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Chevrolet LSX376-B15 specs: 376 ci (6.2L) 8-cylinder, 4.065 x 3.622 in (103.3 x 92 mm) bore and stroke, 10.8:1 compression. Rated 530 hp. OHV.
The Chevrolet LSX376-B15 is oversquare — the 4.065" bore exceeds the 3.622" stroke by 12.2% — a layout that favors airflow and RPM over leverage at the crank. 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 47.0 ci (770 cc).
10.8:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 57 engines in the LS family, sitting between the 293 ci and 454 ci members.
| Displacement | 376 ci / 6.2 L |
|---|---|
| Bore | 4.065" |
| Stroke | 3.622" |
| Cylinders | 8 |
| Compression ratio | 10.8:1 |
| Bore/stroke ratio | 1.122 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 530 hp |
| Bore/stroke character | 1.122 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 47.0 ci |
| Static compression | 10.8:1 — in the range that usually runs on pump premium |
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