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Dodge 2-bbl specs: 383 ci (6.3L) 8-cylinder, 4.25 x 3.375 in (108 x 85.7 mm) bore and stroke. Rated 258 hp, 1967–1971. Used in the Dodge D-Series Pickup. OHV.
The Dodge 2-bbl is oversquare — the 4.25" bore exceeds the 3.375" stroke by 25.9% — a layout that favors airflow and RPM over leverage at the crank. The 3.375" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 47.9 ci (785 cc).
It is one of 9 engines in the Dodge 383ci family, all of them 383 ci — the differences between them are in compression, heads and rating, not displacement. 3 factory variants share these dimensions, rated at 258 hp across 1967–1971.
| Displacement | 383 ci / 6.3 L |
|---|---|
| Bore | 4.25" |
| Stroke | 3.375" |
| Cylinders | 8 |
| Configuration | V8 |
| Bore/stroke ratio | 1.259 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 258 hp |
| Years | 1967–1971 |
| Bore/stroke character | 1.259 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,375 ft/min — conservative for a street engine |
| Displacement per cylinder | 47.9 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1967 | 258 hp | 2-bbl |
| 1970 | 258 hp | 2-bbl |
| 1971 | 258 hp | 2-bbl |