Pontiac OHC-6 9:1 Specs

Pontiac Pontiac OHC-6 · 3.874" × 3.252" · 9:1 engine specs: 230 ci (3.8L), 6-cylinder, 3.874" bore x 3.252" stroke, 9:1 compression.

Dimensions

Displacement	230 ci / 3.8 L
Bore	3.874"
Stroke	3.252"
Cylinders	6
Compression ratio	9:1
Bore/stroke ratio	1.191

Construction

Block material	cast iron
Head material	cast iron
Valvetrain	SOHC
Fuel type	gas
Advertised HP	160–165 hp

What these numbers mean

Bore/stroke character	1.191 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM	3,252 ft/min — conservative for a street engine
Displacement per cylinder	38.3 ci
Static compression	9:1 — low by modern standards, generally happy on regular pump fuel

Run the numbers for this engine

Each link opens the calculator with this engine's specs already filled in.

• Displacement calculator
• Compression ratio calculator
• Piston ring gap calculator
• Piston speed calculator
• Carburetor CFM calculator

Variants sharing these dimensions (4)

These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.

Year	Advertised HP	Code
—	160 hp	230
—	165 hp	230 OHC-6
—	165 hp	OHC-6
—	165 hp	230, 230 OHC, 230 OHC-6, OHC-6, OHC-6 (1-barrel)

Vehicles (6)

• Pontiac Tempest
• Pontiac LeMans
• Pontiac Firebird
• Tempest
• LeMans
• Firebird

Similar engines

• Pontiac OHC 6 Sprint — 230 ci
• Pontiac Pontiac OHC-6 · 3.874" × 3.531" · 9:1 — 250 ci
• Pontiac 250 Ohc6 Sprint — 250 ci
• Pontiac Ponti 1967 230 215HP — 230 ci
• Pontiac GM 3800 V6 · 3.799" × 3.402" · 9.4:1 — 231 ci
• Pontiac GM 3800 V6 · 3.799" × 3.402" · 8.5:1 — 231 ci
• GMC 230 — 230 ci
• Jeep 6-230 — 230 ci

← All Pontiac OHC-6 engines