| Pos. | No. | Driver / Nationality | Car | Entrant | Laps | Time/retired | Grp Pos | Group | Grid | Qual Time |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 8 | A.J.Foyt (USA)
Bob Wollek (F) John Paul Jr (USA)* |
Porsche 962 104 | Preston Henn | 281 | 12h00m06.858 | 1 | GTP | 13 | 2:27.472 |
| 2 | 14 | Al Holbert (USA)
Derek Bell (GB) Al Unser Jr (USA) |
Porsche 962 103 | Al Holbert | 277 | 2 | GTP | 2 | 2:16.318 | |
| 3 | 68 | Pete Halsmer (USA)
Rick Knoop (USA) Dieter Quester (A) |
Porsche 962 105 | Jim Busby | 268 | 3 | GTP | 12 | 2:24.729 | |
| 4 | 44 | Bob Tullius (USA)
Chip Robinson (USA) Jim Adams (USA)* |
Jaguar XJR-5 (Fabcar) | Bob Tullius | 259 | 4 | GTP | 3 | 2:17.185 | |
| 5 | 63 | Jim Downing (USA)
John Maffucci (USA) |
Argo-Mazda JM16 | Jim Downing | 253 | 1 | GTP Lights | 18 | 2:36.281 | |
| 6 | 65 | Wally Dallenbach Jr (USA)
John Jones (CDN) Willy T. Ribbs (USA)* |
Ford Mustang (Roush) | Jack Roush | 251 | 1 | GTO | 49 | no tiime | |
| 7 | 2 | Al Leon (USA)
Art Leon (USA) Skeeter McKitterick (USA) |
March-Porsche 85G | Leon Brothers | 250 | 5 | GTP | 10 | 2:23.158 | |
| 8 | 11 | Chuck Kendall (USA)
John Hotchkis Sr (USA) Robert Kirby (USA) |
Porsche 935 | Chuck Kendall | 240 | 6 | GTP | 46 | 2:55.702 | |
| 9 | 90 | Les Delano (USA)
Andy Petery (USA) Patty Moise (USA) |
Pontiac Firebird | Road Circuit Technology | 239 | 2 | GTO | 40 | 2:52.741 | |
| 10 | 09 | Peter Uria (USA)
Mike H. Schaefer (USA) Larry Figaro (USA) Jack Refenning (USA) |
Porsche 911 Carrera RSR | Peter Uria | 237 | 3 | GTO | 41 | 2:53.234 | |
| 11 | 61 | Don Courtney (USA)
Brent O'Neill (USA) Mike Hackney (USA) |
Chevrolet Monza | Deco Sales Associates | 231 | 4 | GTO | 34 | 2:48.106 | |
| 12 | 89 | Enrique Molins (ES)
Kikos Fonseca (CR) Alfredo Mena (ES) |
Porsche 934 | Enrique Molins | 219 | 5 | GTO | 31 | 2:45.584 | |
| NRF | 53 | Danny Smith (USA)
Tom Waugh (USA) |
Mazda RX-7 (Chassis Dynamics) | Roger Mandeville | 218 | GTO | 32 | 2:45.126 | ||
| 14 | 37 | Tom Burdsall (USA)
Peter Welter (USA) Nick Nicholson (USA) |
Tiga-Mazda GT285 | Aerex | 216 | 2 | GTP Lights | 33 | 2:46.031 | |
| 15 | 56 | Gary Auberlen (USA)
Peter Jauker (USA) Adrian Gang (USA) Cary Eisenlohr (USA) |
Porsche 911 | Gary Auberlen | 209 | 1 | GTU | 61 | no time | |
| 16 | 93 | Kelly Marsh (USA)
Ron Pawley (USA) Don Marsh (USA) |
Argo-Mazda JM16 | Don Marsh | 205 | 3 | GTO Lights | 23 | 2:40.547 | |
| 17 | 31 | Paul Goral (USA)
Rick Wilson (USA) |
Porsche 935 | Paul Goral | 204 | 7 | GTP | 51 | no time | |
| NRF | 39 | Rainer Brezinka (CDN)
John M. Centano (CDN) Fritz Hochreuter (CDN) |
Porsche 911 Carrera RSR | Rainer Brezinka | 202 | GTO | 57 | no time | ||
| 19 | 00 | Tommy Kendall (USA)
Bart Kendall (USA) Max Jones (USA) Jim Cook (USA)* |
Mazda RX-7 | Tommy Kendall | 202 | 2 | GTU | 53 | no time | |
| NRF | 58 | Rick Borlase (USA)
Michael Hammond (USA) Jim Torres (USA) |
Porsche 934 | Coin Operated Racing | 198 | suspension | GTO | 28 | 2:43.597 | |
| NC | 34 | Larry O'Brien (USA)
Mike Van Steenbug (USA) |
Mazda OVS-1 (Dillon) | Import Service Center | 184 | 4 | GTP Lights | 59 | no time | |
| NC | 98 | Bob Lee (USA)
Bill Julian (USA) |
Buick Skyhawk | Bob Lee | 182 | 9 | GTO | 69 | no time | |
| NC | 20 | Dick Silver (USA)
Don Herman (USA) Freddy Baker (USA) |
Porsche 935 | Spirit of Cleveland | 182 | GTP | 22 | 2:39.013 | ||
| DNF | 38 | Roger Mandeville (USA)
Logan Blackburn (USA) |
Mazda RX-7 (Chassis Dynamics) | Roger Mandeville | 180 | suspension | GTO | 30 | 2:44.294 | |
| NC | 35 | Jack Griffin (USA)
Bobby Hefner (USA) Marion L. Speer (USA) |
Porsche 911 Carrera RSR 460 9113 | Dallas | 178 | 3 | GTU | 73 | no time | |
| DNF | 67 | Jim Busby (USA)
John Morton (USA) Jochen Mass (D) |
Porsche 962 106 | Jim Busby | 175 | accident | GTP | 6 | 2:19.425 | |
| DNF | 15 | John Kalagian (USA)
John Lloyd (USA) Tommy Grunnah (USA) |
March-Chevrolet 84G | John Kalagian | 170 | gearbox | GTP | 8 | 2:20.305 | |
| NC | 36 | Ron Case (USA)
Dave Panaccione (USA) Chris Dembs (USA)* |
Porsche 911 | Ron Case | 165 | 4 | GTU | 55 | no time | |
| NC | 83 | Karl Keck (USA)
Bill Wessel (USA) Mark Montgomery (USA) Mark Kennedy (USA)* |
Chevrolet Corvette (Pratt) | Karl Keck | 158 | 11 | GTO | 39 | 2:51.242 | |
| DNF | 43 | Mauricio de Narvaez (CO)
David Cowart (USA) Kenper Miller (USA) |
Porsche 935J (Joest) 77-003 | Mauricio de Narvaez | 157 | engine | GTP | 16 | 2:33.028 | |
| NC | 02 | Roy Newsome (USA)
Bill McVey (USA) Dale Kreider (USA) |
Mazda RX-7 (Chassis Dynamics) | Dale Kreider | 148 | 5 | GTU | 47 | 2:56.449 | |
| DNF | 88 | J. Craig Shafer (USA)
George R. Shafer (USA) Joseph Maloy (USA) |
Chevrolet Camaro (Banjo's Performance) | George R.Shafer | 145 | engine | GTO | 29 | 2:43.782 | |
| DNF | 55 | David Heinz (USA)
Jim Trueman (USA) Jerry Thompson (USA) Cary Eisenlohr (USA)^ Ray McIntyre (USA)* |
Chevrolet Corvette (Dillon) | David Heinz | 134 | GTO | 21 | 2:38.927 | ||
| DNF | 78 | John Higgins (USA)
Chip Mead (USA) James King (USA) |
Porsche 911 Carrera RSR | Tokina | 128 | engine | GTO | 45 | 2:55.548 | |
| DNF | 7 | Bob Wollek (F)
Don Whittington (USA) Preston Henn (USA) Walter Brun (CH)* |
Porsche 935L (Andial) 002 | Preston Henn | 121 | GTP | 14 | 2:28.444 | ||
| NC | 85 | Don Nooe (USA)
Jim Stricklin (USA) Tim Stringfellow (USA) |
Chevrolet Corvette | Don Nooe | 118 | GTO | 70 | no time | ||
| DNF | 42 | Paul Lewis (USA)
Scott Pruett (USA) Joe Varde (USA) |
Mazda RX-7 | Mike Meyer | 117 | ignition | GTU | 38 | 2:51.190 | |
| DNF | 81 | Ken Bupp (USA)
Guy W. Church (USA) E.J.Generotti (USA) |
Chevrolet Camaro (Riggins) | Ken Bupp | 116 | gearbox | GTO | 37 | 2:49.812 | |
| DNF | 76 | Jack Baldwin (USA)
Jeff Kline (USA) Ira Young (USA)^ |
Mazda RX-7 (Fabcar) | Ira Young | 114 | engine | GTU | 27 | 2:43.015 | |
| DNF | 1 | Bill Whittington (USA)
Randy Lanier (USA) |
March-Chevrolet 84G | Blue Thunder | 114 | engine | GTP | 4 | 2:17.420 | |
| DNF | 45 | Luis Gordillo (PR)
Rolando Falgueras (PR) Manuel Villa Prieto (PR) |
Porsche 911 Carrera RSR | Pennzoil de Puerto Rico | 111 | GTO | 43 | 2:55.400 | ||
| NC | 54 | Steve Zwiren (USA)
Mike Tearney (USA) Robert Peters (CDN) Anthony Pio Costa (USA)* |
Mazda RX-7 | Steve Zwiren | 111 | GTU | 58 | no time | ||
| NC | 25 | William Boyer (USA)
Steve W. Roberts (USA) John Barben (USA) |
Chevrolet Camaro | Steve Roberts Jr | 109 | accident | GTO | 60 | no time | |
| DNF | 01 | Don Bell (USA)
Michael Brackman (USA) Tommy Riggins (USA) |
Argo-Buick JM16B | Stauffer Classics | 105 | gearbox | GTP | 11 | 2:24.051 | |
| DNF | 22 | Del Russo Taylor (USA)
John Hayes-Harlow (GB) Arvid Albanese (USA) |
Pontiac Firebird (Python) | Walter Johnston | 101 | GTO | 44 | 2:55.409 | ||
| DNF | 75 | Cameron Worth (USA)
Foko Gritzalis (USA) |
Mazda RX-3 | Cameron Worth | 91 | oil leak | GTU | 65 | no time | |
| DNF | 29 | Darin Brassfielf (USA)
Arie Luyendyk (NL) Jerry Brassfield (USA) |
March-Chevrolet 85G | DeAtley Motorsports | 90 | accident | GTP | 48 | no time | |
| DNF | 51 | John McComb (USA)
Rick Mancuso (USA) Fred Fiala (USA) |
Ferrari 512BB 30559 | Warren Mosler | 88 | gearbox | GTO | 35 | 2:48.710 | |
| DNF | 05 | Robert Whitaker (USA)
Ed Crosby (USA) Richard McDill (USA) Jeff Hudlett (USA)^ |
Chevrolet Camaro | Robert Whitaker | 76 | GTP | 67 | no time | ||
| DNF | 16 | Marty Hinze (USA)
Milt Minter (USA) Art Yarosh (USA) |
Porsche 935 930 770 0960 | Marty Hinze | 70 | suspension | GTP | 17 | 2:35.494 | |
| DNF | 26 | Werner Frank (USA)
Dave White (USA) Jerry Kendall (USA) |
Porsche 935 | Werner Frank | 68 | engine | GTP | 20 | 2:38.363 | |
| DNF | 17 | Al Bacon (USA)
Charles Guest (USA) Bobby Akin Jr (USA) |
Mazda RX-7 (Chassis Dynamics) | Al Bacon | 67 | GTU | 42 | 2:53.911 | ||
| DNF | 5 | Hans-Joachim Stuck Jr (D)
Bob Akin (USA) Jim Mullen (USA) |
Porsche 962 102 | Bob Akin | 66 | suspension | GTP | 1 | 2:12.975 | |
| DNF | 79 | Elliott Forbes-Robinson (USA)
Tom Winters (USA) Bob Bergstrom (USA) |
Porsche 924 Carrera | Paul Gentilozzi | 65 | brakes | GTU | 26 | 2:42.056 | |
| DNF | 49 | Carlos Munoz (USA)
Louis Lopez (CO) Herman Galeano (USA) Albert Naon Jr (USA) |
Porsche 911 | Conrad Racing | 65 | GTU | 66 | no time | ||
| DNF | 47 | Walt Bohren (USA)
Steve Millen (NZ) Billy Dingman (USA)^ |
Pontiac Firebird | Billy Dingman | 63 | engine | GTO | 19 | 2:36.813 | |
| DNF | 74 | Austin Godsey (USA)
Paul Gentilozzi (USA) Kent Hill (USA) |
Porsche 924 Carrera | Paul Gentilozzi | 59 | engine | GTU | 54 | no time | |
| DNF | 21 | William Gelles (USA)
Steve Cohen (USA) Don Walker (USA)^ |
Ferrari 512BB | Don Walker | 54 | engine | GTO | 24 | 2:41.480 | |
| DNF | 71 | Amos Johnson (USA)
Jack Dunham (USA) Dennis Shaw (USA)^ |
Mazda RX-7 (Highball) | Amos Johnson | 48 | gearbox | GTU | 36 | 2:48.866 | |
| DNF | 13 | dennis Wagoner (USA)
Ken Knott (USA) Frank Rubino (USA)^ |
Mazda RX-7 (Chassis Dynamics) | Frank Rubino | 46 | overheating | GTU | 63 | no time | |
| DNF | 69 | John Hofstra (USA)
Charles Slater (USA) Mick Robinson (USA) |
Porsche 911 Carrera RSR | Gary Wonzer | 45 | GTO | 72 | no time | ||
| DNF | 08 | Drake Olsen (ZA)
Steve Potter (USA) Paul Romano (USA)^ |
Mazda RX-7 | Simms/Romano | 44 | GTU | 62 | no time | ||
| DNF | 95 | Lance Van Every (USA)
Ash Tisdelle (USA) Jack Refenning (USA)^ |
Porsche 935 | Lance Van Every | 42 | oil temperature | GTP | 25 | 2:41.189 | |
| DNF | 60 | Tom Hunt (USA)
Jim Shelton (USA) Dean Jameson (USA)^ |
Mazda RX-3 | Tom Hunt | 40 | suspension | GTU | 68 | no time | |
| DNF | 3 | John Paul Jr (USA)
Ken Madren (USA) Wayne Pickering (USA) |
March-Buick 84G | Pegasus Racing | 38 | clutch | GTP | 5 | 2:17.675 | |
| DNF | 70 | Don Cummings (USA)
Craig A. Rubright (USA) Craig Walker (USA)^ |
Chevrolet Corvette (Linderfer) | Don Cummings | 37 | electrics | GTO | 56 | no time | |
| DNF | 04 | Brain Redman (GB)
Hurley Haywood (USA) |
Jaguar XJR-5 (Fabcar) | Bob Tullius | 36 | engine | GTP | 7 | 2:19.473 | |
| DNF | 50 | Buz McCall (USA)
Pancho Carter (USA) Tom Sheehy (USA)^ |
Chevrolet Camaro | Monty's Trainer | 34 | engine | GTO | 50 | no time | |
| DNF | 4 | Carson Baird (USA)
Terry Labonte (USA) Billy Hagan (USA)^ Lew Price (USA)* |
Chevrolet Corvette GTP-T711 (Lola) HU/02 | Lew Price | 27 | engine | GTP | 9 | 2:22.050 | |
| DNF | 92 | Chris Gennone (USA)
Hoyt Overbagh (USA) Fernando Prego (USA)^ |
Chevrolet Camaro (Stock Car Products) | Hoyt Overbagh | 27 | engine | GTO | 52 | no time | |
| DNF | 12 | George Schwarz (CDN)
Frank Jelinski (D) Jan Thoelke (D)^ Cliff Hansen (USA)* |
Gebhardt Ford-Cosworth JC843 | Fritz Gebhardt | 22 | accident | GTP | 15 | 2:33.310 | |
| DNF | 66 | Richard Habersin (USA)
Art Habersin (USA) |
Chevrolet Camaro | Rick Habersin | 22 | gearbox | GTO | 64 | no time | |
| DNF | 48 | Tom Cripe (USA)
Gary Wonzer (USA)^ Bruce Dewey (USA)^ Nort Northam (USA)* |
Porsche 934 | Gary Wonzer | 9 | GTO | 71 | no time | ||
| DNF | 32 | John Bossom (CDN)
Ken Hill (CDN)^ Regan Riley (CDN)^ |
Triumph TR8 | KJJ Enterprises | GTO | no time | ||||
| DNS | 80 | Carlos Catter (USA)
Hector Coco (USA) |
Chevrolet Camaro | Carlos Catter | GTO | |||||
| DNS | 0 | Gary Wonzer (uSA)
Del Russo Taylor (USA) |
Chevron-Buick GTP | Gary Wonzer | GTP | |||||
| DNS | 6 | Charles Morgan (USA)
Bill Alsup (USA) |
Royale-Buick RP40 | Charles Morgan | GTP | |||||
| DNS | 23 | Raul Garcia (USA) | Pontiac Firebird (Oftedahl) | Raul Garcia | GTO | |||||
| DNS | 77 | Carlos Munoz (USA)
Joe Gonzalez (USA) |
Chevrolet Camaro | Tortuga Racing | GTO | |||||
| DNA | 19 | Jack Miller (USA)
Carlos Ramirez (USA) Bruce Redding (USA) |
Nimrod-Aston Martin C2 | Performance Motorcar | GTP | |||||
| DNA | 27 | John Higgins (USA)
Chip Mead (USA) James King (USA) |
Porsche 911 Carrera | Tokina | GTO | |||||
| DNA | 33 | Ricardo Londono (CO)
Pedro Cardenas (USA) Alfredo Sesana (CO) |
Pontiac Firebird | Ricardo Londono | GTO | |||||
| DNA | 46 | Billy Dingman (USA)
Walt Bohren (USA) |
Pontiac Firebird | Billy Dingman | GTO | |||||
| DNA | 64 | Wally Dallenbach Jr (USA)
Greg Pickett (USA) |
Ford MsutanG (Roush) | Protofab | GTO | |||||
| DNA | 72 | Tom Winters (USA)
Bob Bergstrom (USA) Elliott Forbes-Robinson (USA) |
Fabcar-Porsche | Fabcar | GTP Lights | |||||
| DNA | 87 | George Alderman (USA)
Joe Hill (USA) Steve Alexander (USA) |
Ferrari 308GTB | Warren Mosler | GTU | |||||
| DNA | 97 | John Petrick (USA)
Donald Wallace (USA) |
Mazda RX-7 | Championship Motorsports | GTU |
| Winning Time: 12h00m06.858, 113.787 mph/183.122 kph |
| Fastest Lap: Al Holbert #14 (Porsche 962), 2m15.716, 128.916 mph/207.470 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) |