| 26.3.1966 | 12 h Sebring | 47 | #018 | Cunningham / Jordan / Fitch | Briggs Cunningham | DNF |
| 26.3.1966 | 12 h Sebring | 54 | #091 | Follmer / Gregg | Porsche Germany | 7th |
| 26.3.1966 | 12 h Sebring | 55 | #005 | Schütz / Glemser | Porsche System Engineering | DNF |
| 26.3.1966 | 12 h Sebring | 56 | #014 | Duval / Kroll | Jacques Duval | 16th |
| 26.3.1966 | 12 h Sebring | 57 | | Ripley / Wetanson | Wetanson & Ripley | DNF |
| 26.3.1966 | 12 h Sebring | 87 | #906-004 | Kolb / Fulp | Keymo Motors Corporation | DNF |
| 26.3.1966 | 12 h Sebring | | #068 | Gregg / Barber | Brumos Porsche | DNA |
| 27.3.1966 | National Zolder | | #084 | Jean-Pierre Gaban | | 2nd |
| 3.4.1966 | SCCA Regional Kirker Creek [AP+BP+CP] | 6 | #015 | Don Wester | | DNA |
| 3.4.1966 | SCCA National Marlboro [AP+BP] | 22 | #080 | Sam Posey | | DNA |
| 11.4.1966 | BRSCC Mallory Park [GT] | 92 | | Jonny Reid | Mefco Racing | raced |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 144 | | Hone / Mould | Mefco Racing | DNA |
| 17.4.1966 | SCCA National Vineland [AP+BP] | | #080 | Sam Posey | | DNF |
| 24.4.1966 | Las Vegas [AP+BP+CP+DP] | 0 | | Norm Smith | | 3rd |
| 24.4.1966 | USRRC Las Vegas | 0 | | Norm Smith | Norman Smith | 16th |
| 24.4.1966 | Coupes de Vitesse | 15 | #063 | "Roy von Vost" | | 5th |
| 24.4.1966 | USRRC Las Vegas | 33 | #087 | Scooter Patrick | Precision Motors Cars | 9th |
| 24.4.1966 | Las Vegas [AP+BP+CP+DP] | 33 | #087 | Scooter Patrick | Otto Zipper | 1st |
| 24.4.1966 | USRRC Las Vegas | 49 | | Dennis Harrison | Dennis Harrison | DNA |
| 24.4.1966 | SCCA Regional Shelton [Main] | | #042 | Wade Carter | | DNS |
| 24.4.1966 | Coupes de Vitesse | | #026 | Fritz Leinenweber | | 2nd |
| 25.4.1966 | 1000 km Monza | 39 | #027? | Barbuscia / Ridolfi | Turillo Barbuscia | DNF |
| 25.4.1966 | 1000 km Monza | 40 | #026 | Weber / Neerpasch | Michael Weber | DNF |
| 25.4.1966 | 1000 km Monza | 41 | #064 | Greger / Leinenweber | Sepp Greger | DNA |
| 30.4.1966 | DARM Trier [S+1.3] | | #032 | Walter Lehmann | | 5th |
| 30.4.1966 | DARM Trier [S+1.3] | | #102 | Rolf Stommelen | | 4th |
| 1.5.1966 | USRRC Riverside | 0 | | Norm Smith | | 12th |
| 1.5.1966 | SCCA National Virginia [AP+BP] | 26 | #080 | Sam Posey | | DNS |
| 8.5.1966 | SCCA Regional Laguna Seca [AP+BP+CP+DP] | 12 | | Norm Smith | | DNA |
| 8.5.1966 | 500 mile Brands Hatch | 22 | | Hone / Morris | Mefco Racing | DNF |
| 8.5.1966 | Targa Florio | 146 | #027 | Barbuscia / Ridolfi | Turillo Barbuscia | DNF |
| 8.5.1966 | Targa Florio | T | #906-001 | Arena / Pucci / Mitter / Bonnier / Herrmann / Glemser | Porsche System Engineering | T-car |
| 8.5.1966 | USRRC Laguna Seca | | | Norm Smith | | DNF |
| 8.5.1966 | Hansa-Pokal Nürburgring | | #102 | Rolf Stommelen | | 3rd |
| 15.5.1966 | SCCA National Cumberland [AP+BP+CP] | 20 | #080 | Sam Posey | Sam Posey | DNA |
| 15.5.1966 | Snetterton | | | Martin Hone | | 2nd |
| 16.5.1966 | Player's Pacific Westwood | 122 | #042 | Wade Carter | | 5th |
| 22.5.1966 | USRRC Bridgehampton | 20 | #080 | Sam Posey | | 21st |
| 28.5.1966 | MCMRC Oulton Park [GT] | 36 | | Martin Hone | Mefco Racing | DNA |
| 28.5.1966 | SCCA National Courtland | 51 | | Madison Smith | | raced |
| 29.5.1966 | Labatt 50 Mont-Tremblant | 58 | #014 | Jacques Duval | G. Lebeau Ltée | 11th |
| 29.5.1966 | Grovewood Trophy Mallory Park [S2.0] | 61 | #097 | John Morris | Mefco Racing | 6th |
| 29.5.1966 | DARM GT Hockenheim | 100 | #102 | Rolf Stommelen | | 2nd |
| 29.5.1966 | DARM GT Hockenheim | 103 | #906-002 | Michel Weber | Michel Weber | DNA |
| 29.5.1966 | DARM GT Hockenheim | | | Peter Ernst | | ?th |
| 30.5.1966 | National Zandvoort [GT] | | | Arie Ruska | | 1st |
| 5.6.1966 | Artukainen [Specials] | 3 | | Antti Aarnio-Wihuri | | 1st |
| 5.6.1966 | 1000 km Nürburgring | 66 | #009 | Frère / Günzler | Zweites Deutsches Fernsehen (ZDF) | DNF |
| 5.6.1966 | Hockenheim | | #089 | Helmut Leuze | | ?th |
| 18.6.1966 | BARC Silverstone [Special GT+1.6/GT1.15] | 169 | #097 | Hone / Mould | J. D. H. Morris | DNA |
| 18.6.1966 | June Sprints Road America [AP+BP+CP] | | #042 | Wade Carter | | 1st |
| 19.6.1966 | Keimola [GT/S] | 4 | | Kari Sohlberg | | 4th |
| 19.6.1966 | Keimola [GT/S] | 5 | | Harald Kronegard | | 5th |
| 19.6.1966 | 24 h Le Mans | 66 | | Cognet / Riviere | Albert Cognet | DNA |
| 19.6.1966 | 24 h Le Mans | 67 | #100 | | Christian Poirot | DNA |
| 19.6.1966 | DARM Mainz-Finthen [S+1.6] | | | Peter Ernst | | 4th |
| 26.6.1966 | Rovaniemi [S/GT] | 38 | | Kari Sohlberg | | 2nd |
| 26.6.1966 | Trophée d'Auvergne | | | Febbrairo | | DNS |
| 2.7.1966 | BRSCC Oulton Park [GT] | 127 | #097 | John Morris | Mefco Racing | 7th |
| 3.7.1966 | SCCA National Courtland [CM+DM+EM+FM+GM+AP+BP+CP] | 55 | | Madison Smith | | 3rd |
| 3.7.1966 | Westwood [AIP+BIP+CIP+DIP+EIP] | | #042 | Wade Carter | | 1st |
| 3.7.1966 | Westwood [Modified+FJr.] | | #042 | Wade Carter | | 2nd |
| 4.7.1966 | SCCA National Lime Rock [AP+BP+CP] | | #080 | Sam Posey | | 3rd |
| 9.7.1966 | Martini Trophy Silverstone [GT+S2.0] | | | Martin Hone | | ?th |
| 10.7.1966 | Pepsi-Cola Mont-Tremblant | 58 | | Jacques Duval | G. Lebeau | 12th |
| 17.7.1966 | DARM Norisring [SP] | 27 | | Peter Ernst | Peter Ernst | ?th |
| 17.7.1966 | DARM Norisring [SP] | 29 | | Helmut Wessel | Helmut Wessel | DNA |
| 17.7.1966 | DARM Norisring [SP] | 36 | #102 | Rolf Stommelen | Rolf Stommelen | NC |
| 17.7.1966 | GP Mugello | 151 | | Barbuscia / Carancini | | NC |
| 17.7.1966 | GP Mugello | 182 | | "Gano" | | DNF |
| 17.7.1966 | GP Mugello | | | Gano | | DNA |
| 23.7.1966 | BRSCC Oulton Park [GT] | 140 | #097 | Martin Hone | Mefco Racing | DNS |
| 30.7.1966 | LCCC Oulton Park [GT] | 153 | #097 | Martin Hone | Mefco Racing | DNS |
| 31.7.1966 | USRRC Kent | 18 | | Jerry Nelson | | 13th |
| 31.7.1966 | USRRC Kent | 22 | #042 | Wade Carter | | 11th |
| 7.8.1966 | 3 h Huíla | | | António Lacerda | | 11th |
| 14.8.1966 | ADAC Zandvoort | | #032 | Walter Lehmann | | 1st |
| 20.8.1966 | H&DLLC Castle Combe [Sports] | 12 | #097 | Hone / Morris | Mefco Racing | DNA |
| 21.8.1966 | 12 h Surfers Paradise | 8 | #906-007 | Hamilton / Reed | Porsche Distributors Pty. Ltd. | 4th |
| 24.8.1966 | Keimola [S2.0] | 3 | | Kari Sohlberg | | raced |
| 28.8.1966 | Hill Climb Sierre Montagna | 92 | #102 | Rolf Stommelen | Rolf Stommelen | DNF |
| 28.8.1966 | Hill Climb Sierre Montagna | 93 | #036 | Rudi Lins | OASC | 5th |
| 28.8.1966 | Hill Climb Sierre Montagna | 94 | #108 | Siegfried Lang | Siegfried Lang | DNA |
| 28.8.1966 | Hill Climb Sierre Montagna | 189 | #906-002 | Michel Weber | Michel Weber | DNA |
| 29.8.1966 | Eagle Trophy Brands Hatch | 124 | #097 | Morris / Hone | Mefco Racing | DNA |
| 4.9.1966 | 500 mile Road America | 18 | | Nelson / Countryman | Nodak Racing Team | DNF |
| 4.9.1966 | ACIF Montlhéry | | | Parot | | 2nd |
| 4.9.1966 | ACIF Montlhéry | | | Pigeaux | | 4th |
| 4.9.1966 | SM Skarpnäck [SP2.0] | | | Harald Kronegard | | raced |
| 11.9.1966 | 500 km Zeltweg | 20 | #036 | Rudi Lins | Rudi Lins | DNA |
| 11.9.1966 | Artukainen [Specials] | 72 | | Antti Aarnio-Wihuri | | 1st |
| 11.9.1966 | Zolder | | #084 | Jean-Pierre Gaban | | 3rd |
| 17.9.1966 | Gold Cup Oulton Park | 44 | #097 | Martin Hone | Mefco Racing | 10th |
| 2.10.1966 | Tulln-Langenlebarn [Sports] | 3 | #102 | Rolf Stommelen | Rolf Stommelen | 4th |
| 2.10.1966 | Tulln-Langenlebarn [Sports] | 11 | #036 | Rudi Lins | Autohaus Lins | 6th |
| 9.10.1966 | 200 mile Kent | 22 | #042 | Wade Carter | | DNA |
| 9.10.1966 | Preis von Tirol [SP2.0] | 91 | #102 | Rolf Stommelen | Fox Racing Team | 5th |
| 9.10.1966 | Preis von Tirol [SP2.0] | 92 | #036 | Rudi Lins | ÖASC | 6th |
| 16.10.1966 | Aspern [SRP] | 73 | #102 | Rolf Stommelen | Fox Racing | 5th |
| 16.10.1966 | Aspern [SRP] | 87 | #036 | Rudi Lins | ÖASC | 9th |