Chevrolet 350ci 12.5:1 Specs
Chevrolet Chevrolet 350ci · 4.065" × 3.370" · 12.5:1 engine specs: 350 ci (5.7L), 8-cylinder, 4.065" bore x 3.37" stroke, 12.5:1 compression.
Dimensions
| Displacement | 350 ci / 5.7 L |
|---|
| Bore | 4.065" |
|---|
| Stroke | 3.37" |
|---|
| Cylinders | 8 |
|---|
| Configuration | V8 |
|---|
| Compression ratio | 12.5:1 |
|---|
| Rod length | 6.35" |
|---|
| Rod ratio | 1.884 |
|---|
| Bore/stroke ratio | 1.206 |
|---|
| Piston deck clearance | 0.01" |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 530–630 hp |
|---|
| Years | 2014–2023 |
|---|
What these numbers mean
| Bore/stroke character | 1.206 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,370 ft/min — conservative for a street engine |
|---|
| Rod ratio | 1.884 — long — less side loading on the cylinder wall, favours high RPM |
|---|
| Displacement per cylinder | 43.8 ci |
|---|
| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
|---|
Cylinder head
| Intake valve diameter | 2.205" |
|---|
| Exhaust valve diameter | 1.615" |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (14)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| 2014 | 530 hp | — |
| 2015 | 530 hp | — |
| 2017 | 580 hp | — |
| 2017 | 590 hp | — |
| 2018 | 580 hp | — |
| 2018 | 590 hp | — |
| 2019 | 600 hp | — |
| 2019 | 630 hp | — |
| 2020 | 600 hp | — |
| 2020 | 630 hp | — |
| 2022 | 600 hp | — |
| 2022 | 630 hp | — |
| 2023 | 600 hp | — |
| 2023 | 630 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
← All Chevrolet 350ci engines