Chevrolet 346ci specs: 3.898 x 3.622 in (99 x 92 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 346 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.898" |
| Stroke | 3.622" |
| Compression | 10.2–10.5:1 |
| Advertised power | 305–405 hp |
| Years | 1998–2004 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Chevrolet 346ci · 3.898" × 3.622" · 10.2:1 | 346 ci | 3.898" × 3.622" | 10.2:1 | 305–350 |
| Chevrolet 346ci · 3.898" × 3.622" · 10.5:1 | 346 ci | 3.898" × 3.622" | 10.5:1 | 405 |
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.