| Pos. | No. | Driver / Nationality | Car | Entrant | Laps | Time/retired | Grp Pos | Group | Grid | Qual Time |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 8 | A.J.Foyt (USA)
Bob Wollek (F) Al Unser Sr (USA) Thierry Boutsen (B) William Howe (USA)^ |
Porsche 962 104 | Preston Henn | 703 | 1 | GTP | 3 | 1:43.590 | |
| 2 | 14 | Al Holbert (USA)
Al Unser Jr (USA) Derek Bell (GB) |
Porsche 962 103 | Al Holbert | 686 | 2 | GTP | 4 | 1:44.789 | |
| 3 | 67 | Jim Busby (USA)
Rick Knoop (USA) Jochen Mass (D) |
Porsche 962 106 | Jim Busby | 674 | 3 | GTP | 13 | 1:48.375 | |
| 4 | 5 | Hans-Joachim Stuck Jr (D)
Bob Akin (USA) Paul Miller (USA) Walter Brun (CH)* |
Porsche 962 102 | Bob Akin | 670 | 4 | GTP | 5 | 1:45.471 | |
| 5 | 7 | Jim Mullen (USA)
Kees Nierop (CDN) Ray McIntyre (USA) |
Porsche 935-84 (Fabcar) | Bob Akin | 668 | 5 | GTP | 21 | 1:50.843 | |
| 6 | 2 | Skeeter McKitterick (USA)
Terry Wolters (USA) Art Leon (USA) |
March-Chevrolet 84G | Leon Brothers | 654 | 6 | GTP | 15 | 1:49.203 | |
| 7 | 1 | Bill Whittington (USA)
Randy Lanier (USA) Al Leon (USA) |
March-Porsche 85G | Leon Brothers | 652 | 7 | GTP | 6 | 1:45.584 | |
| 8 | 65 | Wally Dallenbach Jr (USA)
John Jones (CDN) Doc Bundy (USA) Willy T. Ribbs (USA)^ |
Ford Mustang (Roush) | Jack Roush | 637 | 1 | GTO | 26 | 1:54.209 | |
| 9 | 9 | Jack Newsome (USA)
Wayne Baker (USA) Chip Mead (USA) Ren Tilton (USA) |
Porsche 935 009 0030 | Wayne Baker | 624 | 9 | GTP | 29 | 1:54.803 | |
| 10 | 93 | Kelly Marsh (USA)
Ron Pawley (USA) Don Marsh (USA) |
Argo-Mazda JM16 | Dan Marsh | 602 | 1 | GTP Lights | 45 | 2:01.600 | |
| 11 | 53 | Danny Smith (USA)
Tom Waugh (USA) Diego Febles (PR) |
Mazda RX-7 (Chassis Dynamics) | Roger Mandeville | 599 | 2 | GTO | 56 | 2:05.511 | |
| 12 | 71 | Amos Johnson (USA)
Jack Dunham (USA) Yojiro Terada (J) |
Mazda RX-7 (Highball) | Amos Johnson | 599 | 1 | GTU | 58 | 2:05.828 | |
| 13 | 63 | Jim Downing (USA)
John Maffucci (USA) Yoshimi Katayama (J) |
Argo-Mazda JM16 | Jim Downing | 599 | 2 | GTP Lights | 79 | no time | |
| 14 | 09 | Mike H. Schaefer (USA)
Peter Uria (USA) Jack Refenning (USA) Larry Figaro (USA)^ Ren Tilton (USA)^ |
Porsche 911 Carrera RSR | Peter Uria | 586 | 3 | GTO | 66 | 2:08.738 | |
| 15 | 90 | Andy Petery (USA)
Les Delano (USA) Tommy Riggins (USA) |
Pontiac Firebird | Road Circuit Technology | 578 | 4 | GTO | 27 | 1:54.383 | |
| 16 | 21 | Steve Cohen (USA)
Don Walker (USA) William Gelles (USA) |
Ferrari 512BB | Don Walker | 567 | 5 | GTO | 39 | 2:00.571 | |
| 17 | 6 | Charles Morgan (USA)
Bill Alsup (USA) Jim Miller (USA) Gene Hackman (USA)* |
Royale-Buick RP40 102 | Charles Morgan | 564 | 10 | GTP | 28 | 1:54.563 | |
| 18 | 42 | Scott Pruett (USA)
Paul Lewis (USA) Joe Varde (USA) Rick Ware (USA)^ |
Mazda RX-7 | Mike Meyer | 558 | 2 | GTU | 53 | 2:04.487 | |
| 19 | 99 | Chris Cord (USA)
Dennis Aase (USA) |
Toyota Celica | Dan Gurney | 533 | 3 | GTU | 54 | 2:05.187 | |
| 20 | 92 | Chris Gennone (USA)
Fernando Prego (USA) Hoyt Overbagh (USA) Lewis Fuller (USA) |
Chevrolet Camaro (Stock Car Products) | Hoyt Overbagh | 516 | 6 | GTO | 65 | 2:08.676 | |
| NRF | 11 | Chuck Kendall (USA)
Peter Fitzgerald (USA) John Hotchkis Sr (USA) |
Porsche 935 | Chuck Kendall | 512 | GTP | 30 | 1:56.654 | ||
| NRF | 30 | Gianpiero Moretti (I)
Jim Trueman (USA) Massimo Sigala (I) |
Momo-Alba Ford-Cosworth AR3 | Gianpiero Moretti | 505 | fire | GTP | 19 | 1:50.637 | |
| 23 | 37 | Peter Welter (USA)
Nick Nicholson (USA) Tom Burdsall (USA) |
Tiga-Mazda GT285 | Aerex | 501 | 3 | GTP Lights | 55 | 2:05.282 | |
| NC | 96 | Allan Moffatt (AUS)
Gregg Hansford (AUS) Kevin Bartlett (AUS) Peter McCloud (AUS)^ |
Mazda RX-7 | Allan Moffatt | 482 | 7 | GTO | 41 | 2:01.038 | |
| NC | 94 | William Phalp (USA)
Dennis Winfree (USA) Wally Hopkins (USA) |
Porsche 911 | 49th Star Racing | 477 | 4 | GTU | 75 | 2:11.245 | |
| NC | 73 | Clark Howey (USA)
Dale Koch (USA) Tracy Wolf (USA) |
Chevrolet Camaro | Tracy Wolf | 467 | 8 | GTO | 60 | 2:07.136 | |
| NC | 78 | Raul Garcia (USA)
Eugenio Matienzo (USA) |
Pontiac Firebird (Oftedahl) | Raul Garcia | 454 | 9 | GTO | 59 | 2:05.984 | |
| DNF | 3 | Bobby Allison (USA)
Wayne Pickering (USA) Ken Madren (USA) |
March-Buick 84G | Pegasus Racing | 437 | gearbox | GTP | 20 | 1:50.733 | |
| NC | 83 | Bill Wessel (USA)
Robert Whitaker (USA) Mark Kennedy (USA) Karl Keck (USA) |
Chevrolet Corvette (Pratt) | Karl Keck | 436 | GTO | 47 | 2:02.173 | ||
| NC | 43 | Rusty Schmidt (USA)
Scott Schmidt (USA) Steve Schmidt (USA) Dan Arkins (USA)^ |
Chevrolet Corvette | Starved Rock Lodge | 413 | 11 | GTO | 76 | 2:11.452 | |
| DNF | 35 | Marion L. Speer (USA)
Bobby Hefner (USA) Jack Griffin (USA) |
Porsche 911 Carrera RSR 460 9113 | Dallas | 395 | oil leak | GTO | 64 | 2:08.675 | |
| DNF | 15 | John Kalagian (USA)
John Lloyd (USA) Tommy Grunnah (USA) |
March-Chevrolet 84G | John Kalagian | 394 | suspension | GTP | 10 | 1:47.733 | |
| DNF | 33 | Richard Anderson (USA)
Bard Boand (USA) Mike Brummer (USA) |
Lola-Chevrolet T600 | Bard Boand | 373 | suspension | GTP | 32 | 1:57.076 | |
| NC | 22 | Del Russo Taylor (USA)
John Hayes-Harlow (GB) Bob Lee (USA) Janis Taylor (USA)^ |
Pontiac Firebird (Python) | Walter Johnston | 351 | GTO | 57 | 2:05.610 | ||
| NC | 49 | Albert Naon Jr (USA)
Dennis Vitolo (USA) Fernando Garcia (USA) |
Porsche 911 | Conrod Racing | 336 | GTU | 77 | 2:11.612 | ||
| DNF | 45 | John Paul Jr (USA)
Bill Adam (CDN) Whitney Ganz (USA) |
March-Buick 85G Hawk | Phil Conte | 330 | suspension | GTP | 1 | 1:41.490 | |
| DNF | 80 | Neil Bonet (USA)
Jim Derhaag (USA) Les Lindley (USA) Loren St. Lawrence (USA)^ Jim Miller (USA)* |
Chevrolet Camaro (Lindley) | Les Lindley | 295 | GTO | 33 | 1:57.886 | ||
| DNF | 72 | Harold Shafer (USA)
Tom Nehl (USA) Kent Painter (USA) Nelson Silcox (USA)^ |
Chevrolet Camaro (Riggins) | Centurion Auto Transport | 283 | head gasket | GTO | 40 | 2:00.947 | |
| DNF | 28 | Gary Baker (USA)
Robin McCall (USA) Joe Ruttman (USA) |
Chevrolet Camaro | John Josey | 281 | GTO | 36 | 2:00.128 | ||
| DNF | 0 | Sarel van der Merwe (ZA)
Tony Martin (ZA) Ian Scheckter (ZA) |
March-Porsche 84G | Sarel van der Merwe | 260 | tyre | GTP | 2 | 1:42.308 | |
| DNF | 38 | Takashi Yorino (J)
Logan Blackburn (USA) Roger Mandeville (USA) |
Mazda RX-7 (Chassis Dynamics) | Roger Mandeville | 220 | exhaust | GTO | 62 | 2:07.951 | |
| DNF | 81 | Steve Alexander (USA)
Joe Hill (USA) George Alderman (USA) Carson Baird (USA)* |
Ferrari 308GTB | Mobler Racing | 219 | GTO | 73 | 2:11.065 | ||
| DNF | 89 | Enrique Molins (ES)
Eduardo Galdamez (ES) Andre Bauer (GUA) Kikos Fonseca (CR)* |
Porsche 934 | Enrique Molins | 217 | electrics | GTO | 35 | 1:59.405 | |
| DNF | 55 | Robert Peters (CDN)
George Schwarz (CDN) Andre Schwarz (CDN) |
Mazda RX-7 | Walt Preston | 214 | GTU | 71 | 2:09.952 | ||
| DNF | 76 | Jack Baldwin (USA)
Ira Young (USA) Jeff Kline (USA) |
Mazda RX-7 (Fabcar) | Ira Young | 205 | GTU | 52 | 2:04.295 | ||
| DNF | 44 | Brian Redman (GB)
Bob Tullius (USA) Hurley Haywood (USA) |
Jaguar XJR-5 (Fabcar) | Bob Tullius | 203 | tyre | GTP | 9 | 1:47.003 | |
| DNF | 57 | Steve Zwiren (USA)
Anthony Pio Costa (USA) Michael Allison (USA) Wes Donnington (USA) |
Mazda RX-7 | Steve Zwiren | 188 | fuel system | GTU | 70 | 2:09.557 | |
| DNF | 31 | Hugo Gralia (USA)
Emory Donaldson (USA) Paul Goral (USA) |
Porsche 935 | Paul Goral | 183 | GTP | 63 | 2:08.057 | ||
| DNF | 51 | John McComb (USA)
Rick Mancuso (USA) Fred Fiala (USA) Elliott Forbes-Robinson (USA)* |
Ferrari 512BB 30559 | Warren Mosler | 171 | gearbox | GTO | 37 | 2:00.362 | |
| DNF | 17 | Al Bacon (USA)
Charles Guest (USA) Steve Millen (NZ) |
Mazda RX-7 (Chassis Dynamics) | Al Bacon | 170 | gearbox | GTU | 68 | 2:09.009 | |
| DNF | 4 | Lew Price (USA)
Carson Baird (USA) Billy hagan (USA) Terry Labonte (USA) |
Chevrolet Corvette GTP-T711 (Lola) HU/02 | Lew Price | 160 | gearbox | GTP | 14 | 1:40.756 | |
| DNF | 29 | Darin Brassfielf (USA)
Michael Roe (IRL) Tommy Byrne (USA) David Hobbs (GB)* |
March-Chevrolet 84G | DeAtley Motorsports | 159 | oil system | GTP | 12 | 1:48.290 | |
| DNF | 95 | Lance Van Every (USA)
Ash Tisdelle (USA) Jack Refenning (USA) |
Porsche 935 | Lance Van Every | 157 | oil leak | GTP | 38 | 2:00.364 | |
| DNF | 06 | John Bauer (USA)
Jim Miller (USA) Willy T. Ribbs (USA) John Jones (CDN)^ |
Ford Mustang (Roush) | Jack Roush | 157 | oil system | GTO | 24 | 1:52.427 | |
| DNF | 04 | Claude Ballot-Lena (F)
Jim Adams (USA) Chip Robinson (USA) |
Jaguar XJR-5 (Fabcar) | Bob Tullius | 154 | oil pressure | GTP | 11 | 1:48.039 | |
| DNF | 60 | Tony Swan (USA)
Bob Ruth (USA) Steve Dietrich (USA) Michael Brockman (USA) |
Mazda RX-7 | Hobbit Racing | 150 | accident | GTU | 72 | 2:10.424 | |
| DNF | 54 | David Heinz (USA)
Dave Barnett (USA) Jerry Thompson (USA) Sherrie Rashausen (USA) |
Chevrolet Corvette (Dillon) | David Heinz | 138 | GTO | 51 | 2:03.807 | ||
| DNF | 66 | Bob Beasley (USA)
Jack Lewis (USA) Chuck Grantham (USA) |
Porsche 911 Carrera | Bob Beasley | 118 | accident | GTO | 48 | 2:02.349 | |
| DNF | 68 | Pete Halsmer (USA)
John Morton (USA) Dieter Quester (A) |
Porsche 962 108 | Jim Busby | 107 | engine | GTP | 16 | 1:49.602 | |
| DNF | 86 | Thierry Boutsen (B)
Bruce Leven (USA) Henri Pescarolo (F) |
Porsche 962 101 | Bruce Leven | 101 | accident | GTP | 7 | 1:46.133 | |
| DNF | 97 | Billy Scyphers (USA)
Allen Glick (USA) Bill Cooper (USA) |
Chevrolet Corvette (Hohstadt) | Billy Scyphers | 99 | accident | GTO | 25 | 1:53.929 | |
| DNF | 25 | Kenper Miller (USA)
David Cowart (USA) Mauricio de Narvaez (CO) |
March-Chevrolet 83G 3 | David Cowart | 92 | accident | GTP | 18 | 1:50.041 | |
| DNF | 87 | Elliott Forbes-Robinson (USA)
John Schneider (USA) Don Istook (USA) |
Porsche 924 Carrera | John Schneider | 89 | accident | GTU | 49 | 2:02.388 | |
| DNF | 58 | Jim Torres (USA)
Don Kravig (USA) Michael Hammond (USA) Rick Borlase (USA)^ |
Porsche 934 | Coin Operated Racing | 86 | GTO | 43 | 2:01.158 | ||
| DNF | 13 | Frank Rubina (USA)
Dennis Wagoner (USA) Ken Knott (USA) David Leira (USA)* |
Mazda RX-7 (Chassis Dynamics) | Frank Rubino | 67 | axle | GTU | 67 | 2:08.838 | |
| DNF | 20 | Freddy Baker (USA)
Don Herman (USA) Rich Maher (USA) Dick Silver (USA)^ |
Porsche 935 | Spirit of Cleveland | 62 | turbocharger | GTP | 46 | 2:02.135 | |
| DNF | 70 | Don Cummings (USA)
Craig A. Rubright (USA) Greg Walker (USA)^ |
Chevrolet Corvette (Linderfer) | Don Cummings | 58 | engine | GTO | 50 | 2:02.951 | |
| DNF | 07 | Lyn St. James (USA)
Tim CoConis (USA) Eric Lang (USA) |
Argo Ford-Cosworth JM16 100 | Lyn St. James | 54 | gearbox | GTP | 22 | 1:51.116 | |
| DNF | 08 | Drake Olson (ZA)
Steve Potter (USA) Willard Howe (USA) Paul Romano (USA)^ |
Mazda RX-7 | Simms/Romano | 45 | GTU | 61 | 2:07.933 | ||
| DNF | 77 | David Wallace (USA)
John Petrick (USA) Don Sikes (USA) |
Mazda RX-7 | Championship Motorsports | 36 | fire | GTU | 69 | 2:09.514 | |
| DNF | 47 | Walt Bohren (USA)
Ron Bauchard (USA) Billy Dingman (USA)^ |
Pontiac Firebird | Billy Dingman | 35 | GTO | 78 | no time | ||
| DNF | 41 | Luis Sereix (USA)
Ralph Noseda (USA) |
Pontiac Firebird | Unlimited Telephones | 28 | fuel system | GTO | 44 | 2:01.447 | |
| DNF | 84 | Clay Young (USA)
Lake Speed (USA)* Ron Grable (USA)* |
Pontiac Fiero (Huffaker) | Clay Young | 21 | engine | GTU | 80 | no time | |
| DNF | 16 | Harald Grohs (D)
Preston Henn (USA)^ Jean-Louis Schlesses (F)^ Walter Brun (CH)^ |
Porsche 935L (Andial) 002 | Preston Henn | 15 | GTP | 23 | 1:52.053 | ||
| DNF | 61 | Steve Shelton (USA)
Don Courtney (USA) Brent O'Neill (USA) |
Royale Ford-Cosworth RP40 | Team USA | 14 | clutch | GTP | 17 | 1:49.777 | |
| DNF | 74 | Paul Gentilozzi (USA)
Kent Hill (USA)^ Austin Godsey (USA)^ Bob Akin (USA)^ |
Porsche 924 Carrera | Paul Gentilozzi | 12 | cooling system | GTU | 74 | 2:11.226 | |
| DNS | 88 | Bruce Leven (USA)
Henri Pescarolo (F) Thierry Boutsen (B) |
Porsche 962 109 | Bruce Leven | GTP | 8 | 1:46.433 | |||
| DNS | 19 | Jack Miller (USA)
Carlos Ramirez (USA) Bruce Redding (USA) |
Nimrod-Aston Martin C2 | Performance motorcar | GTP | 31 | 1:56.950 | |||
| DNS | 64 | Ernesto Soto (YV)
Rene Rodriguez (USA) |
Chevrolet Corvette | rene Rodriguez | GTO | 34 | 1:59.170 | |||
| DNS | 05 | Tico Almeida (USA)
Miguel Morejon (USA) Gabriel Riano (USA)* |
Porsche 935 | Bill McDill | GTP | 42 | 2:01.112 | |||
| DNQ | 24 | Dale Kreider (USA)
Roy Newsome (USA) |
Chevrolet Camaro (Riggins) | Dale Kreider | GTO | 2:10.150 | ||||
| DNQ | 34 | Alfredo Mena (ES)
George Drolsom (USA) Margie Smith-Haas (USA)* |
Porsche 924 Carrera | El Salvador Racing | GTU | 2:13.551 | ||||
| DNQ | 02 | Roy Newsome (USA)
Dale Kreider (USA) |
Mazda RX-7 (Chassis Dynamics) | Dale Kreider | GTU | 2:14.407 | ||||
| DNQ | 23 | Alan Howes (USA)
Paul Reisman (USA) Bob Hebert (USA) |
Porsche 911 Carrera RSR | Peter Magnuson | GTO | 2:15.601 | ||||
| DNQ | 69 | John Hofstra (USA)
Charles Slater (USA) |
Porsche 911 Carrera | John Hoftsra | GTO | 2:17.238 | ||||
| DNQ | 79 | Tom Winters (USA)
Bob Bergstrom (USA) John Casey (USA) |
Porsche 924 Carrera | Paul Gentilozzi | GTU | 2:29.091 | ||||
| DNS | 00 | Jim Logan (USA)
Graham McRae (NZ) Leonard Yanke (USA) Phillips (USA) |
Dodge Daytona | Jim Logan | GTP | |||||
| DNS | 27 | Russell Gossett (USA)
Gary Stephens (USA) Paul Wolfe (USA) Michael Gassaway (USA)* Gary Brown (USA)* |
Datsun 280Z | Paul Fortner | GTU | |||||
| DNS | 85 | Emerson Fittipaldi (BR)
Tony Garcia (USA) Mauricio de Narvaez (CO) |
March-Buick 85G Hawk | Ralph Sanchez | GTP | |||||
| DNA | 10 | Jim Leeward (USA)
Emory Donaldson (USA) |
March-Chevrolet 82G | Jim Leeward | GTP | |||||
| DNA | 12 | J. Robert Johnson (USA)
Juan Manuel Fangio II (RA) Patty Moise (USA) George Wilkie (USA) |
Osella-BMW PA10 IMSA01 | Werner Frank | GTP Lights | |||||
| DNA | 18 | Francisco Miguel (ES) | Sauber-Chevrolet C7 | Francisco Miguel | GTP | |||||
| DNA | 26 | Mario Capone (USA)
Vic Sanchez (USA) |
Chevrolet Corvette | Spot Master | GTO | |||||
| DNA | 36 | Ron Case (USA)
Dave Panaccione (USA) Craig Case (USA) |
Porsche 911 | Ron Case | GTU | |||||
| DNA | 39 | Ricardo Londono (CO)
Pedro Cardenas (USA) |
Pontiac Firebird | Ricardo Londono | GTO | |||||
| DNA | 46 | Billy Dingman (USA)
Walt Bohren (USA) Ron Bouchard (USA) |
Pontiac Firebird | Billy Dingman | GTO | |||||
| DNA | 48 | Gary Wonzer (USA)
Bruce Dewey (USA) Buzz Cason (USA) |
Porsche 934 | Gary Wonzer | GTO | |||||
| DNA | 50 | Buz McCall (USA)
Tom Sheehy (USA) |
Chevrolet Camaro | Monty's Trainer | GTO | |||||
| DNA | 52 | Don Nooe (USA)
Jim Stricklin (USA) Edwin D. Martin (USA) |
Chevrolet Corvette | Don Nooe | GTO | |||||
| DNA | 56 | Herb Adams (USA)
David Smith (USA) Dean Hills (USA) |
Pontiac Firebird | Herb Adams | GTO | |||||
| DNA | 62 | Pontiac Firebird | Gordon Oftedahl | GTO | ||||||
| DNA | 66 | Manuel Lopez (PE)
Julio Cesar de La Casas (PE) |
Ford Escort | Manuel Lopez | GTU | |||||
| DNA | 82 | Gaston Andrey (USA) | Tiga-Mazda | Gaston Andrey | GTP Lights | |||||
| DNA | 84 | Michael Gassaway (USA)
Gary Brown (USA) Russell Gossett (USA) |
Datsun 280Z | Paul Fortner | GTU | |||||
| DNA | 96 | Paul Goral (USA) | Porsche 935 | Paul Goral | GTP | |||||
| DNA | 98 | Ken Bupp (USA)
Guy W. Church (USA) E.J.Generotti (USA) |
Chevrolet Camaro (Riggins) | Ken Bupp | GTO | |||||
| DNA | 32 | Rondeau-Chevrolet M382 | Paul Goral | GTP |
| Winning Time: 24h01m36.240, 104.162 mph/167.333 kph |
| Fastest Lap: Al Holbert #14 (Porsche 962), 1m48.435, 118.191 mph/190.209 kph |
| * Driver entered for car, but never drove it at meeting |
| ^ Driver practiced car, but did not race it |
| RES - Reserve (Practiced, on standy-by for start) |
| REE - Reserve Entry |
| DNA - Did Not Arrive |
| DNS - Did Not Start |
| DNF - Did Not Finish |
| DNP - Did Not Practice |
| NC - Not Classified |
| DSQ - Disqualified |
| NRF - Not Running At Finish |
| NAC - Not Accepted |
| REJ - Rejected (Did not pass scrutineering) |