PORSCHE RACING HISTORYBob Zulkowski (USA)
1979
17 March 1979 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 25 | Porsche 914/6 | 473 29 24107 | GTU | Bob Zulkowski (USA)/Gerard Raney (USA) | Metal Craft Racing (USA) | 60th | 23rd | 47th | 34 laps - DNF |
22 April 1979 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 25 | Porsche 914/6 | 473 29 24107 | GTU | Bob Zulkowski (USA)/Bernie Storc (USA) | Metal Craft Racing (USA) | 41st | 17th | 54th | 42 laps - DNF |
3 June 1979 - Trans-Am Westwood - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 473 29 24107 | TA-I | Bob Zulkowski (USA) | Metal Craft Racing (USA) | 20th | 13th | 14th | 38 laps - Rear End |
7 July 1979 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 473 29 24107 | TA-I | Bob Zulkowski (USA)/Bernie Storc (USA) | Metal Craft Racing (USA) | 33rd | 13th | 33rd | 48 laps - DNF |
21 July 1979 - Trans-Am Road America - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 473 29 24107 | TA-I | Bob Zulkowski (USA) | Metal Craft Racing (USA) | 20th | 12th | 27th | 21 laps |
5 August 1979 - Trans-Am Watkins Glen - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 23 | Porsche 914/6 | 473 29 24107 | TA-I | Bob Zulkowski (USA) | Metal Craft Racing (USA) | 30th | 23rd | 30th | 2 laps - Clutch |