Welcome to the IMSA History unofficial website

This site is aimed at bringing you memories from the glory days of sportscar racing in the US.



 1 59 PORSCHE CARRERA RSR 911 460 9054 Peter Gregg-Hurley Haywood 684 Laps 1.GTO
 2 11 PORSCHE CARRERA RSR 911 460 9049 Michael Keyser-Billy Sprowls-Andres Contreras 669 Laps 2.GTO
 3 23 PORSCHE CARRERA RSR Charlie Kemp-Carson Baird 668 Laps 3.GTO
 4 30 PORSCHE CARRERA RSR 911 460 9048 Jacques Bienvenue-George Dyer 665 Laps 4.GTO
 5  4 PORSCHE CARRERA RSR Bill Webbe-George Dickinson-Harry Theodoracopoulos 623 Laps 5.GTO
 6 43 PORSCHE CARRERA RSR John O'steen-Dave Helmick-John Graves 619 Laps 6.GTO
 7 71 FERRARI 365GTB4 16343 Jon Woodner-Fred Philips 613 Laps 1.FIA GT
 8 14 PORSCHE CARRERA RSR 005 0009 Al Holbert-Elliot Forbes Robinson 607 Laps 7.GTO
 9  5 PORSCHE CARRERA RSR 911 360 0328 R4 Guillermo Rojas-Hector Rebaque-Freddy van Beuren 592 Laps 8.GTO
10 60 PORSCHE 911S Rusty Bond-George Rollin-John Belperche 567 Laps 1.GTU
11 92 PORSCHE CARRERA RSR 911 360 0386 Mike Tillson-Dieter Oest-Lou Higgins 566 Laps 9.GTO
12 13 PORSCHE CARRERA RSR 911 360 0853 Randolph Townsend-John Thomas-Peter Papke 562 Laps 10.GTO
13 34 PORSCHE 911S George Drolsom-Bob Nagel 558 Laps 2.GTU
14 90 MAZDA RX3 Ray Walle-Tom Reddy 557 Laps 3.GTU
15 67 PORSCHE CARRERA RSR 911 360 0701 David McClain-Dave White-Frank Harmstad 546 Laps 11.GTO
16 44 PORSCHE CARRERA RSR John Freyre-Albert Naon-Tony Garcia 542 Laps 12.GTO
17  7 AMC GREMLIN Amos Johnson-Dennis Shaw-Steve Coleman 538 Laps 13.GTO
18 85 PORSCHE 914/6 John Hulen-Ron Coupland-Nick Engels 528 Laps 4.GTU
19 18 CHEVROLET CORVETTE 194678S402486 Jerry Thompson-Andrew Bach-Don Yenko 517 Laps 14.GTO
20 22 FORD MUSTANG Dave Mroz-Richard Mroz 497 Laps 15.GTO
21 73 CHEVROLET CORVETTE Bill Arnold-Bob Bienerth 450 Laps 16.GTO
22 26 CHEVROLET CAMARO Mike Williamson-Al Cosentino-Charles Gano 441 Laps 17.GTO
23 45 PORSCHE 911S Armando Ramirez-Camillo Mutiz-Juan Montalvo-Mandy Alvarez 435 Laps 5.GTU
24 12 DATSUN 510 Richard Hughes-Robert Whitaker-Fred Giesel 435 Laps 6.GTU
25 41 CHEVROLET CAMARO Herb Jones-Phil Currin-Steve Faul 427 Laps 18.GTO
26 29 DATSUN 240Z Bruce Matrito-Jack Steel 420 Laps 7.GTU
27 95 PORSCHE CARRERA RSR Ramon de Izaurieta-Sergio Tabec-Fidel Martinez 407 Laps 19.GTO
28  0 FERRARI 365GTB4 14141 Milt Minter-Claude Ballot Léna-Giancarlo Gagliardi 392 Laps 20.GTO
29 98 CHEVROLET CORVETTE James Alspaugh-Gene Persinger 392 Laps 21.GTO
30 88 CHEVROLET CAMARO Maurice Carter-Gene Felton 346 Laps 22.GTO
31 27 CHEVROLET CAMARO Jon Ward-Phil Henny-Dave Barnett 303 Laps 23.GTO
32 46 DATSUN 240Z Spencer Buzbee-Craig Ross-William Frates 275 Laps 8.GTU
33 24 BMW 3.0 CSL Sam Posey-Hans Stuck 274 Laps 24.GTO
34 64 CHEVROLET CAMARO C.C Canada-Russ Boykin-Guido Levetto 255 Laps 25.GTO
35 56 FERRARI 365GTB4 13367 Harry Jones-Marcel Mignot-Cyril Grandet 238 Laps 26.GTO
36 51 PORSCHE 914/6 Len Jones-Bob Kirby-John Hotschkis 229 Laps 9.GTU
37 83 VOLVO 142 Arthur Mollin-Michael Gatoff-Art Riley 219 Laps 10.GTU
38 17 CHEVROLET CAMARO Vince Gimondo-Dave Heinz-Bert Everett 201 Laps 27.GTO
39  9 PORSCHE CARRERA RSR 911 360 1099 Juan Carlos Bolanos-Michel Jourdain-Hans Heyer 191 Laps 28.GTO
40 89 PORSCHE 911S Don Parish-Tom Countryman-Jim Secher 158 Laps 11.GTU
41 84 PORSCHE 911S Klaus Selbert-David Biggs 151 Laps 12.GTU
42 75 CHEVROLET CORVETTE John Greenwood-Vince Muzzin-Carl Shafer 148 Laps 29.GTO
43 87 CHEVROLET CAMARO Tony de Lorenzo-Dick Brown-Maurice Carter 125 Laps 30.GTO
44 28 LOTUS EUROPA Anatoly Arutunoff-Alf Gebhardt-Brian Goellnicht 114 Laps 2.FIA GT
45 15 CHEVROLET CORVETTE Javier Garcia-George Garcia 110 Laps 31.GTO
46 42 CHEVROLET CORVETTE John Carusso-Dick Vreeland-Luis Sereix 59 Laps 32.GTO
47 110 CHEVROLET CAMARO Tom Nehl-Milton Moise 41 Laps 33.GTO
48 16 PORSCHE 911S Paul Spruell-Bill Bean 35 Laps 13.GTU
49 72 MAZDA RX2 Gilberto Jimenez-Patricio Zambrano-Luis Lamberton 34 Laps 14.GTU
50 25 BMW 3.0 CSL Ronnie Peterson-Brian Redman 29 Laps 34.GTO
51  1 FERRARI 365GT4/BB 18139 Claude Ballot Léna-Alain Cudini-Milt Minter 0 Lap 35.GTO

Cars that did not start

   00 CHEVROLET CAMARO Jim Corwin-Jerry Mull GTO
   20 FERRARI 365GTB4 16367 John Morton GTO
   32 PORSCHE CARRERA RSR Sepp Greger-Eberhard Sindel-Dieter Schmid GTO
   52 PORSCHE 911 Bob Punch-John Rulon-Miller-Tom Waugh GTU
   55 PORSCHE 914/6 Lee Cutler GTU
   69 CHEVROLET VEGA Steve Coleman-Amos Johnson GTO
   49 FORD MUSTANG Neil Potter-Bob Gray-Bobby Dumont GTO
   53 PORSCHE CARRERA RSR Andres Contreras-Juan Izquierdo-Luis Iglesias GTO
   62 PORSCHE CARRERA RSR 911 460 0111 Bob Bergstrom GTO

 A Porsche parade

John Greenwood Chevrolet and the BMWs leading the parade.

It was the first year that the 24 Hours of Daytona were to be run as part of the IMSA Camel GT Challenge and the entry list for the race displayed 50 cars. The practice sessions had been dominated by John Greenwood Super Vette who did "only" 1m55s223 to establish himself as the polesitter. It was 3s slower than his record lap during the 1974 IMSA Finale. Following the Corvette were the two Works BMW who were running their first ever IMSA race and brought a welcome addition to the usual field. Behind those cars, you could find Maurice Carter-Gene Felton Camaro followed by Al Holbert-Elliot Forbes Robinson on the first Porsche Carrera, then Juan Carlos Bolanos-Michel Jourdain who had received a welcome additional driver as Hans Heyer put this car in sixth position, just ahead Peter Gregg-Hurley Haywood and Hector Rebaque-Guillermo Rojas-Fred van Beuren similar car. Plenty of action was to be awaited from that race. At the start, as expected, John Greenwood pulled away, trailing the two BMWs driven by Ronnie Peterson and Sam Posey leading the quintet Holbert-Gregg-Carter-de Lorenzo-Thompson, all swapping places and providing the fans with some great racing actions.

The Ferrari Boxer driven by Claude Ballot Léna would come back to the pits after the pace-lap to retire from the race. John Greenwood easily maintained his pace, Peterson was 28s and Posey 50s down after one hour when Peterson pitted in a hurry : the engine had blown. Vince Muzzin took the wheel of the leading car, after its second refueling pitstop, and Sam Posey took briefly the lead of the race. Muzzin would take back the lead but for a short period as the car began overheating. Many pitstops after changing the radiator, they would find out what caused so much trouble was a heat-escape valve, a part that would be replaced in two minutes. The BMW took the lead and began to dominate the race and had built up a three lap lead over the Holbert-Forbes Robinson Porsche. Earlier in the race, Peter Gregg had collided with Guillermo Rojas Porsche and lost fifteen minutes to repair his car. He was now pushing hard and despite some bodywork damage, was coming back to a leading position. The BMW driven by Sam Posey was always in the lead but had to stop, definitively at 12.45 am. The American cars no longer any threat to the German cars, the Porsches would fight together for overall victory. Al Holbert-Elliot Forbes Robinson became the new race leaders. They would hold their position for a few hours, before experiencing transmission trouble.

At the halfway mark, they led the race with a four laps lead over Peter Gregg-Hurley Haywood. The gap between the two cars would soon be nullified as a thick fog was to slow down nearly every racer. At 6h15 am, Hurley Haywood, not to be slowed so much by this fog, took the lead of the race, definitively. It was done the easy way as Holbert's Porsche was quietly getting into more and more trouble. The transmission was getting worse and slowed the car who was losing ground. As they tried to nurse the car to the chequered, Al Holbert and Elliot Forbes Robinson were overtaken by six more cars to finish eighth overall. A well-deserved rank as they did not cross the finish line to retire one hour prior to the chequered. Peter Gregg and Hurley Haywood had an easy but strong pace to finish 15 laps ahead Michael Keyser-Billy Sprowls, Charlie Kemp-Carson Baird took third place, fourth were George Dyer-Jacques Bienvenue. The GTU class was won by another Porsche, the Rusty Bond-George Rollin-John Belperche 911S. The first non-Porsche in the standings was the Ferrari 365GTB4 entered by Interscope Racing for Jon Woodner-Fred Phillips, who placed 7th overall.