Turbo Manifold Dimensions
Exhaust manifold dimensions has a significant impact on engine characteristics especially for turbo charged engines.
The below table provides a base line for exhaust manifold dimensions for turbo charged engines.
Note: Use smaller diameter tubes for widest power band and larger size where top-end power is more important and sluggish throtttle response is acceptable.
| Engine Type | Engine Configuration | Exhaust Tube Diameter (inches) |
|---|---|---|
| 4 Cylinder Single Turbo |
1300cc | 1.25-1.5 |
| 1600cc | 1.25-1.625 | |
| 2000cc | 1.375-1.75 | |
| 2200cc | 1.375-1.75 | |
| 2400cc | 1.5-1.875 | |
| 6 Cylinder Single Turbo |
2000cc | 1.125-1.5 |
| 2300cc | 1.25-1.5 | |
| 2500cc | 1.25-1.625 | |
| 6 Cylinder Twin Turbo |
2600cc | 1.25-1.625 |
| 3000cc | 1.375-1.75 | |
| 3500cc | 1.5-1.75 | |
| 4000cc | 1.625-1.75 | |
| 8 Cylinder Twin Turbo |
4000cc | 1.375-1.62 |
| 5000cc | 1.5-1.625 | |
| 5700cc | 1.5-1.75 | |
| 7000cc | 1.75-2.125 | |
| 8200cc | 1.875-2.375 |
