Cummins ISB 6.7 Specs
Cummins ISB 6.7 engine specs: 408 ci (6.7L), 6-cylinder, 4.2126" bore x 4.8819" stroke, 17.3:1 compression.
Dimensions
| Displacement | 408 ci / 6.7 L |
|---|
| Bore | 4.2126" |
|---|
| Stroke | 4.8819" |
|---|
| Cylinders | 6 |
|---|
| Compression ratio | 17.3:1 |
|---|
| Bore/stroke ratio | 0.863 |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | diesel |
|---|
| Advertised HP | 350 hp |
|---|
What these numbers mean
| Bore/stroke character | 0.863 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|
| Mean piston speed at 6,000 RPM | 4,882 ft/min — above the 4,500 ft/min mark where most production bottom ends are considered at their limit |
|---|
| Displacement per cylinder | 68.0 ci |
|---|
| Static compression | 17.3:1 — high enough that pump premium or better is normally required |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| — | — | ISB 6.7 |
| — | 350 hp | ISB 6.7 |
Vehicles (8)
- Ram 2500
- Ram 3500
- Ram 4500
- Ram 5500
- Freightliner M2
- International Durastar
- Blue Bird Vision
- Thomas Built Buses Saf-T-Liner C2
Similar engines
← All 6.7L ISB engines