Chevrolet LS6 Specs

Chevrolet LS6 engine specs: 346 ci (5.7L), 8-cylinder, 3.9" bore x 3.622" stroke, 10.5:1 compression.

Dimensions

Displacement346 ci / 5.7 L
Bore3.9"
Stroke3.622"
Cylinders8
Compression ratio10.5:1
Bore/stroke ratio1.077

Construction

Block materialaluminum
Head materialaluminum
ValvetrainOHV
Fuel typegas
Advertised HP385 hp

What these numbers mean

Bore/stroke character1.077 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,622 ft/min — in the range typical of performance street engines
Displacement per cylinder43.3 ci
Static compression10.5:1 — in the range that usually runs on pump premium

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