GMC 316 Specs

GMC 316 engine specs: 316 ci (5.2L), 8-cylinder, 3.8748" bore x 3.2799" stroke, 8.9:1 compression.

Dimensions

Displacement316 ci / 5.2 L
Bore3.8748"
Stroke3.2799"
Cylinders8
Compression ratio8.9:1
Bore/stroke ratio1.181

Construction

Block materialcast iron
Head materialcast iron
ValvetrainOHV
Fuel typegas
Advertised HP205 hp

What these numbers mean

Bore/stroke character1.181 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,280 ft/min — conservative for a street engine
Displacement per cylinder39.5 ci
Static compression8.9:1 — low by modern standards, generally happy on regular pump fuel

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