1975 | Abandono | 57 | Porsche Carrera RSR | John Rulon-Miller/Tom Waugh/Serge Godard |
1976 | 14º (1º IMSA) | 77 | Porsche Carrera RSR | John Rulon-Miller/Tom Vaugh/Jean-Pierre Laffeach |
1977 | Abandono | 78 | Porsche Carrera RSR | John Rulon-Miller/John Cooper/Peter C. Lovett |
1978 | 14º (2º IMSA) | 97 | Porsche Carrera RS | Larry Perkins/Gordon Spice/John Rulon-Miller |