Free eprom codes
The following Ontronic eprom codes are copyright-free and can be downloaded. Please use our free software to open and modify them. An eprom file includes all engine parameters (maps and engine characteristics). Base maps can also be used for other programmable engine management systems. Please contact the Ontronic technical support if you need a more specific development basis.
Eprom codes for naturally aspirated engines
| Number of cylinders | Trigger disk reference teeth | Number of tooth | General offset angle | Phasing | Max rpm | Max advance | Download |
|---|---|---|---|---|---|---|---|
| 4 | additional | 18 | 90 | no | 7500 | 28.0 |  |
| 4 | additional | 24 | 90 | no | 7500 | 32.0 | |
| 4 | additional | 24 | 90 | yes | 8500 | 30.0 | |
| 4 | additional | 24 | 90 | yes | 8500 | 34.0 | |
| 4 | missing | 24 | 90 | yes | 9500 | 30.0 | |
| 4 | missing | 24 | 90 | yes | 9500 | 34.0 | |
| 4 | 2 missing | 60 | 112 | no | 8500 | 28.0 | |
| 4 | 2 missing | 60 | 112 | yes | 8500 | 32.0 | |
| 6 | additional | 24 | 90 | yes | 9500 | 28.0 | |
| 6 | additional | 24 | 90 | yes | 9500 | 32.0 | |
| 6 | 2 missing | 60 | 112 | yes | 9000 | 28.0 | |
| 6 | 2 missing | 60 | 112 | yes | 9000 | 32.0 | |
| 8 | additional | 24 | 90 | no | 6500 | 26.0 | |
| 8 | additional | 24 | 90 | no | 7500 | 28.0 | |
| 8 | additional | 60 | 120 | no | 8500 | 30.0 | |
Eprom codes for supercharged engines
| Number of cylinders | Trigger disk reference teeth | Number of tooth | General offset angle | Phasing | Max rpm | Max advance | Download |
|---|---|---|---|---|---|---|---|
| 4 | additional | 24 | 90 | no | 7500 | 22.0 | |
| 4 | missing | 24 | 90 | yes | 8000 | 23.0 | |
| 4 | 2 missing | 60 | 112 | yes | 9000 | 24.0 | |
| 6 | additional | 24 | 90 | no | 7500 | 22.0 | |
| 6 | missing | 24 | 90 | yes | 8000 | 23.0 | |
| 6 | 2 missing | 60 | 112 | yes | 9000 | 24.0 | |
| 8 | additional | 18 | 90 | no | 8000 | 24.0 | |