GMC 194 Specs

GMC 194 engine specs: 194 ci (3.2L), 6-cylinder, 3.625" bore x 3.2" stroke, 8.5:1 compression.

Dimensions

Displacement194 ci / 3.2 L
Bore3.625"
Stroke3.2"
Cylinders6
Compression ratio8.5:1
Bore/stroke ratio1.133
Piston deck clearance0.256"

Construction

Block materialcast iron
Head materialcast iron
ValvetrainOHV
Fuel typegas
Advertised HP120 hp

What these numbers mean

Bore/stroke character1.133 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,200 ft/min — conservative for a street engine
Displacement per cylinder32.3 ci
Static compression8.5:1 — low by modern standards, generally happy on regular pump fuel

Cylinder head

Intake valve diameter1.5"
Exhaust valve diameter1.313"
Chamber volume42.6 cc
Rocker ratio1.6:1
Lifter typehydraulic

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Similar engines

Source: NHRA blueprints — nhra.net blueprints

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