| Pos. | No. | Driver / Nationality | Car | Entrant | Laps | Time/retired | Grp Pos | Group | Grid | Qual Time |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | Bob Wollek (F)
Claude Ballot-Lena (F) Preston Henn (USA) A.J.Foyt (USA) |
Porsche 935L Andial 002 | Preston Henn | 618 | 1 | GTP | 1 | 1:42.155 | |
| 2 | 88 | Terry Wolters (USA)
Randy Lanier (USA) Marty Hinze (USA) Ken Murray (USA)^ |
March-Chevrolet 83G | Motorsport Marketing | 612 | 2 | GTP | 15 | 1:51.524 | |
| 3 | 7 | Pete Halsmer (USA)
Bob reed (USA) Rick Knoop (USA) Tom Gloy (USA)* |
Mazda RX-7 | Mederer/Oku | 598 | 1 | GTO | 24 | 1:56.421 | |
| 4 | 24 | Marion L. Speer (USA)
Ken Madren (USA) Ray Ratcliff (USA) |
Porsche 935 | Pegasus Racing | 578 | 3 | GTP | 16 | 1:51.945 | |
| 5 | 50 | Diego Febles (PR)
Kikos Fonseca (CR) Roy Valverde (CR) |
Porsche 911 Carrera RSR | Diego Febles | 568 | 2 | GTO | 58 | 2:05.887 | |
| 6 | 10 | Ralph Kent-Cooke (USA)
Jim Adams (USA) John Bright (GB) Dana Leung (J)^ Terry Wolters (USA)* |
Lola-Chevrolet T600 | Ralph Kent-Cooke | 563 | 4 | GTP | 6 | 1:49.998 | |
| 7 | 05 | Tico Almeida (USA)
Miguel Morejon (USA) Ernesto Soto (YV) |
Porsche 911 Carrera RSR | Almeida/Rodriguez | 561 | 3 | GTO | 36 | 2:02.315 | |
| 8 | 77 | Walt Bohren (USA)
Pierre Honegger (USA) David Palmer (GB) |
Mazda GTP Rosemont | Pierre Honegger | 553 | 5 | GTP | 32 | 1:59.656 | |
| 9 | 9 | Wayne Baker (USA)
Jim Mullen (USA) Bob Garretson (USA) |
Porsche 934 009 0030 | Wayne Baker | 551 | 4 | GTO | 52 | 2:04.892 | |
| 10 | 35 | Paul Gilgan (USA)
Al Leon (USA) Wayne Pickering (USA) |
Porsche 911 Carrera RSR 460 9113 | Pegasus Racing | 547 | 5 | GTO | 56 | 2:05.642 | |
| 11 | 47 | Frank Rubino (USA)
Pepe Romero (USA) Doc Bundy (USA) Dale Whittington (USA) |
Porsche 935 | Frank Rubino | 546 | 6 | GTP | 3 | 1:46.976 | |
| 12 | 92 | Lee Mueller (USA)
Hugh McDonough (USA) Terry Visger (USA) |
Mazda RX-7 | Dave Kent | 544 | 1 | GTU | 34 | 2:01.367 | |
| 13 | 58 | Kathy Rude (USA)
Deborah Gregg (USA) Bonnie Henn (USA) |
Porsche 924 Carrera | Brumos Porsche | 531 | 6 | GTO | 35 | 2:01.480 | |
| 14 | 90 | Mike H. Schoefer (USA)
Jack Refenning (USA) John Belperche (USA) Doug Zitze (USA) |
Porsche 911 | Peter Uria | 525 | 2 | GTU | 70 | 2:10.076 | |
| 15 | 61 | Brent O'Neill (USA)
Don Courtney (USA) Luis Sereix (USA) |
Chevrolet Monza | Vista Racing | 525 | 7 | GTO | 31 | 1:59.081 | |
| NRF | 86 | Hurley Haywood (USA)
Bruce Leven (USA) Al Holbert (USA) |
Porsche 935-80 | Bruce Leven | 515 | wheel | GTP | 5 | 1:47.929 | |
| 17 | 60 | Steve Dietrich (USA)
Chris Ivey (USA) Jim Cook (USA) |
Mazda RX-7 | Tommy Morrison | 514 | 3 | GTU | 67 | 2:07.930 | |
| 18 | 85 | Richard Lloyd (GB)
George Drolsom (USA) Jonathan Palmer (GB) |
Porsche 924 Carrera | Richard Lloyd | 500 | 8 | GTO | 29 | 1:58.274 | |
| 19 | 38 | Roger Mandeville (USA)
Amos Johnson (USA) Danny Smith (USA) |
Mazda RX-7 | Roger Mandeville | 476 | 4 | GTU | 79 | no time | |
| 20 | 4 | Billy Hagan (USA)
Terry Labonte (USA) Lloyd Frink (USA) Gene Felton (USA)* Tom Williams (USA)* |
Chevrolet Camaro Frings | Billy Hagan | 467 | 9 | GTO | 10 | 1:50.742 | |
| 21 | 63 | Jim Downing (USA)
John Maffucci (USA) Steve Potter (USA) |
Mazda RX-7 | Jim Downing | 466 | 5 | GTU | 42 | 2:03.563 | |
| 22 | 29 | Robert Overby (USA)
Chris Doyle (USA) Don Bell (USA) |
Chevrolet Camaro | Robert Overby | 438 | 10 | GTO | 40 | 2:02.854 | |
| 23 | 37 | Tom Burdsall (USA)
Peter Welter (USA) Al Bacon (USA) Jack Refenning (USA)* |
Mazda RX-7 | Burdsall/Welter | 436 | 6 | GTU | 60 | 2:06.018 | |
| DNF | 26 | Tom Nehl (USA)
Nelson Silcox (USA) Richard J. Valentine (USA) |
Chevrolet Camaro Riggins | Auriga Racing | 426 | accident | GTO | 70 | 1:54.340 | |
| DNF | 1 | John Paul Jr (USA)
Rene Rodriguez (USA) Joe Castellano (USA) |
Porsche 935 JLP-4 Fabcar | John Paul Sr | 412 | turbocharger | GTP | 2 | 1:46.345 | |
| DNF | 13 | Duane Eitel (USA)
Mike Brummer (USA) Phillip Pate (USA) |
Pontiac Firebird | Gordon Oftedahl | 411 | engine | GTO | 18 | 1:53.658 | |
| NC | 28 | Herb Adams (USA)
John Martin (USA) Joe Ruttman (USA) Leonard Emanuelson (USA) Mike Meldeau (USA)^ |
Avanti II Dillon | Avanti | 410 | GTO | 14 | 1:51.477 | ||
| NC | 40 | Uli Bieri (CDN)
Matt Gysler (CDN) Duff Hubbard (USA) |
BMW M1 | Uli Bieri | 406 | GTO | 33 | 2:00.920 | ||
| NC | 97 | Wally Dallenbach Jr (USA)
Willy T. Ribbs (USA) Whitney Ganz (USA) |
Toyota Celica | Dan Gurney | 365 | GTU | 63 | 2:06.475 | ||
| NC | 75 | Bard Boand (USA)
Richard Anderson (USA) Mike Stephens (USA) |
Chevrolet Corvette | Bard Boand | 358 | GTO | 38 | 2:02.713 | ||
| DNF | 83 | Michael Gassaway (USA)
Scott Smith Sr (USA) Joe Cogbill Sr (USA) Joe Cogbill Jr (USA) |
Chevrolet Camaro | Thomas T. Ciccone | 357 | gearbox | GTP | 65 | 2:06.934 | |
| NC | 52 | Tom Cripe (USA)
Dick Gauthier (USA) David Duncan (USA) Jack Swanson (USA) |
Porsche 911 | TFC Racing | 312 | GTU | 76 | 2:15.790 | ||
| DNF | 71 | Charles Morgan (USA)
Bill Johnson (USA) Jim Miller (USA) |
Datsun 280ZX | Charles Morgan | 305 | engine | GTU | 61 | 2:06.217 | |
| DNF | 27 | Jim Fowells (USA)
Ray Mummery (USA) Tom Sheehy (USA) |
Mazda RX-7 | Jim Fowells | 300 | accident | GTU | 69 | 2:08.558 | |
| DNF | 78 | Klaus Bitterauf (USA)
Vicki Smith (USA) Scott Flanders (USA) |
Porche 911 | Klaus Bitteraud | 299 | engine | GTU | 75 | 2:14.843 | |
| DNF | 65 | Carson Baird (USA)
Chip Mead (USA) Tom Pumpelly (USA) |
Ferrari 512BB 38179 | Ron Spangler | 294 | engine | GTP | 21 | 1:55.925 | |
| DNF | 23 | Raul Garcia (USA)
Vince DiLella (USA) Armando Fernandez (USA) |
Chevrolet Camaro Superior | Raul Garcia | 285 | accident | GTO | 81 | no time | |
| NC | 01 | John Morton (USA)
Tom Klausler (USA) Ronnie Bucknum (USA) |
Ford Mustang | Marketing Corporation | 284 | GTO | 49 | 2:04.450 | ||
| DNF | 72 | Gary Baker (USA)
Sterling Marlin (USA) |
Chevrolet Corvette | John Josey | 284 | accident | GTO | 77 | 2:16.407 | |
| NC | 41 | Rusty Schmidt (USA)
Scott Schmidt (USA) Steve Schmidt (USA)* |
Chevrolet Corvette | Starved Rock Lodge | 263 | GTO | 37 | 2:02.428 | ||
| NC | 49 | Hoyt Overbagh (USA)
Peter Kirill (USA) David Price (USA) |
Chevrolet Monza Rickets | Hoyt Overbagh | 243 | GTO | 50 | 2:04.482 | ||
| DNF | 66 | Jack Dunham (USA)
Jeff Kline (USA) Jon Compton (USA) |
Mazda RX-7 | Dunham/Meyer | 242 | engine | GTU | 43 | 2:03.603 | |
| DNF | 45 | Gene Felton (USA)
Tom Williams (USA) Lloyd Frink (USA) Billy Hagan (USA)* Terry Labonte (USA)* |
Chevrolet Camaro Frings | Billy Hagan | 223 | accident damage | GTO | 9 | 1:50.593 | |
| DNF | 21 | Lyn St. James (USA)
John Graham (CDN) Drake Olson (ZA) |
Nimrod-Aston Martin C2 003 | Nimrod | 208 | engine | GTO | 12 | 1:49.396 | |
| DNF | 79 | Tom Winters (USA)
Bob Bergstrom (USA) Peter Dawe (USA) |
Porsche 924 Carrera | Paul Gentilozzi | 193 | engine | GTO | 62 | 2:06.382 | |
| DNF | 55 | Diego Montoya (CO)
Terry Herman (USA) Tony Garcia (USA) ALbert Naon (USA)* |
BMW M1 | B de T Racing | 172 | ignition | GTP | 25 | 1:57.202 | |
| DNF | 14 | Bob Raub (USA)
Sam Moses (USA) Carl Shafer (USA) |
Pontiac Firebird | Gordon Oftedahl | 165 | engine | GTO | 17 | 1:53.179 | |
| DNF | 16 | Paul Goral (USA)
Larry Figaro (USA) Nort Northam (USA) |
Porsche 911 | Paul Goral | 161 | engine | GTU | 80 | no time | |
| DNF | 74 | Del Russo Taylor (USA)
Mike Angus (USA) Wayne Dassinger (USA) |
Chevron-Buick GTP | Mark Wagoner | 152 | engine | GTP | 48 | 2:04.343 | |
| DNF | 44 | Bob Tullius (USA)
Bill Adam (CDN) Pat Bedard (USA) |
Jaguar XJR-5 Fabcar | Bob Tullius | 130 | accident damage | GTP | 7 | 1:49.323 | |
| DNF | 98 | Dennis Aase (USA)
Al Unser Jr (USA) Michael Chandler (USA) |
Toyota Celica | Dan Gurney | 130 | gearbox | GTU | 39 | 2:02.764 | |
| DNF | 89 | Enrique Molins (ES)
Eduardo Galdamez (ES) Eduardo Barrientos (ES) |
Porsche 911 Carrera RSR | Taca | 122 | accident | GTO | 68 | 2:08.415 | |
| DNF | 31 | Dale Kreider (USA)
Dick Neland (USA) Ed Kuhel (USA)^ |
Chevrolet Camaro | Kendco | 122 | engine | GTO | 64 | 2:06.901 | |
| DNF | 11 | A.J.Foyt (USA)
Darrell Waltrip (USA) Guillermo Maldonardo (RA) Tiff Needell (GB)^ |
Nimrod-Aston Martin C2 002 | Nimrod | 121 | engine | GTP | 13 | 1:50.000 | |
| DNF | 67 | Elliott Forbes-Robinson (USA)
Gary Witzenburg (USA) Tony Swan (USA) Kyle Petty (USA)* |
Pontiac Firebird | Trans Am Specialities | 121 | engine | GTO | 66 | 2:07.185 | |
| DNF | 42 | Bill Bean (USA)
Buzz Cason (USA) Gary Wonzer (USA) John Robinson (USA)* |
Porsche 911 | Gary Wonzer | 118 | gearbox | GTU | 73 | 2:12.364 | |
| DNF | 99 | Gene Hackman (USA)
Masanori Sekiya (J) Koaru Hoshino (J) |
Toyota Celica | Dan Gurney | 118 | gearbox | GTU | 57 | 2:05.666 | |
| DNF | 64 | John E. Hulen (USA)
Ron Coupland (USA) Bob Speakman (USA) |
Porsche 911 Carrera RSR | John E. Hulen | 118 | electrics | GTO | 46 | 2:04.146 | |
| DNF | 15 | Doug Lutz (USA)
Dave Panaccione (USA) Larry Connor (USA) Fernando Prego (USA) |
Porsche 911 Carrera RSR | Doug Lutz | 113 | flywheel | GTO | 59 | 2:05.906 | |
| DNF | 81 | Robert Whitaker (USA)
Bill McDill (USA) Karl Keck (USA) |
Chevrolet Camaro | Robert Whitaker | 98 | gearbox | GTO | 51 | 2:04.513 | |
| DNF | 36 | Paul Miller (USA)
Jim Busby (USA) Ron Grable (USA) |
Porsche 924 Carrera | Herman/Miller | 91 | engine | GTO | 30 | 1:58.742 | |
| NC | 06 | Bobby Diehl (USA)
Roy Newsome (USA) |
Mazda RX-7 | Bobby Diehl | 87 | GTO | 71 | 2:11.342 | ||
| DNF | 43 | Bob Richardson (USA)
Bob Young (USA) Bob Gregg (USA)^ |
Chevrolet Camaro | Bob Gregg | 85 | gearbox | GTO | 27 | 1:57.779 | |
| DNF | 04 | Paul Canary (USA)
Jean-Paul Libert (B) Pascal Witmeur (B) Roger Carmillet (F)^ |
Pontiac Firebird Watson | Paul Canary | 85 | accident | GTO | 22 | 1:56.064 | |
| DNF | 32 | Richard Cline (USA)
Paul Romano (USA) Mike Powell (USA) |
Mazda RX-7 | Richard Cline | 82 | axle | GTU | 72 | 2:11.500 | |
| DNF | 84 | Emory Donaldson (USA)
Steve Pope (USA) Ken Murray (USA) |
Chevrolet Camaro | Motorsport Marketing | 79 | gearbox | GTO | 26 | 1:57.527 | |
| DNF | 07 | Ludwig Heimrath (CDN)
Ludwig Heimrath Jr (CDN) |
Porsche 934 | Ludwig Heimrath | 71 | oil leak | GTO | 23 | 1:56.379 | |
| DNF | 30 | Jack Rynerson (USA)
Ron Case (USA) Craig Case (USA)* |
Porsche 911 | Ron Case | 67 | engine | GTU | 74 | 2:14.204 | |
| DNF | 51 | Doug Carmean (USA)
Don Herman (USA) John Finger (USA) |
Mazda RX-7 | Jim Trueman | 57 | accident | GTU | 53 | 2:05.105 | |
| DNF | 82 | Joe Varde (USA)
John Casey (USA) Jack Bladwin (USA)^ |
Mazda RX-7 | Trinity Racing | 52 | engine | GTU | 47 | 2:04.274 | |
| DNF | 87 | Bob Beasley (USA)
John Ashford (USA) Jack Lewis (USA)^ |
Porsche 911 Carrera R | Bob Beasley | 52 | engine | GTO | 45 | 2:03.942 | |
| DNF | 0 | Ted Field (USA)
Bill Whittington (USA) Danny Ongais (USA)^ |
Lola-Chevrolet T600 | Ted Field | 47 | turbocharger | GTP | 11 | 1:47.554 | |
| DNF | 5 | Bob Akin (USA)
John O'Steen (USA) Dale Whittington (USA)^ |
Porsche 935K3 Kremer | Bob Akin | 43 | accident | GTP | 4 | 1:47.140 | |
| DNF | 03 | Angelo Pallavicini (CH)
Werner Frank (USA) |
Porsche 935 | Angelo Pallavicini | 24 | engine | GTP | 28 | 1:58.273 | |
| DNF | 02 | Milt Minter (USA)
Ronnie Bucknum (USA) |
Ford Mustang | Marketing Corporation | 24 | oil leak | GTO | 55 | 2:05.559 | |
| DNF | 8 | John Paul Sr (USA)
Phil Currin (USA)^ |
Porsche 935 JLP-3 Gaaco | John Paul Sr | 15 | withdrew | GTP | 41 | 2:03.053 | |
| DNF | 25 | David Cowart (USA)
Kenper Miller (USA) Mauricio de Narvaez (CO)^ |
March-Porsche 82G | David Cowart | 14 | driveshaft | GTP | 78 | no time | |
| DNF | 09 | Thomas T. Ciccone (USA)
Vic Shinn (USA)^ Joe Cogbill Sr (USA)^ Scott Smith Sr (USA)* Michael Gassaway (USA)* |
Chevrolet Camaro | Mike Gassaway | 6 | engine | GTO | 54 | 2:05.479 | |
| DNF | 19 | Lance Van Every (USA)
Ash Tisdelle (USA)^ Bill Warner (USA)* |
Porsche 911 Carrera RSR | Lance Van Every | 0 | accident | GTO | 44 | 2:03.708 | |
| DNS | 00 | Ted Field (USA)
Danny Ongais (USA) Bill Whittington (USA) |
Lola-Chevrolet T600 | Ted Field | fire | GTP | 8 | 1:50.524 | ||
| DNS | 2 | Marty Hinze (USA) | Porsche 935 930 770 0960 | Marty Hinze | GTP | 19 | 1:54.289 | |||
| DNS | 17 | Billy Dungman (USA)
Roger Bighouse (USA) John Gunn (UsA) |
Chevrolet Corvette | Billy Dingham | GTO | |||||
| DNS | 18 | Vincent P. Collins (USA)
Bill Nelson Sr (USA) Lojza Vosta (USA) |
Pontiac Firebird | Billy Nelson Sr | GTO | |||||
| DNS | 20 | Dale Kreider (USA)
David Heinz (USA) |
Chevrolet Corvette | Dale Kreider | GTO | |||||
| DNS | 39 | Donald Flores (USA)
Robert Gottfired (USA) Howdy Holmes (USA) |
Porsche 911 | Donald Flores | GTU | |||||
| DNS | 69 | Ricardo Londono (CO)
Diego Londono (CO) Fred Flaquer (USA) |
Porsche 911 | Conrado Casado | GTU | |||||
| DNS | 73 | Ken Grostic (USA)
Keith Lawhorn (USA) |
Porsche 914 | G.O.Racing | GTU | |||||
| DNA | 3 | Fred Stiff (USA) | Grid Ford-Cosworth Plaza S1 | Ian Dawson | GTP | |||||
| DNA | 12 | Les Blackburn (GB)
Roy Baker (GB) David Palmer (GB) |
Harrier-Mazda LR4 | Les Blackburn | GTP | |||||
| DNA | Don Courtney (USA)
Brent O'Neill (USA) Luis Sereix (USA) |
Buick Skylark | Vista Racing | GTO | ||||||
| DNA | 22 | Nimrod-Aston Martin C2 | Nimrod | GTP | ||||||
| DNA | 80 | Pontiac Firebird | Charles Kleinschmidt | GTO |
| Winning Time: 24h01m27.025, 98.781 mph/158.972 kph |
| Fastest Lap: Bob Wollek #6 (Porsche 935L), 1m49.22, 126.570 mph/203.695 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) |