| compression ratio → IsA → 10:1 | 0.57 | |
| compression ratio → IsA → 11.5:1 | 0.56 | |
| compression ratio → IsA → 9.5:1 | 0.56 | |
| compression ratio → IsA → 8.8:1 | 0.52 | |
| compression ratio → IsA → 12.5:1 | 0.49 | |
| compression ratio → IsA → 14:1 | 0.42 | |
| compression ratio → IsA → the bore | 0.29 |