| 1st | 1 | Fitzpatrick / Busby | Porsche 935 K3/80 | John Fitzpatrick Racing | 2:28.6750 | 202.6357 |
| 00 | Ongais / Field | Porsche 935 K3/80 | Interscope Racing | 2:29.7900 | |
| 2nd | 3 | Meister / Stommelen / Grohs | Porsche 935 M16 | Andial/Meister Racing | 2:29.8820 | |
| 3rd | 86 | Haywood / Holbert / Leven | Porsche 935/80 | Bayside Disposal Racing | 2:30.8130 | |
| 4th | 9 | Garretson / Rahal / Redman | Porsche 935 K3/80 | Cooke Woods Racing/Garretson Enterprises | 2:34.3650 | |
| 5th | 30 | Moretti / Mendez / DeNarvaez | Porsche 935J | Momo/Penthouse | 2:34.6740 | |
| 6th | 8 | Paul / Paul, Jr. | Porsche 935 JLP-3 | JLP Racing | 2:35.6580 | |
| 7th | 0 | Field / Ongais | Porsche 935 K3/80 | Interscope Racing | 2:35.8140 | |
| 8th | 5 | Akin / Bell / Siebert | Porsche 935 K3 | Bob Akin Motor Racing | 2:35.8340 | |
| 9th | 94 | Whittington / Whittington / Whittington | Porsche 935 K3 | Whittington Bros | 2:36.8070 | |
| 10th | 90 | Woods / Kent-Cooke / McKitterick | Porsche 935 K3 | Cooke Woods Racing/Garretson Enterprises | 2:36.8480 | |
| 18 | Werner Frank | Porsche 935 | JLP Racing | 2:38.5560 | |
| 11th | 07 | Heimrath / Heimrath, Jr. | Porsche 935 | Heimrath Porsche | 2:38.7220 | |
| 12th | 2 | Hinze / Minter / Whittington | Porsche 935 K3 | Marty Hinze Racing | 2:39.8910 | |
| 13th | 20 | Cord / Adams | Chevrolet Monza | Chris Cord Racing | 2:42.7790 | |
| 14th | 14 | Gebhardt / Surer | BMW M1 | BMW Challenge Team | 2:43.8090 | 183.9142 |
| 15th | 25 | Cowart / Miller | BMW M1 | Red Lobster Racing | 2:44.5660 | |
| 16th | 35 | Gonzalez / Fernandez / Cochesa | Porsche 934 | H.S.M. Racing | 2:48.3900 | |
| 17th | 40 | Deacon / Freberg / Bartling | BMW M1 | David Deacon Racing | 2:48.7300 | |
| 18th | 09 | Henn / Gunn / Belcher | Porsche 935 K3 | T-Bird Swap Shop | 2:50.2000 | |
| 19th | 58 | Kendall / Smith / Aase | Porsche Carrera RSR | Charles Kendall | 2:51.3320 | |
| 20th | 41 | Hagan / Labonte | Chevrolet Camaro | Stratagraph | 2:52.2560 | |
| 21st | 82 | Cook / Casey / Bergstrom | Mazda RX-7 | Trinity Racing | 2:52.4220 | 174.7281 |
| 22nd | 97 | Cummings / Juckette | Chevrolet Monza | The Cummings Marque | 2:55.4360 | |
| 23rd | 54 | Naon / Garcia / Cruz | Porsche Carrera RSR | Florida Crystals/Montura Racing | 2:55.7540 | |
| 91 | Henn / Gunn / Belcher | Ferrari 512 BB | T-Bird Swap Shop | 2:55.7990 | |
| 24th | 24 | Refenning / Tilton / Welter | Porsche 934 | Jack Refenning | 2:56.3980 | |
| 25th | 7 | Mullen / Zimicki | Mazda RX-7 | Loud Car Racing | 2:57.6810 | |
| 26th | 04 | Rodriguez / Almeida / Morejon | Porsche Carrera RSR | T & R Racing | 2:57.7540 | |
| 27th | 93 | Carusso / Boy / Ramsey | Chevrolet Corvette | Sanyo/Russ Boy | 2:57.9940 | |
| 28th | 62 | Koll / Kline | Porsche 911 S | Kegel Enterprises | 2:58.6500 | |
| 29th | 85 | Loving / *Noseda / *Small | Chevrolet Camaro | Sunrise Auto Parts | 2:59.0170 | |
| 30th | 48 | McDill / Whitaker | Chevrolet Camaro | Meldeau Tire Stores | 3:00.0120 | |
| 31st | 79 | Van Every / *Bond / *Tisdelle | Porsche Carrera RSR | Van Every Racing | 3:00.2380 | |
| 32nd | 45 | Mitchell / Ratcliff / Cooper | Porsche 914/6 | Autosport Technology | 3:00.3730 | |
| 33rd | 83 | Shafer / Shafer / Crookston | Chevrolet Camaro | George R. Shafer | 3:00.6550 | |
| 34th | 70 | Doyle / *Phipps | Mazda RX-7 | Doyle Racing | 3:01.3980 | |
| 35th | 32 | Alderman / McComb | Datsun 240Z | Alderman Datsun | 3:02.2690 | |
| 36th | 43 | Gregg / Young / Varde | Porsche Carrera | Bob Gregg Racing | 3:02.4770 | |
| 37th | 68 | Valentine / Carter | Chevrolet Corvette | USA Racing | 3:02.5100 | |
| 38th | 03 | Pallavicini / *Crang / *Simpson | Porsche 934 | Angelo Pallavicini | 3:02.6200 | |
| 39th | 57 | Baker / Overby / Gilliland | Porsche 914/6 | Personalized Autohaus | 3:02.8110 | |
| 40th | 73 | Speer / Joosen / Vermeersch | Mazda RX-7 | Z & W Enterprises | 3:03.0610 | |
| 41st | 44 | Tullius / Adam | Triumph TR8 | Group 44 | 3:03.0960 | |
| 42nd | 4 | Kelly / Bedard | Triumph TR8 | Group 44 | 3:03.4540 | |
| 59th | 81 | Dietrich / Winters / McDonough | Mazda RX-7 | Trinity Racing | 3:03.5650 | |
| 43rd | 05 | Flaquer / Gonzalez / Dominguez | Porsche Carrera RSR | Miguel Morejon | 3:03.6600 | |
| 44th | 49 | Cosentino / Speakman | Mazda RX-7 | Faza Squadra | 3:03.7020 | |
| 36 | Bundy / Miller | Porsche 924 Carrera GTR Turbo | Herman + Miller P+A | 3:04.1120 | |
| 45th | 39 | Higgins / Mead / Johnson | Porsche 911 | The Foreign Exchange | 3:04.5170 | |
| 46th | 27 | LaGrow / Turner | Chevrolet Camaro | Kenneth LaGrow/Jack Holley | 3:04.5590 | |
| 49th | 66 | Dunham / Sheehy / Sereix | Mazda RX-7 | Dunham Trucking | 3:05.1720 | |
| 55th | 15 | Lutz / Panaccione | Porsche 911 Carrera RSR | D. L. Performance Engineering | 3:05.5320 | |
| 53rd | 34 | Drolsom / Hoskins / Marcus | Porsche 924 Carrera GTR Turbo | Drolsom Racing | 3:06.7700 | |
| 58th | 50 | Downing / Hoerr / Hoerr | Mazda RX-7 | Downing/Maffucci Racing | 3:07.4000 | |
| 76th | 56 | Borlase / *Hammond / *Kravig | Porsche Carrera | Rick Borlase | 3:07.4380 | |
| 52nd | 29 | Northam / Soldevilla | Porsche Carrera RSR | Bill Ferran | 3:07.4640 | |
| 71 | Morgan / Miller / Forrest | Datsun 280ZX | Morgan Performance Group | 3:08.6900 | |
| 56th | 53 | Hochreuter / Brezinka / Hirsch | Porsche Carrera | Fritz Hochreuter | 3:09.3310 | |
| 73rd | 61 | Canada / *Moffitt / *Cochran | Chevrolet Corvette | Sharkskin Racing | 3:09.8370 | |
| 62nd | 02 | Morton / Klausler | Ford Mustang | Firestone Tire & Rubber | 3:09.8900 | |
| 57th | 60 | Lee / Smith / Marx | AMC AMX | Bob's Speed Products | 3:10.0070 | |
| 60th | 52 | Swanson / Cripe / McDonald | Porsche 911 | Ours & Hours Racing | 3:10.2970 | |
| 66th | 16 | Grunnet / Burt / Paquette | Mazda RX-7 | Corp Racing Ltd. | 3:12.1070 | |
| 61st | 23 | Selby / Roe | Porsche Carrera | Roe/Selby Racing | 3:13.0760 | |
| 10 | Chitwood / Varde | Chevrolet Camaro | T. C. Racing | 3:13.0760 | |
| 63rd | 88 | Bitterauf / Moxley / Leo | Porsche 911 | Klaus Bitterauf | 3:13.3060 | |
| 64th | 89 | Levenson / *Kleinschmidt / *Kleinschmidt | Chevrolet Corvette | Vette Brakes | 3:13.4400 | |
| 77th | 67 | Ramirez / Gordillo / Villa | Porsche 911 | Pennzoil of Puerto Rico | 3:14.4050 | |
| 71st | 38 | Case / *Mummery / *Rynerson | Porsche 911 | Case Racing | 3:15.9850 | |
| 74th | 21 | Aschenbrenner / *Moennick / *Lausberg | Porsche 914/6 | Alps Restoration | 3:16.9840 | |
| 65th | 77 | Jennings / Bean / Ashby | Porsche 911 | Bruce R. Jennings | 3:20.2820 | |
| 70th | 31 | Arutunoff / Marina | Lancia Stratos | Hallet Motor Racing Circuit | 3:28.8580 | |
| 01 | Flaquer / Gonzalez / Dominguez | Porsche Carrera | T & R Racing | 3:31.2090 | |
| 67th | 12 | Tumbleston / Dumont / Smith | Chevrolet Camaro | Performance Marine Racing | 3:37.7740 | |
| 46 | Leuzinger / Van der Werff | De Tomaso Pantera | B R Racing | 3:52.5930 | |
| 48th | 28 | Posey / Stiff | Datsun 280ZX | NTS Racing | 12:50.2500 | |
| 47th | 98 | Mueller / Bohren | Mazda RX-7 | Kent Racing | no time | |
| 50th | 92 | Rude / Galica / *Mueller | Mazda RX-7 | Kent Racing | no time | |
| 51st | 55 | Mandeville / Johnson | Mazda RX-7 | Mandeville Racing Ent. | no time | |
| 54th | 13 | Lino / *Garcia / *Garcia | Chevrolet Corvette | Garcia Racing | no time | |
| 68th | 37 | Taylor / *Godard / *Cone | Alfa Romeo GTV | Vince Thompson | no time | |
| 69th | 84 | "Jamsal" / Barrientos / Valiente | Porsche 935 M16 | Scorpio Racing | no time | |
| 72nd | 75 | Honegger / Dieudonné / Libert / *Joosen / *Speer / *Archilla / *Vermeersch | Mazda RX-7 | Z & W Enterprises | no time | |
| 75th | 72 | Taylor / Ramsey | Chevron GTP Alfa Romeo | Vince Thompson | no time | |
| 78th | 42 | Cotrone / Showket / *Currin / *Donaldson | Chevrolet Corvette | Cotrone Racing Enterprises | no time | |