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Chevrolet LMG / LC9 specs: 325 ci (5.3L) 8-cylinder, 3.78 x 3.622 in (96 x 92 mm) bore and stroke. Rated 315-320 hp, 2010–2014.
The Chevrolet LMG / LC9 is close to square: 3.7799" bore against 3.622" stroke, within 4.4%, which splits the difference between a high-revving layout and a torque layout. The 3.622" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 40.6 ci (666 cc).
It is one of 57 engines in the LS family, sitting between the 293 ci and 454 ci members. 10 factory variants share these dimensions, rated from 315 to 320 hp across 2010–2014.
| Displacement | 325 ci / 5.3 L |
|---|---|
| Bore | 3.7799" |
| Stroke | 3.622" |
| Cylinders | 8 |
| Configuration | V8 |
| Bore/stroke ratio | 1.044 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 315–320 hp |
| Years | 2010–2014 |
| Bore/stroke character | 1.044 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 40.6 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 |
|---|---|---|
| 2010 | — | LMG / LC9 |
| 2010 | 315 hp | LMG / LC9 |
| 2010 | 320 hp | LMG / LC9 |
| 2011 | 315 hp | LMG / LC9 |
| 2011 | 320 hp | LMG / LC9 |
| 2012 | 315 hp | LMG / LC9 |
| 2012 | 320 hp | LMG / LC9 |
| 2013 | 315 hp | LMG / LC9 |
| 2013 | 320 hp | LMG / LC9 |
| 2014 | 320 hp | LMG / LC9 |