Chevrolet 327ci 11:1 Specs
Chevrolet Chevrolet 327ci · 4.001" × 3.25" · 11:1 engine specs: 327 ci (5.4L), 8-cylinder, 4.001" bore x 3.25" stroke, 11:1 compression.
Dimensions
| Displacement | 327 ci / 5.4 L |
|---|
| Bore | 4.001" |
|---|
| Stroke | 3.25" |
|---|
| Cylinders | 8 |
|---|
| Compression ratio | 11:1 |
|---|
| Rod length | 5.7" |
|---|
| Rod ratio | 1.754 |
|---|
| Bore/stroke ratio | 1.231 |
|---|
| Piston deck clearance | 0.002" |
|---|
Construction
| Induction | 1-4 |
|---|
| Advertised HP | 325–365 hp |
|---|
| Years | 1965–1968 |
|---|
What these numbers mean
| Bore/stroke character | 1.231 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,250 ft/min — conservative for a street engine |
|---|
| Rod ratio | 1.754 — long — less side loading on the cylinder wall, favours high RPM |
|---|
| Displacement per cylinder | 40.9 ci |
|---|
| Static compression | 11:1 — high enough that pump premium or better is normally required |
|---|
Cylinder head
| Intake valve diameter | 2.023" |
|---|
| Exhaust valve diameter | 1.605" |
|---|
| Chamber volume | 58.6 cc |
|---|
| Rocker ratio | 1.5:1 |
|---|
| Lifter type | hydraulic |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (7)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| 1965 | 350 hp | — |
| 1965 | 365 hp | — |
| 1966 | 350 hp | — |
| 1967 | 325 hp | — |
| 1967 | 350 hp | — |
| 1968 | 325 hp | — |
| 1968 | 350 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
← All Chevrolet 327ci engines