1978 - Sears Point 100 Miles

30 July 1978 - Sears Point International Raceway, USA

Don Whittington second in a Porsche 934/5, 1m,2s behind the winning BMW 320 i Turbo driven by David Hobbs

Overall - 2nd, 3rd : GTX - 2nd, 3rd : GTO - 1st, 3rd

No.	Car	#	Class	Drivers	Entrant	Pos	Class	Grid	Notes
93	Porsche 934	930 670 0152	GTX	Don Whittington (USA)	Whittington Brothers Racing (USA)	2nd	2nd	3rd	40 laps
30	Porsche 935	930 770 0905	GTX	Gianpiero Moretti (I)	Electrodyne Inc. (I)	3rd	3rd	7th	39 laps
0	Porsche 935/77A	930 890 0021	GTX	Ted Field (USA)	Interscope Racing (USA)	5th	5th	9th	39 laps
55	Porsche 911 Carrera RSR	911 560 9121	GTO	Howard Meister (USA)		6th	1st	11th	38 laps
71	Porsche 934/5	930 770 0954	GTX	Bruce Canepa (USA)		7th	6th	13th	38 laps
28	Porsche 935	930 770 0960	GTX	Clif Kearns (USA)	Desperado Racing (USA)	8th	7th	15th	38 laps
75	Porsche 911 Carrera RSR	911 360 0601	GTX	Bob Harmon (USA)		9th	8th	17th	38 laps
46	Porsche 911 Carrera RSR	911 360 0865	GTO	Mauricio DeNarváez (COL)	Mauricio De Narvaez (CO)	10th	3rd	16th	37 laps
60	Porsche 911		GTO	Ren Tilton (USA)		12th	4th	23rd	36 laps
58	Porsche 911 Carrera RSR		GTO	Diego Febles (PR)		13th	5th	27th	35 laps
22	Porsche 911 Carrera RSR		GTO	Jeffrey Stephens (USA)		14th	6th	22nd	33 laps - DNF
07	Porsche 911 Carrera RSR	911 560 9114	GTO	Dave Cowart (USA)	Morrison's Inc.	16th	8th	8th	26 laps
41	Porsche 911 Carrera RSR	911 460 0059	GTO	Bill Hanel (USA)		20th	10th	14th	20 laps - DNF
94	Porsche 935/77A	930 890 0023	GTX	Bill Whittington (USA)	Whittington Brothers Racing (USA)	23rd	12th	5th	10 laps - DNF
32	Porsche 911 Carrera RSR	911 460 9048	GTX	Steve Earle (USA)	Earle Akin Racing Associates (USA)	24th	13th	12th	9 laps - DNF
59	Porsche 935/77A	930 890 0018	GTX	Peter Gregg (USA)	Brumos Porsche (USA)	26th	14th	28th	3 laps - DNF
11	Porsche 911 S		GTO	Gary Nylander (USA)		27th	13th	21st	0 laps - DNF