The Silver Anniversary Edition 24 Hour Pepsi Challenge was a 24-hour endurance sports car race held on February 5–6, 1983 at the Daytona International Speedway road course. The race served as the opening round of the 1983 IMSA GT Championship.

Victory overall and in the GTP class went to the No. 6 Henn's Swap Shop Racing Porsche 935 driven by Bob Wollek, Claude Ballot-Léna, Preston Henn, and A. J. Foyt. Victory in the GTO class went to the No. 7 Racing Beat Mazda RX-7 driven by Pete Halsmer, Bob Reed, and Rick Knoop. Victory in the GTU class went to the No. 92 Kent Racing Mazda RX-7 driven by Lee Mueller, Hugh McDonough, and Terry Visger.

Race results Class winners in bold. Pos Class No Team Drivers Car Laps 1 GTP 6 Henn's Swap Shop Racing Bob Wollek Claude Ballot-Léna Preston Henn A. J. Foyt Porsche 935 618 2 GTP 88 Motorsports Marketing Terry Wolters Randy Lanier Marty Hinze March 83G 612 3 GTO 7 Racing Beat Pete Halsmer Bob Reed Rick Knoop Mazda RX-7 598 4 GTP 24 Pegasus III Racing M. L. Speer Ken Madren Ray Ratcliff Porsche 935 578 5 GTO 50 Latino Racing Diego Febles Kikos Fonseca Roy Valverde Porsche 911 Carrera RSR 568 6 GTP 10 Cooke Racing Ralph Kent-Cooke Jim Adams John Bright Lola T600 563 7 GTO 05 T&R Racing Tico Almeida Miguel Morejon Ernesto Soto Porsche 911 Carrera RSR 561 8 GTP 77 Z&W Enterprises Walt Bohren Pierre Honneger David Palmer Mazda GTP 553 9 GTO 9 Personalized Autohaus Wayne Baker Jim Mullen Bob Garretson Porsche 934 551 10 GTO 35 Pegasus Racing Paul Gilgan Al Leon Wayne Pickering Porsche 911 Carrera RSR 547 11 GTP 47 Frank Rubino Frank Rubino Pepe Romero Doc Bundy Dale Whittington Porsche 935 546 12 GTU 92 Kent Racing Lee Mueller Hugh McDonough Terry Visger Mazda RX-7 544 13 GTO 58 Brumos Racing Kathy Rude Deborah Gregg Bonnie Henn Porsche 924 Carrera GTR 531 14 GTU 90 901 Shop Mike Schaefer Jack Refenning John Belperche Doug Zitza Porsche 911 525 15 GTO 61 Vista Racing Brent O'Neill Don Courtney Luis Sereix Chevrolet Monza 525 16DNF GTP 86 Bayside Disposal Racing Hurley Haywood Bruce Leven Al Holbert Porsche 935 515 17 GTU 60 Team Morrison Steve Dietrich Chris Ivey Jim Cook Mazda RX-7 514 18 GTO 85 Richard Lloyd Richard Lloyd George Drolsom Jonathan Palmer Porsche 924 Carrera GTR 500 19 GTU 38 Mandeville Auto/Tech Roger Mandeville Amos Johnson Danny Smith Mazda RX-7 476 20 GTO 4 Statagraph, Inc. Billy Hagan Terry Labonte Lloyd Frink Chevrolet Camaro 467 21 GTU 63 RGP 500 Racing Jim Downing John Maffucci Steve Potter Mazda RX-7 466 22 GTO 29 Overby's Robert Overby Chris Doyle Don Bell Chevrolet Camaro 438 23 GTU 37 Burdsall-Welter Racing Tom Burdsall Peter Welter Al Bacon Mazda RX-7 436 24DNF GTO 26 Auriga Racing Tom Nehl Nelson Silcox R. J. Valentine Chevrolet Camaro 426 25DNF GTP 1 JLP Racing John Paul Jr. Rene Rodriguez Joe Castellano Porsche 935 412 26DNF GTO 13 Gordon Oftedahl Duane Eitel Mike Brummer Phil Pate Pontiac Firebird 411 27 GTO 28 Avanti Herb Adams John Martin Joe Ruttman Leonard Emanuelson Avanti II 410 28 GTO 40 Bieri Racing Uli Bieri Matt Gysler Duff Hubbard BMW M1 406 29 GTU 97 All American Racers Wally Dallenbach Jr. Willy T. Ribbs Whitney Ganz Toyota Celica 365 30 GTO 75 Bard Boand Bard Boand Richard Anderson Mike Stephens Chevrolet Corvette 358 31DNF GTP 83 Thomas T. Ciccone Mike Gassaway Scott Smith Joe Cogbill Joe Cogbill Jr. Chevrolet Camaro 357 32 GTU 52 TFC Racing Tom Cripe Dick Gauthier David Duncan Jack Swanson Porsche 911 312 33DNF GTU 71 Morgan Performance Technology Charles Morgan Bill Johnson Jim Miller Datsun 280ZX 305 34DNF GTU 27 Scuderia Rosso Jim Fowells Ray Mummery Tom Sheehy Mazda RX-7 300 35DNF GTU 78 Der Klaus Haus Klaus Bitterauf Vicki Smith Scott Flanders Porsche 911 299 36DNF GTP 65 Ron Spangler Carson Baird Chip Mead Tom Pumpelly Ferrari 512 294 37DNF GTO 23 Superior Racing Team Raul Garcia Vince DiLella Armando Fernandez Chevrolet Camaro 285 38 GTO 01 Marketing Corporation John Morton Tom Klausler Ronnie Bucknum Ford Mustang 284 39DNF GTO 72 John Josey Gary Baker Sterling Marlin Chevrolet Corvette 284 40 GTO 41 Starved Rock Ledge Rusty Schmidt Scott Schmidt Chevrolet Corvette 263 41 GTO 49 OMR Engines Hoyt Overbagh Peter Kirill David Price Chevrolet Monza 243 42DNF GTU 66 Mike Meyer Racing Jack Dunham Jeff Kline Jon Compton Mazda RX-7 242 43DNF GTO 45 Statagraph, Inc. Gene Felton Tom Williams Lloyd Frink Chevrolet Camaro 223 44DNF GTP 21 Nimrod Racing Lyn St. James John Graham Drake Olson Nimrod NRA/C2 208 45DNF GTO 79 Whitehall Productions Tom Winters Bob Bergstrom Peter Dawe Porsche 924 Carrera GTR 193 46DNF GTO 55 B de T Racing Diego Montoya Terry Herman Tony Garcia BMW M1 172 47DNF GTO 14 Oftedahl Racing Bob Raub Sam Moses Carl Shafer Pontiac Firebird 165 48DNF GTU 16 Paul Goral Paul Goral Larry Figaro Nort Northam Porsche 911 161 49DNF GTP 74 Mark Wagoner Del Russo Taylor Mike Angus Wayne Dessinger Chevron GTP 152 50DNF GTP 44 Group 44 Bob Tullius Bill Adam Pat Bedard Jaguar XJR-5 130 51DNF GTU 98 All American Racers Dennis Aase Al Unser Jr. Mike Chandler Toyota Celica 130 52DNF GTO 89 Taca El Salvador "Jamsal" Eduardo Galdamez Eduardo Barrientos Porsche 911 Carrera RSR 122 53DNF GTO 31 Kendco Dale Kreider Dick Neland Chevrolet Camaro 122 54DNF GTP 11 Nimrod Racing A. J. Foyt Darrell Waltrip Guillermo Maldonado Nimrod NRA/C2 121 55DNF GTO 67 Trans Am Specialties Elliott Forbes-Robinson Gary Witzenburg Tony Swan Pontiac Firebird 121 56DNF GTU 42 Gary Wonzer Bill Bean Buzz Cason Gary Wonzer Porsche 911 118 57DNF GTU 99 All American Racers Gene Hackman Masanori Sekiya Kaoru Hoshino Toyota Celica 118 58DNF GTO 64 John Hulen John Hulen Ron Coupland Bob Speakman Porsche 911 Carrera RSR 118 59DNF GTO 15 D&L Performance Doug Lutz Dave Panaccione Larry Connor Fern Prego Porsche 911 Carrera RSR 113 60DNF GTO 81 Robert Whitaker Robert Whitaker Bill McDill Karl Keck Chevrolet Camaro 98 61DNF GTO 36 Herman & Miller P&A Paul Miller Jim Busby Ron Grable Porsche 924 Carrera GTR 91 62 GTO 06 Bobby Diehl Bobby Diehl Roy Newsome Mazda RX-7 87 63DNF GTO 43 Bob Gregg Racing Bob Richardson Bob Young Bob Gregg Chevrolet Camaro 85 64DNF GTO 04 Paul Canary Racing Paul Canary Jean-Paul Libert Pascal Witmeur Roger Carmillet Pontiac Firebird 85 65DNF GTU 32 Richard Cline Rick Cline Paul Romano Mike Powell Mazda RX-7 82 66DNF GTO 84 Motorsport Marketing Emory Donaldson Steve Pope Ken Murray Chevrolet Camaro 79 67DNF GTO 07 Heimrath Racing Ludwig Heimrath Ludwig Heimrath Jr. Porsche 934 71 68DNF GTU 30 Case Racing Jack Rynerson Ron Case Porsche 911 67 69DNF GTU 51 Red Roof Inns Doug Carmean Don Herman John Finger Mazda RX-7 57 70DNF GTU 82 Trinity Racing Joe Varde John Casey Jack Baldwin Mazda RX-7 52 71DNF GTO 87 Bob Beasley Bob Beasley John Ashford Jack Lewis Porsche 911 Carrera RSR 52 72DNF GTP 0 Interscope Racing Ted Field Bill Whittington Danny Ongais Lola T600 47 73DNF GTP 5 Bob Akin Motor Racing Bob Akin John O'Steen Dale Whittington Porsche 935 43 74DNF GTP 03 Angelo Pallavicini Angelo Pallavicini Werner Frank Porsche 935 24 75DNF GTO 02 Marketing Corp. of America Milt Minter Ronnie Bucknum Ford Mustang 24 76DNF GTP 6 JLP Racing John Paul Phil Currin Porsche 935 15 77DNF GTP 25 Red Lobster Racing Dave Cowart Kenper Miller Mauricio de Narváez March 82G 14 78DNF GTO 09 Mark Gassaway Tom Ciccone Vic Shinn Joe Cogbill Chevrolet Camaro 6 79DNF GTO 19 Van Every Racing Lance van Every Ash Tisdelle Porsche 911 Carrera RSR 0 DNS GTP 00 Interscope Racing Ted Field Bill Whittington Danny Ongais Lola T600 - DNS GTP 2 Hinze Fencing Marty Hinze Porsche 935 - DNS GTO 17 Dingman Bros. Racing Billy Dingman Roger Bighouse John Gunn Chevrolet Corvette - DNS GTO 18 Bill Nelson Vincent Collins Bill Nelson Lojza Vosta Pontiac Firebird - DNS GTO 20 Dale Kreider Dale Kreider Dave Heinz Chevrolet Corvette - DNS GTU 39 Donald Flores Donald Flores Robert Gottfried Howdy Holmes Porsche 911 - DNS GTU 69 Conrado Casado Ricardo Londoño Diego Londoño Fred Flaquer Porsche 911 - DNS GTU 73 G.O. Racing Ken Grostic Keith Lawhorn Porsche 914 -Source:

References