| 1st | 14 | Al Holbert / Jim Trueman | March 83G Porsche | Holbert Racing | 2:09.9490 | 178.3362 |
| 2nd | 06 | Tim Coconis / Klaus Ludwig | Ford Mustang GTP | Zakspeed Roush | | |
| 3rd | 1 | John Paul, Jr. / Preston Henn | Porsche 935 L | Henn's Swap Shop Racing | | |
| 4th | 45 | John Morton / Bob Lobenberg | Lola T600 Chevrolet | Conte Racing | | |
| 5th | 6 | Bobby Rahal / Geoff Brabham | Ford Mustang GTP | Zakspeed Roush | | |
| 6th | 15 | John Kalagian / John Mills | Lola T600 Chevrolet | Kalagian Ardisana | | |
| 7th | 25 | Kenper Miller | March 83G Chevrolet | Red Lobster Racing | | |
| 8th | 83 | Tony Adamowicz / Don Devendorf | Datsun 280ZX Turbo | Electramotive Racing | 2:18.9960 | 166.7280 |
| 9th | 9 | Wayne Baker / Jim Mullen / Kees Nierop | Porsche 934 | Wayne Baker Racing | | |
| 10th | 12 | Al Leon / Art Leon | March 83G Chevrolet | Leon Bros Racing | | |
| 11th | 39 | John Gunn / Gary Belcher | Phoenix JG1 Chevrolet | Holly Racing | | |
| 12th | 4 | Billy Hagan / Gene Felton | Chevrolet Camaro III | Stratagraph | | |
| 13th | 86 | Bruce Leven / Jim Adams | Lola T600 Porsche Turbo | Bayside Disposal Racing | | |
| 14th | 37 | Dave Watson | Pontiac Firebird | Deppe-Lundy Old Style | | |
| 15th | 5 | Bob Akin | Porsche 935 K3/80 | Bob Akin Motor Racing | | |
| 16th | 7 | Pete Halsmer | Mazda RX-7 | Racing Beat | | |
| 17th | 20 | Paul Canary / Eppie Wietzes | Pontiac Firebird | Paul Canary Racing | | |
| 18th | 85 | Logan Blackburn | Datsun 280ZX | Blackburn Racing | 2:28.1300 | 156.4475 |
| 19th | 78 | Rob Dyson / Ken Slagle | Pontiac Firebird | Dyson Racing | | |
| 20th | 38 | Roger Mandeville / Amos Johnson | Mazda RX-7 | Mandeville Auto/Tech | | |
| 21st | 24 | Ken Madren | Porsche 935 JLP-2 | Pegasus III Racing | | |
| 22nd | 55 | Diego Montoya / "Fomfor" | BMW M1 | B. de T. Racing | | |
| 23rd | 63 | Jim Downing / John Maffucci | Mazda RX-7 | RGP 500 Racing | | |
| 24th | 82 | Joe Varde / Jeff Kline | Mazda RX-7 | Western Airlines | | |
| 25th | 94 | Richard Anderson / Bard Boand | Chevrolet Corvette | Boand Racing | | |
| 26th | 17 | Al Bacon / Lance Van Every | Mazda RX-7 | | | |
| 27th | 98 | Mike Gillman / Scott Gillman | Toyota Celica | All American Racers | | |
| 28th | 21 | Terry Farber / Steve Gentile | Chevrolet Corvette | Midwest Racing Distributor | | |
| 29th | 35 | Jack Griffin / Bobby Hefner | Porsche Carrera | G & H Development | | |
| 30th | 34 | George Drolsom / Deborah Gregg | Porsche 924 Carrera | Drolsom Racing | | |
| 31st | 43 | Paul Davey | BMW M1 | Walker Brown Racing | | |
| 32nd | 23 | Earl Roe / Tim Selby | Porsche 914/6 | Roe/Selby Racing | | |
| 33rd | 49 | Dan Schott / Max Schmidt | Chevrolet Corvette | Schott Racing | | |
| 34th | 13 | J. Robert Johnson / George Wilkie | Porsche 911 | Autoworks | | |
| 35th | 64 | John Hulen / Ron Coupland | Porsche Carrera RSR | John Hulen | | |
| 36th | 41 | Rusty Schmidt | Chevrolet Corvette | Starved Rock Lodge | | |
| 37th | 27 | Jim Fowells / Ray Mummery | Mazda RX-7 | Scuderia Rosso | | |
| 38th | 03 | Lloyd Frink / Dave Barnett | Chevrolet Corvette C3 | Lloyd Frink | | |
| 39th | 93 | Frank Rubino / Roy Newsome | Mazda RX-7 | Rubino Racing | | |
| 40th | 96 | Phil Byrd / Richard Silver | Porsche Carrera RSR | Weld Fixturing | | |
| 41st | 29 | George Philips / Tim Toomey | Datsun Z | George Philips | | |
| 42nd | 2 | Mark Altman / Gary Altman | Porsche 911 | Altman Bros Motor Racing | | |
| 43rd | 3 | Richard Graves / Alice Graves | Porsche 914/6 | Richard Graves | | |
| 44th | 56 | Rick Borlase / Werner Frank | Porsche 934 | Rick Borlase | | |
| 45th | 57 | Reed Kryder / Drake Olson | Datsun ZX | Kryderacing | | |
| 46th | 71 | Charles Morgan / Jim Miller | Datsun 280ZX | Morgan Performance | | |
| 47th | 26 | Robert Overby / Don Bell | Buick Regal | | | |
| 48th | 30 | Ron Case / Jack Rynerson | Porsche 911 | Dr. Ronald Case | | |