| 5.6.1966 | 1000 km Nürburgring | 105 | 911 | Günter Wallrabenstein | G. Wallrabenstein | DNQ |
| 5.6.1966 | 1000 km Nürburgring | 116 | 356 | Otto / Klasen | Renngemeinschaft Nürburgring | DNA |
| 5.6.1966 | Zandvoort [GT/S] | | | Günter Werlich | | 1st |
| 5.6.1966 | Zandvoort [GT/S] | | 356 B | Udo Trapmann | | ?th |
| 5.6.1966 | SCCA National Vineland [CSR+DSR+ESR+FSR] | | 906 | Ed Hugus | | raced |
| 12.6.1966 | Rose Cup Portland | 356 | 906 | Gary Wright | | DNF |
| 12.6.1966 | Hockenheim [GT/S] | | | Wolfgang Fertig | | ?th |
| 12.6.1966 | SCCA Mid-America [CM+DM+EM+FM+GM+AP+BP+CP+DP+EP] | | | James King | | 2nd |
| 12.6.1966 | SCCA Mid-America [CM+DM+EM+FM+GM+AP+BP+CP+DP+EP] | | | Jim Giese | | 1st |
| 18.6.1966 | BARC Silverstone [Special GT+1.6/GT1.15] | 169 | 904 GTS | Hone / Mould | J. D. H. Morris | DNA |
| 18.6.1966 | BEMC National Mosport [GT/S1.6] | | 356 Carrera | Reinhold Schill | | 2nd |
| 18.6.1966 | BEMC National Mosport [Dunlop Trophy] | | 718 RS 61 | Wayne Kelly | | DNF |
| 18.6.1966 | BEMC National Mosport [Novice] | | 356 Carrera | Jack Evans | | 1st |
| 18.6.1966 | BEMC National Mosport [Dunlop Trophy] | | 718 RS 61 | Rudy Bartling | | 2nd |
| 18.6.1966 | June Sprints Road America [AP+BP+CP] | | 904 GTS | Wade Carter | | 1st |
| 19.6.1966 | Keimola [GT/S] | 1 | 906 | Antti Aarnio-Wihuri | | 1st |
| 19.6.1966 | Keimola [GT/S] | 2 | 906 | Ulf Norinder | | 3rd |
| 19.6.1966 | Keimola [GT/S] | 3 | 906 | Boo Johansson | | 2nd |
| 19.6.1966 | Keimola [GT/S] | 4 | 904 GTS | Kari Sohlberg | | 4th |
| 19.6.1966 | Keimola [GT/S] | 5 | 904 GTS | Harald Kronegard | | 5th |
| 19.6.1966 | Keimola [GT/S] | 6 | 911 | Leo Kinnunen | | raced |
| 19.6.1966 | Keimola [GT/S] | 7 | 356 GS Carrera 2 | Erkki Broman | | raced |
| 19.6.1966 | Keimola [GT/S] | 10 | 912 | Reino Salo | | raced |
| 19.6.1966 | DARM Mainz-Finthen [S+1.6] | 11 | 906 | Gerhard Mitter | Scuderia Lufthansa | 1st |
| 19.6.1966 | Hockenheim [S+1.6/R+1.1] | 11 | 356 2000 GS Carrera | Peter Korda | Peter Korda | 7th |
| 19.6.1966 | DARM Mainz-Finthen [S+1.6] | 12 | 906 | Gijs van Lennep | Racing Team Holland | 3rd |
| 19.6.1966 | Hockenheim [S+1.6/R+1.1] | 12 | 356 B 2000 GS Carrera | René Froidevaux | Ecurie des Lions | 9th |
| 19.6.1966 | Hockenheim [S+1.6/R+1.1] | 13 | 906 | Hans Kühnis | Ecurie Basilisk | 3rd |
| 19.6.1966 | DARM Mainz-Finthen [S+1.6] | 14 | 906 | Ben Pon | Racing Team Holland | 2nd |
| 19.6.1966 | Hockenheim [S+1.6/R+1.1] | 14 | 906 | Dieter Spoerry | FRC | DNA |
| 19.6.1966 | Hockenheim [S+1.6/R+1.1] | 15 | 906 | André Wicky | Wicky Racing Teram | DNA |
| 19.6.1966 | 24 h Le Mans | 30 | 906 LH | Siffert / Davis | Porsche System Engineering | 4th |
| 19.6.1966 | 24 h Le Mans | 31 | 906 LH | Herrmann / Linge | Porsche System Engineering | 5th |
| 19.6.1966 | 24 h Le Mans | 31 | 906 | Robert Buchet | Robert Buchet | DNA |
| 19.6.1966 | 24 h Le Mans | 32 | 906 LH | Schütz / de Klerk | Porsche System Engineering | 6th |
| 19.6.1966 | 24 h Le Mans | 33 | 906 | Gregg / Axelsson | Porsche System Engineering | DNF |
| 19.6.1966 | 24 h Le Mans | 34 | 906 | Buchet / Koch | Auguste Veuillet | DNF |
| 19.6.1966 | 24 h Le Mans | 35 | 911 S | Kerguen / "Franc" | "J. Franc" | 14th |
| 19.6.1966 | June Sprints Road America [SR] | 56 | 906 | Ralph Trieschmann | | 2nd |
| 19.6.1966 | 24 h Le Mans | 56 | 906 | Colin Davis | Porsche System Engineering | DNA |
| 19.6.1966 | 24 h Le Mans | 58 | 906 | Klass / Stommelen | Porsche System Engineering | 7th |
| 19.6.1966 | 24 h Le Mans | 60 | 906 | Mike de Udy | W. H. Aldington | DNA |
| 19.6.1966 | 24 h Le Mans | 66 | 904 GTS | Cognet / Riviere | Albert Cognet | DNA |
| 19.6.1966 | 24 h Le Mans | 67 | 904 GTS | | Christian Poirot | DNA |
| 19.6.1966 | June Sprints Road America [SR] | 69 | 906 | Lee Hall | E. L. Hall | 5th |
| 19.6.1966 | Hockenheim [GT+1.15] | 178 | 911 | August Danzeisen | Scuderia Basilea | 7th |
| 19.6.1966 | DARM Mainz-Finthen [GT+1.3] | | 911 | Klaus Herbort | | ?th |
| 19.6.1966 | DARM Mainz-Finthen [GT+1.3] | | 911 | Carl-Gregor Auer | | 3rd |
| 19.6.1966 | DARM Mainz-Finthen [S1.6] | | 356 GS Carrera | Erwin Kremer | | DNF |
| 19.6.1966 | DARM Mainz-Finthen [GT+1.3] | | 911 | Heinz Billo | | DNF |
| 19.6.1966 | DARM Mainz-Finthen [S1.6] | | 356 C 1600 SC | Dieter Kern | | 4th |
| 19.6.1966 | DARM Mainz-Finthen [S+1.6] | | 904 GTS | Peter Ernst | | 4th |
| 19.6.1966 | DARM Mainz-Finthen [GT+1.3] | | 911 | Günter Besier | | 1st |
| 19.6.1966 | DARM Mainz-Finthen [S1.6] | | 356 GS Carrera | Bernd Seidel | | 3rd |
| 24.6.1966 | SM Falmarksbanan [SP2.0] | 1 | 906 | Sten Axelsson | Botkyrka MK | 1st |
| 24.6.1966 | SM Falmarksbanan [GT2.0] | 2 | 911 | Leif Hansen | Botkyrka MK | 3rd |
| 24.6.1966 | SM Falmarksbanan [GT2.0] | 4 | 356 Super 90 | Bengt Ekberg | KAK/U | 8th |
| 24.6.1966 | SM Falmarksbanan [GT2.0] | 6 | 356 Carrera | Ingemar Nordström | | DNA |
| 24.6.1966 | SM Falmarksbanan [GT2.0] | 8 | | Bertil Lindberg | | DNA |
| 24.6.1966 | SM Falmarksbanan [SP2.0] | 8 | 906 | Ulf Norinder | KAK | 2nd |
| 25.6.1966 | Watkins Glen [Production] | 35 | 356 Speedster | George Morris | George F. Morris | DNA |
| 25.6.1966 | Watkins Glen [Production] | 73 | | Harry A. Duckworth | Harry A. Duckworth | DNA |
| 26.6.1966 | GP Watkins Glen | 1 | 906 | Charlie Kolb | Schroeder Imported Motor Corp. | DNF |
| 26.6.1966 | GP Watkins Glen | 4 | 906 | Peter Gregg | Brumos Porsche Corp. | 9th |
| 26.6.1966 | GP Watkins Glen | 7 | 906 | Joe Buzzetta | Porsche Corp. of America | DNF |
| 26.6.1966 | GP Watkins Glen | 15 | 906 | Herb Wetanson | Herb Wetanson | 7th |
| 26.6.1966 | GP Watkins Glen | 33 | 906 | Scooter Patrick | | DNS |
| 26.6.1966 | Rovaniemi [S/GT] | 37 | 906 | Antti Aarnio-Wihuri | | 1st |
| 26.6.1966 | Rovaniemi [S/GT] | 38 | 904 GTS | Kari Sohlberg | | 2nd |
| 26.6.1966 | Avus [S/GT] | 41 | 906 | Ben Pon | Racing Team Holland | 3rd |
| 26.6.1966 | Avus [S/GT] | 42 | 906 | Gijs van Lennep | Racing Team Holland | DNF |
| 26.6.1966 | Avus [S/GT] | 43 | 906 | Gerhard Koch | Gerhard Koch | 2nd |
| 26.6.1966 | Avus [S/GT] | 44 | 906 | Udo Schütz | Scuderia Lufthansa | 1st |
| 26.6.1966 | Avus [S/GT] | 51 | 356 Carrera | Peter Liersch | Peter Liersch | DNA |
| 26.6.1966 | Avus [S/GT] | 53 | 356 B | Franz Rühl | Franz Rühl | DNA |
| 26.6.1966 | Avus [S/GT] | 54 | 356 1600 Super | Manfred Ziemer | Manfred Ziemer | DNA |
| 26.6.1966 | GP Watkins Glen | 56 | 906 | Ralph Trieschmann | | 6th |
| 26.6.1966 | GP Watkins Glen | 87 | 906 | Bill Bowman | William S. Bowman | DNS |
| 26.6.1966 | SCCA National Kent [Modified] | | 906 | Gary Wright | | DNA |
| 26.6.1966 | Trophée d'Auvergne | | 904 GTS | Febbrairo | | DNS |
| 26.6.1966 | GP Watkins Glen | | 906 | Ken Miles | | DNS |
| 26.6.1966 | SCCA National Kent [Modified] | | | R. K. Smith | | DNF |
| 2.7.1966 | BAC Regionals Harewood Acres [Challenge Cup] | 8 | 550 RS | Dave Wolin | Dave Wolin | DNA |
| 2.7.1966 | BAC Regionals Harewood Acres [Challenge Cup] | 45 | 718 RS 61 | Rudy Bartling | Air Cool Machine Shop | 3rd |
| 2.7.1966 | BAC Regionals Harewood Acres [Challenge Cup] | 81 | 718 RS 61 | Wayne Kelly | Leavens London Motors | DNA |
| 2.7.1966 | BRSCC Oulton Park [GT] | 127 | 904 GTS | John Morris | Mefco Racing | 7th |
| 3.7.1966 | Dalsland [GT2.0] | 13 | 911 | Leif Hansen | | 5th |
| 3.7.1966 | Dalsland [GT2.0] | 15 | | Hans Sundberger | | DNA |
| 3.7.1966 | SCCA National Courtland [CM+DM+EM+FM+GM+AP+BP+CP] | 17 | 906 | Charlie Kolb | | 1st |
| 3.7.1966 | Montes Claros | 26 | 356 B | Joăo Paulo Sottomayor | | raced |
| 3.7.1966 | SCCA National Greenwood [CP+DP+EP] | 27 | 356 | Don McIntosh | | 6th |
| 3.7.1966 | Montes Claros | 28 | 356 B 2000 GS Carrera GT | Américo Nunes | | raced |
| 3.7.1966 | SCCA National Courtland [CM+DM+EM+FM+GM+AP+BP+CP] | 55 | 904 GTS | Madison Smith | | 3rd |
| 3.7.1966 | SCCA National Courtland [CM+DM+EM+FM+GM+AP+BP+CP] | 81 | 718 | | | raced |
| 3.7.1966 | SCCA National Greenwood [CP+DP+EP] | 91 | 356 Speedster | Walt Hotchkiss | | 12th |
| 3.7.1966 | Westwood [AIP+BIP+CIP+DIP+EIP] | | 356 1600 Normal | Scott Taylor | | 2nd |
| 3.7.1966 | Westwood [Handicap] | | 718 RSK | Paul Woodroffe | | 1st |
| 3.7.1966 | Westwood [AIP+BIP+CIP+DIP+EIP] | | 356 B Super 90 | Gary Wright | | 3rd |
| 3.7.1966 | Westwood [Modified+FJr.] | | 904 GTS | Wade Carter | | 2nd |
| 3.7.1966 | Westwood [AIP+BIP+CIP+DIP+EIP] | | 904 GTS | Wade Carter | | 1st |