 L Turbo Flat-669 Gustl Spreng1 Kersten Jodexnis1 Ray Mummery1 Pettit RacingMazda RX-7Mazda 2.0 L 3-Rotor75 Cameron Worth7 Scott Sansone7 Team A.R.E.Porsche 993 GT2Porsche 3.6 L Turbo Flat-676 Mike Doolin8 Scott Peeler8 Freisinger MotorsportPorsche 993 GT2Porsche 3.6 L Turbo Flat-681 Michel Ligonnet7 Lance Stewart7 Jean-Pierre Jarier7* Wolfgang Kaufmann7* Spirit of DaytonaToyota SupraToyota Turbo I4?88 Craig Conway4* Eric van Cleef4* Schumacher RacingPorsche 993 GT2Porsche 3.6 L Turbo Flat-699 Larry Schumacher1–6, 8 John O'Steen1, 4–6, 8 Robert Nearn1 Martin Snow2 Joe Varde3 Andy Pilgrim4–5, 8

GT3 TeamChassisEngineTyreNo.DriversRnds. G & W MotorsportsPorsche 993 Carrera RSRPorsche 3.8L Flat-607 Danny Marshall1 Steve Marshall1 Patrick Huisman1 Darren Law186 Mike Fitzgerald1, 4 Darren Law1, 6 Steve Pfeffer1 Cort Wagner4 Steve Marshall6–7 Danny Marshall7 Sylvain Tremblay7 Prototype Technology GroupBMW M3 (E36)BMW 3.2 L I61 Craig Carter1 Andy Petery1 Giovanna Amati1 Peter Cunningham2–5, 7–8 Ross Bentley2–5 Brian Simo7 Terry Borcheller7 Javier Quiros7 Bill Auberlen86 Peter Cunningham1, 6, 8 Ross Bentley1, 6–7 Mark Simo1, 8 Darren Law7 Jeff Schafer7 David Besnard710 Bill Auberlen1–7 Boris Said1 Mark Simo2–8 Marc Duez2 Andy Pilgrim7 Ross Bentley8 T. C. KlineBMW M3 (E36)BMW 3.2 L I612 Pete Halsmer7 Randy Pobst7 Shane Lewis7 AASCO PerformancePorsche 993 Carrera RSRPorsche 3.8L Flat-617 Tom Peterson2, 8 Dennis Aase2, 855 Tim Ralston1–2, 8 Jorge Trejos1–2 Kelly Collins1 Charles Slater8 Reisman Property Interests, Inc.Chevrolet CamaroChevrolet 5.7L V8?22 John Reisman3 Paul Reisman3 Alex Job RacingPorsche 993 Carrera RSRPorsche 3.8L Flat-622 Kelly Collins6, 8 Cort Wagner6 Darryl Havens823 Darryl Havens1–7 Cort Wagner1–5, 7–8 Charles Slater1 Kelly Collins4, 6–7 David Murry825 Don Kitch1–2, 8 Michael Petersen1–2, 8 Dale White1–2 Charles Slater1 Angelo Cilli1 'Trip' Goolsby8 Tim VargoPorsche 993 Carrera RSRPorsche 3.8L Flat-624 Tim Vargo1, 3–4 Brady Refenning1, 3–4 Josh Vargo1, 4 Jack Refenning1 Jake Vargo4 Darn Good FoodsPorsche 993 Carrera RSRPorsche 3.8L Flat-6?31 Steve Velasquez8 Steven Alarcon8 Phoenix MotorsportsPontiac FirebirdPontiac V832 Don Knowles1 Jim McNeely1 John Heinricy1 Jim Michaelian133 Jim Michaelian1 Steve McNeely1 Joe Aquilante1 TechnodynePorsche 993 Carrera RSRPorsche 3.8L Flat-6?41 Chris Cervelli2 Bruce Busby2 Bill RadarPorsche 993 Carrera RSRPorsche 3.8L Flat-646 Max Schmidt1 Chris Bingham1 John FingerPorsche 993 Carrera RSRPorsche 3.8L Flat-6?48 John Finger4 Mike Green4 Bell MotorsportsBMW M3 (E36)BMW 3.2 L I654 Carlos de Quesada1 Terry Borcheller1 Scott Neuman1 Joe Varde1 KryderacingNissan 240SXNissan 2.4 L I457 Luis Sereix1 Frank Del Vecchio1 Reed Kryder1 The Racer's GroupPorsche 993 Carrera RSRPorsche 3.8L Flat-667 Steve Pelke1, 8 Peter Baron1 Dennis O'Keefe1 Scott Killips868 Kevin Buckler1, 8 Stephen Earle1 Philip Collin1 Vic Rice8 Gordon ZimmermanPorsche 993 Carrera RSRPorsche 3.8L Flat-6?71 Gordon Zimmerman3 Steve Pfeffer3 Team A.R.E.Porsche 993 Carrera RSRPorsche 3.8L Flat-676 Peter Argetsinger1, 7 John Ruther1 Jake Vargo1 Nick Anegelos1 Mike Doolin2 Scott Peeler2 Richard Polidori7 Angelo Cilli7 Raymond BoissoneauMazda RX-7Mazda 2.0 L 3-Rotor?81 Raymond Boissoneau3 Nicolas Rondet3 Rino Mastronardi3 Team EcuadorNissan 240SXNissan 2.4 L I493 Henry Taleb1, 7 Rob Wilson1, 7 Rino Mastronardi1 Xavier Collado7 Olive Garden RacingPorsche 993 Carrera RSRPorsche 3.8L Flat-696 Kevin Wheeler1 Mike Davies1 Ron Zitza1 Pumpelly Mitchum RacingPorsche 993 Carrera RSRPorsche 3.8L Flat-6?98 Spencer Pumpelly3 Matt Plumb3

Season results