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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
16 DNF	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
24 DNF	GTO	26	Auriga Racing	Tom Nehl Nelson Silcox R. J. Valentine	Chevrolet Camaro	426
25 DNF	GTP	1	JLP Racing	John Paul Jr. Rene Rodriguez Joe Castellano	Porsche 935	412
26 DNF	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
31 DNF	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
33 DNF	GTU	71	Morgan Performance Technology	Charles Morgan Bill Johnson Jim Miller	Datsun 280ZX	305
34 DNF	GTU	27	Scuderia Rosso	Jim Fowells Ray Mummery Tom Sheehy	Mazda RX-7	300
35 DNF	GTU	78	Der Klaus Haus	Klaus Bitterauf Vicki Smith Scott Flanders	Porsche 911	299
36 DNF	GTP	65	Ron Spangler	Carson Baird Chip Mead Tom Pumpelly	Ferrari 512	294
37 DNF	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
39 DNF	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
42 DNF	GTU	66	Mike Meyer Racing	Jack Dunham Jeff Kline Jon Compton	Mazda RX-7	242
43 DNF	GTO	45	Statagraph, Inc.	Gene Felton Tom Williams Lloyd Frink	Chevrolet Camaro	223
44 DNF	GTP	21	Nimrod Racing	Lyn St. James John Graham Drake Olson	Nimrod NRA/C2	208
45 DNF	GTO	79	Whitehall Productions	Tom Winters Bob Bergstrom Peter Dawe	Porsche 924 Carrera GTR	193
46 DNF	GTO	55	B de T Racing	Diego Montoya Terry Herman Tony Garcia	BMW M1	172
47 DNF	GTO	14	Oftedahl Racing	Bob Raub Sam Moses Carl Shafer	Pontiac Firebird	165
48 DNF	GTU	16	Paul Goral	Paul Goral Larry Figaro Nort Northam	Porsche 911	161
49 DNF	GTP	74	Mark Wagoner	Del Russo Taylor Mike Angus Wayne Dessinger	Chevron GTP	152
50 DNF	GTP	44	Group 44	Bob Tullius Bill Adam Pat Bedard	Jaguar XJR-5	130
51 DNF	GTU	98	All American Racers	Dennis Aase Al Unser Jr. Mike Chandler	Toyota Celica	130
52 DNF	GTO	89	Taca El Salvador	"Jamsal" Eduardo Galdamez Eduardo Barrientos	Porsche 911 Carrera RSR	122
53 DNF	GTO	31	Kendco	Dale Kreider Dick Neland	Chevrolet Camaro	122
54 DNF	GTP	11	Nimrod Racing	A. J. Foyt Darrell Waltrip Guillermo Maldonado	Nimrod NRA/C2	121
55 DNF	GTO	67	Trans Am Specialties	Elliott Forbes-Robinson Gary Witzenburg Tony Swan	Pontiac Firebird	121
56 DNF	GTU	42	Gary Wonzer	Bill Bean Buzz Cason Gary Wonzer	Porsche 911	118
57 DNF	GTU	99	All American Racers	Gene Hackman Masanori Sekiya Kaoru Hoshino	Toyota Celica	118
58 DNF	GTO	64	John Hulen	John Hulen Ron Coupland Bob Speakman	Porsche 911 Carrera RSR	118
59 DNF	GTO	15	D&L Performance	Doug Lutz Dave Panaccione Larry Connor Fern Prego	Porsche 911 Carrera RSR	113
60 DNF	GTO	81	Robert Whitaker	Robert Whitaker Bill McDill Karl Keck	Chevrolet Camaro	98
61 DNF	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
63 DNF	GTO	43	Bob Gregg Racing	Bob Richardson Bob Young Bob Gregg	Chevrolet Camaro	85
64 DNF	GTO	04	Paul Canary Racing	Paul Canary Jean-Paul Libert Pascal Witmeur Roger Carmillet	Pontiac Firebird	85
65 DNF	GTU	32	Richard Cline	Rick Cline Paul Romano Mike Powell	Mazda RX-7	82
66 DNF	GTO	84	Motorsport Marketing	Emory Donaldson Steve Pope Ken Murray	Chevrolet Camaro	79
67 DNF	GTO	07	Heimrath Racing	Ludwig Heimrath Ludwig Heimrath Jr.	Porsche 934	71
68 DNF	GTU	30	Case Racing	Jack Rynerson Ron Case	Porsche 911	67
69 DNF	GTU	51	Red Roof Inns	Doug Carmean Don Herman John Finger	Mazda RX-7	57
70 DNF	GTU	82	Trinity Racing	Joe Varde John Casey Jack Baldwin	Mazda RX-7	52
71 DNF	GTO	87	Bob Beasley	Bob Beasley John Ashford Jack Lewis	Porsche 911 Carrera RSR	52
72 DNF	GTP	0	Interscope Racing	Ted Field Bill Whittington Danny Ongais	Lola T600	47
73 DNF	GTP	5	Bob Akin Motor Racing	Bob Akin John O'Steen Dale Whittington	Porsche 935	43
74 DNF	GTP	03	Angelo Pallavicini	Angelo Pallavicini Werner Frank	Porsche 935	24
75 DNF	GTO	02	Marketing Corp. of America	Milt Minter Ronnie Bucknum	Ford Mustang	24
76 DNF	GTP	6	JLP Racing	John Paul Phil Currin	Porsche 935	15
77 DNF	GTP	25	Red Lobster Racing	Dave Cowart Kenper Miller Mauricio de Narváez	March 82G	14
78 DNF	GTO	09	Mark Gassaway	Tom Ciccone Vic Shinn Joe Cogbill	Chevrolet Camaro	6
79 DNF	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

1. "Daytona 24 Hours 1983 - Racing Sports Cars".
2. ^ "Daytona 24 Hours 1983 - Photo Gallery - Racing Sports Cars".
3. "1983 Daytona 24 Hours | Motor Sport Magazine Database". Motor Sport Magazine. June 13, 2017.

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