| Date | Place |
Division |
Start |
Finish | Owner |
# |
Car | Laps | Money | Status | Laps Led |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 30 1977 | Lime Rock Park | IMSA GT | 26 | 30 | 83 | Porsche 911 | 46 | running | |||
| Aug 14 1977 | Pocono International Raceway | IMSA GT | 34 | 19 | 29 | Mazda RX-3 | 28 | running | |||
| Feb 5 1978 | Daytona International Speedway | IMSA GT/World Sports Car Championship | 54 | 63 | Z & W Enterprises | 27 | Mazda RX-3 | 57 | did not finish | ||
| May 29 1978 | Lime Rock Park | IMSA GTU | 12 | 17 | 77 | Porsche 911 | 6 | did not finish | |||
| Jul 8 1978 | Watkins Glen International | WSCC/SCCA Trans Am | 37 | 39 | Z & W Enterprises | 74 | Porsche 911S | 18 | accident | 0 | |
| Feb 4 1979 | Daytona International Speedway | IMSA GT/World Sports Car Championship | 41 | 30 | Bill Scott Racing | 71 | Porsche 911 | 388 | did not finish | ||
| Mar 17 1979 | Sebring International Raceway | IMSA GT | 37 | 43 | Bill Scott Racing-Z&W | 72 | Porsche 911 | 99 | did not finish | ||
| May 28 1979 | Lime Rock Park | IMSA GTU | 17 | 17 | 71 | Porsche 911 | 2 | did not finish | |||
| Feb 3 1980 | Daytona International Speedway | IMSA GT/World Sports Car Championship | 43 | 12 | Z & W Enterprises | 73 | Mazda RX-7 | 546 | running | ||
| Mar 22 1980 | Sebring International Raceway | IMSA GT | 37 | 44 | Z & W Enterprises | 73 | Mazda RX-7 | 118 | did not finish | ||
| Apr 27 1980 | Riverside International Raceway | IMSA GT | 29 | 11 | Hector Huerta | 89 | Porsche Carrera | 147 | running | ||
| May 11 1980 | Silverstone Circuit | FIA World Sports Car Championship | 22 | 9 | Z & W Enterprises Racing Inc. | 12 | Mazda RX-7 | 206 | running | ||
| May 25 1980 | Nürburgring | FIA World Sports Car Championship | 31 | 44 | Z & W Enterprises Racing | 204 | Mazda RX-7 GTP | 22 | did not finish | ||
| Jun 15 1980 | Circuit de la Sarthe | FIA World Sports Car Championship | 53 | 21 | Z. et W. Enterprises Inc. | 86 | Mazda RX-7 | 267 | running | ||
| Aug 17 1980 | Mosport International Raceway | IMSA GT | 28 | 13 | Z & W Enterprises | 73 | Mazda RX-7 | 208 | running | ||
| Aug 31 1980 | Road America | IMSA GT | 33 | 12 | Z & W Enterprises | 73 | Mazda RX-7 | 111 | running | ||
| Nov 30 1980 | Daytona International Speedway | IMSA GT | 49 | 37 | Z & W Enterprises | 73 | Mazda RX-7 | 42 | did not finish | ||
| Mar 21 1981 | Sebring International Raceway | IMSA GT/World Sports Car Championship | 72 | 61 | Z & W Enterprises | 75 | Mazda RX-7 | 60 | out of fuel | ||
| Apr 26 1981 | Autodromo Nazionale di Monza | FIA World Sports Car Championship | 32 | 25 | Z & W Enterprises | 9 | Mazda RX-7 | 39 | collision | ||
| May 24 1981 | Nürburgring | FIA World Sports Car Championship | 42 | 19 | Z & W Enterprises | 61 | Mazda RX-7 | 14 | running | ||
| Aug 16 1981 | Mosport International Raceway | IMSA GT/World Sports Car Championship | 13 | 31 | Z & W Enterprises | 39 | Mazda RX-7 | 34 | accident | ||
| Feb 6 1983 | Daytona International Speedway | IMSA GT | 32 | 8 | Z & W Enterprises | 77 | Mazda GTP | 553 | running | ||
| Feb 27 1983 | Bicentennial Park | IMSA GTP | 24 | 31 | Z & W Enterprises Racing | 77 | Mazda GTP | 4 | did not finish | 0 | |
| Mar 19 1983 | Sebring International Raceway | IMSA GT | 18 | 66 | Z & W Enterprises | 77 | Mazda GTP | 61 | engine | ||
| Sep 11 1983 | Pocono International Raceway | IMSA GT | 17 | 15 | Z & W Enterprises | 77 | Mazda GTP | 143 | did not finish | ||
| Nov 27 1983 | Daytona International Speedway | IMSA GT | 25 | 45 | Z & W Enterprises | 77 | Mazda GTP | 64 | did not finish | ||
| Feb 5 1984 | Daytona International Speedway | IMSA GT | 38 | 54 | Z & W Enterprises | 70 | Mazda GTP | 187 | accident | ||
| Apr 8 1984 | Road Atlanta | IMSA GT | 26 | 14 | Toyota Village | 12 | Osella PA10 FA-2000-001/BMW | 111 | running | ||
| May 28 1984 | Lime Rock Park | IMSA GTP | 12 | 9 | Z&W Motorsports | 70 | Mazda GTP | 51 | running | ||
| Jun 10 1984 | Mid-Ohio Sports Car Course | IMSA GT | 48 | 43 | Toyota Village | 12 | Osella PA10 FA-2000-001/BMW | 23 | did not finish | ||
| Aug 26 1984 | Road America | IMSA GT | 23 | 13 | Z & W Enterprises | 70 | Mazda GTP | 107 | 1,300 | running | |
| Sep 9 1984 | Pocono International Raceway | IMSA GT | 17 | 15 | Z&W Motorsports | 70 | Mazda GTP | 95 | running | ||
| Sep 8 1985 | Pocono International Raceway | IMSA GT | 14 | 10 | Z & W Enterprises | 70 | Mazda GTP | 110 | running | ||
| Oct 12 1985 | Watkins Glen International | IMSA Firestone Firehawk | 9 | Honda CRX | 489 | 1,250 | |||||
| Jun 14 1986 | Watkins Glen International | IMSA Firestone Firehawk | 23 | 12 | 70 | Mazda RX-7 | 521 | 700 | running | ||
| Jul 6 1986 | Watkins Glen International | IMSA GT | 20 | 36 | Z & W Enterprises | 70 | Denali Speedcar/Mazda | 97 | did not finish | ||
| Aug 9 1986 | Lime Rock Park | IMSA Firestone Firehawk | 10 | 16 | 91 | Mazda RX-7 | 124 | 200 | running | ||
| Aug 24 1986 | Road America | IMSA GT | 30 | 8 | Z & W Motorsports | 70 | Denali - Mazda GTP | 113 | 4,500 | running | |
| Sep 20 1986 | Watkins Glen International | IMSA Firestone Firehawk | 38 | 35 | 70 | Mazda RX-7 | 64 | 400 | running | ||
| Oct 5 1986 | Columbus Street Circuit | IMSA GTP/Lights | 22 | 12 | Z & W Motorsports | 70 | Denali - Mazda GTP | 123 | running | ||
| Oct 12 1986 | Riverside International Raceway | IMSA Firestone Firehawk | 34 | 21 | 70 | Mazda RX-7 | 149 | 1,700 | running | ||
| Oct 26 1986 | Firebird International Raceway | IMSA Firestone Firehawk | 24 | 42 | 70 | Maxda RX-7 | 152 | 300 | did not finish | ||
| Jul 5 1987 | Watkins Glen International | IMSA GTP/Lights | 12 | 5 | Z&W | 70 | Denali - Mazda | 121 | 9,150 | running | |
| Aug 16 1987 | Road America | IMSA GT | 17 | 22 | Z & W Motorsports | 70 | Denali - Mazda | 69 | running | ||
| Oct 4 1987 | Columbus Street Circuit | IMSA GTP/Lights | 18 | 13 | Z & W Motorsports | 70 | Denali - Mazda | 73 | 5,000 | running |