1978 - Portland 100 Miles

6 August 1978 - Portland International Raceway, USA

Peter Gregg wins in a Porsche 935/77A

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

No.	Car	#	Class	Drivers	Entrant	Pos	Class	Grid	Notes
59	Porsche 935/77A	930 890 0018	GTX	Peter Gregg (USA)	Brumos Porsche (USA)	1st	1st	1st	51 laps
30	Porsche 935	930 770 0905	GTX	Gianpiero Moretti (I)	Electrodyne Inc. (I)	2nd	2nd	5th	51 laps
94	Porsche 935/77A	930 890 0023	GTX	Bill Whittington (USA)	Whittington Brothers Racing (USA)	3rd	3rd	4th	50 laps
28	Porsche 935	930 770 0960	GTX	Clif Kearns (USA)	Desperado Racing (USA)	5th	5th	10th	49 laps
93	Porsche 934	930 670 0152	GTX	Don Whittington (USA)	Whittington Brothers Racing (USA)	6th	6th	6th	49 laps
07	Porsche 911 Carrera RSR	911 560 9114	GTO	Dave Cowart (USA)	Morrison's Inc.	8th	1st	14th	48 laps
22	Porsche 911 Carrera RSR		GTO	Bob Bergstrom (USA)	Jeffrey Stephens	9th	2nd	15th	47 laps
60	Porsche 911		GTO	Ren Tilton (USA)		10th	3rd	22nd	45 laps
46	Porsche 911 Carrera RSR	911 360 0865	GTO	Albert Naon (USA)	Mauricio De Narvaez (CO)	11th	4th	18th	44 laps
89	Porsche 911 Carrera RSR		GTO	Bruce Leven (USA)		12th	5th	24th	44 laps
55	Porsche 911 Carrera RSR	911 560 9121	GTO	Howard Meister (USA)		18th	10th	8th	27 laps DNF
58	Porsche 911 Carrera RSR		GTO	Diego Febles (PR)		20th	12th	19th	26 laps