PORSCHE RACING HISTORY1978 - Sebring 12 Hours
18 March 1978 - Sebring International Raceway, USA
Brian Redman, Charles Mendez & Bob Garretson win in a Porsche 935
Overall - 1st, 2nd, 3rd : GTX - 1st, 2nd, 3rd : GTO - 1st : GTU - 1st, 2nd, 3rd
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 | 930 890 0037 | GTX | Brian Redman (GB)/Charles Mendez (USA)/Bob Garretson (USA) | Dick Barbour Performance (USA) | 1st | 1st | 5th | 240 laps |
| 95 | Porsche 935 | 930 770 0957 | GTX | Bob Hagestad (USA)/Hurley Haywood (USA) | Bob Hagestad (USA) | 2nd | 2nd | 3rd | 240 laps |
| 13 | Porsche 935 | 930 670 0180 | GTX | Hal Shaw, Jr. (USA)/Tom Spalding (USA) | Ore House - Vail (USA) | 3rd | 3rd | 8th | 239 laps |
| 33 | Porsche 911 Carrera RSR | 911 460 9113 | GTO | John Paul Sr. (USA)/Bonky Fernandez (PR) | JLP Racing (USA) | 4th | 1st | 10th | 233 laps |
| 32 | Porsche 911 Carrera RSR | 911 460 9048 | GTX | Steve Earle (USA)/Bob Akin (USA)/Rick Knoop (USA) | Earle & Akin Racing (USA) | 5th | 4th | 16th | 225 laps |
| 77 | Porsche 911 S | GTU | Francisco Romero (YV)/Ernesto Soto (YV) | Bill Scott Racing | 6th | 1st | 25th | 219 laps | |
| 42 | Porsche 911 S | GTU | Chiqui Soldevilla (PR)/Luis Gordillo (PR) | El Sol Racing | 7th | 2nd | 73rd | 213 laps | |
| 62 | Porsche 914/6 | 914 043 0593 | GTU | Bill Koll (USA)/David Hamren (USA)/Dennis Sherman (USA) | William J. Koll (USA) | 10th | 3rd | 53rd | 209 laps |
| 58 | Porsche 911 Carrera RSR | GTO | Diego Febles (PR)/Alec Poole (GB) | Diego Febles Racing (PR) | 13th | 4th | 15th | 197 laps - Mechanical | |
| 36 | Porsche 911 T | 1290486 | GTU | Ron Case (USA)/Dave Panaccione (USA)/Jack Rynerson (USA) | Case Racing | 15th | 5th | 42nd | 196 laps |
| 50 | Porsche 911 S | GTU | Fritz Hochreuter (CDN)/Rudy Bartling (CDN)/Rainer Brezinka (CDN) | Fritz Hochreuter (CDN) | 16th | 6th | 43rd | 189 laps | |
| 01 | Porsche 911 S | GTU | Dave White (USA)/J. Dana Roehrig (USA)/Gary Mesnick (USA) | Roehrig Racing Inc. | 18th | 7th | 30th | 185 laps | |
| 79 | Porsche 911 Carrera RSR | GTO | Michael Callas (USA)/Peter Papke (USA)/Jim Cook (USA) | Rennsport Porsche Works (USA) | 20th | 7th | 13th | 182 laps | |
| 89 | Porsche 911 | GTU | Rusty Bond (USA)/Ren Tilton (USA) | Barrick Motor Racing | 21st | 8th | 39th | 181 laps | |
| 85 | Porsche 914/6 | GTU | John Hulen (USA)/Ron Coupland (USA)/Nick Engels (USA) | John Hulen (USA) | 23rd | 9th | 40th | 174 laps | |
| 93 | Porsche 934 | 930 670 0152 | GTX | Don Whittington (USA)/Russ Boy (USA) | Whittington Bros. (USA) | 24th | 6th | 31st | 172 laps |
| 70 | Porsche 911 S | GTU | M. L. Speer (USA)/Windle Turley (USA) | Race Car Ent. | 25th | 10th | 56th | 168 laps | |
| 71 | Porsche 911 | GTU | John Higgins (USA)/Tim Cooper (USA)/James King (USA) | Foreign Exchange Racing | 26th | 11th | 35th | 168 laps | |
| 88 | Porsche 911 S | GTU | Joseph Hamilton (USA)/Chuck Wade (USA)/Ron Collins (USA) | Hamilton House Racing | 27th | 12th | 47th | 167 laps | |
| 07 | Porsche 911 Carrera RSR | 911 560 9114 | GTO | Dave Cowart (USA)/Nick Craw (USA)/Joe Castellano (I) | Morrison's Inc. | 28th | 8th | 23rd | 165 laps - Suspension |
| 00 | Porsche 914/6 | GTU | Steve Southard (USA)/Jim Trueman (USA) | Red Roof Inns (USA) | 29th | 13th | 63rd | 164 laps - Mechanical | |
| 21 | Porsche 914/6 | 471 29 12215 | GTU | Vince DiLella (USA)/Manuel Cueto (USA) | DiLella Racing (USA) | 31st | 15th | 66th | 152 laps |
| 51 | Porsche 911 S | GTU | John Hotchkis (USA)/Robert Kirby (USA)/Dennis Aase (USA) | Wynn's International | 32nd | 16th | 33rd | 142 laps - Mechanical | |
| 91 | Porsche 911 Carrera RSR | GTO | Werner Frank (USA)/Roger Schramm (USA) | Framm Promotions/W. Frank (USA) | 34th | 10th | 36th | 140 laps | |
| 08 | Porsche 911 S | 911 030 1263 | GTU | Terry Wolters (USA)/Wayne Miller (USA) | Terry Wolters | 35th | 17th | 58th | 129 laps - Mechanical |
| 09 | Porsche 934 | 930 670 0175 | GTX | Gary Belcher (USA)/Doc Bundy (USA) | Belcher Racing (USA) | 40th | 8th | 74th | 115 laps - Mechanical |
| 34 | Porsche 911 S | GTU | George Drolsom (USA)/Hugh Davenport (USA) | Drolsom Racing Inc. (USA) | 44th | 21st | 67th | 98 laps - Engine | |
| 87 | Porsche 911 S | GTO | Pedro Vazquez (USA)/Ron Oyler (USA) | Pedro Vazquez (USA) | 47th | 12th | 68th | 83 laps - Gearbox | |
| 28 | Porsche 935 | 930 770 0960 | GTX | Clif Kearns (USA)/Marty Hinze (USA)/Stephen Behr (USA) | Desperado Racing (USA) | 49th | 12th | 7th | 79 laps |
| 24 | Porsche 911 Carrera RSR | 911 460 9056 | GTX | Tom Frank (USA)/Bob Bergstrom (USA) | Executive Industries (USA) | 50th | 13th | 14th | 77 laps - Gearbox |
| 46 | Porsche 911 Carrera RSR | 911 360 0865 | GTO | Mauricio DeNarváez (COL)/Albert Naon (USA) | Mauricio De Narvaez (CO) | 51st | 13th | 19th | 76 laps - Mechanical |
| 27 | Porsche 911 S | GTU | Ray Mummery (USA)/Jack Refenning (USA)/Tom Sheehy (USA) | Miami Auto Racing | 52nd | 23rd | 50th | 70 laps - Clutch | |
| 3 | Porsche 911 Carrera RSR | GTX | Bill Freeman (USA)/Bob Harmon (USA)/Byron Leydecker (USA) | Bill Freeman Racing | 54th | 14th | 72nd | 62 laps - Mechanical | |
| 6 | Porsche 935/77A | 930 890 0033 | GTX | Dick Barbour (USA)/Rolf Stommelen (D)/Manfred Schurti (FL) | Dick Barbour Performance (USA) | 57th | 16th | 2nd | 47 laps - Suspension |
| 76 | Porsche 911 | GTU | Frank Thomas (USA)/Lee Mueller (USA)/Paul May (USA) | Quality Inn | 60th | 24th | 22nd | 43 laps - Engine | |
| 8 | Porsche 911 Carrera RSR | 911 460 0035 | GTX | Bob Beasley (USA)/Bruce Jennings (USA) | Robert Beasley | 62nd | 19th | 17th | 30 laps - Mechanical |
| 45 | Porsche 911 | GTU | Gary Steele (USA)/Jim Gaeta (USA)/Bob Zulkowski (USA) | Vann's Auto Body | 63rd | 26th | 45th | 28 laps - Engine | |
| 59 | Porsche 935 | 930 770 0909 | GTX | Peter Gregg (USA)/Brad Frisselle (USA) | Brumos Porsche (USA) | 69th | 21st | 4th | 11 laps - Accident |
| 7 | Porsche 935 | 930 770 0958 | GTX | Ludwig Heimrath, Sr (CDN)/Norm Ridgely (CDN) | Heimrath Racing (CDN) | 73rd | 22nd | 71st | 6 laps - Engine |
World Challenge for Endurance Drivers IMSA - International Motor Sport Association Sebring 12 Hours
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