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Honda B18C5 Type R
Inline4 · N/A
Honda · B-Series DOHC VTEC
Honda B18C5 Type R
The hand-finished 1.8-liter Integra Type R engine built for high-rpm naturally aspirated performance.
109.8
Cubic inches
The B18C5 used a higher-flow head, aggressive cams, higher compression and extensive factory blueprinting to become one of Honda's most celebrated naturally aspirated fours.
Displacement
109.8 ci
Bore
3.189"
Stroke
3.433"
Years
1997–2001 U.S. Type R era
Key Takeaway
The B18C5 takes the 1.8-liter B-series layout and sharpens it for Type R duty with a high-flow VTEC cylinder head, aggressive cam profiles, careful factory assembly, and high-rpm tuning. The 3.189-inch bore and 3.433-inch stroke are shared with other B18C variants, but the Type R calibration and hardware push the package much further.
Technical Specifications
- Horsepower
- 195 hp in U.S. Integra Type R specification
- Torque
- 130 lb-ft @ 7,500 rpm in U.S. Integra Type R specification
- Architecture
- DOHC inline four
- Block
- Aluminum with iron liners
- Cylinder heads
- Aluminum
- Valvetrain
- DOHC, 4 valves per cylinder with VTEC
- Aspiration
- Naturally aspirated
- Fuel delivery
- Electronic multi-point fuel injection
The B18C5 takes the 1.8-liter B-series layout and sharpens it for Type R duty with a high-flow VTEC cylinder head, aggressive cam profiles, careful factory assembly, and high-rpm tuning. The 3.189-inch bore and 3.433-inch stroke are shared with other B18C variants, but the Type R calibration and hardware push the package much further.
Internal Specifications
Variant-specific values are labeled. Engine families that span multiple years or RPOs can have different heads, cams, induction and rotating parts, so the exact code/year always takes priority.
Notable Applications
Strengths
- Exceptional cylinder-head flow
- High-rpm durability
- Factory performance blueprinting
Weaknesses / Watch-outs
- Rare and expensive
- Theft/abuse history affects many surviving engines
- High-compression tuning requires quality fuel
Common Upgrades
- Header/exhaust
- Camshaft optimization
- High-compression naturally aspirated builds
Racing History & Legacy
The B18C5 is one of Honda’s most celebrated naturally aspirated engines and remains a reference point for factory-built high-specific-output fours. Its rarity and Type R connection have made surviving engines increasingly valuable.
References & Image Credit
Engineering Notes Worth Knowing
3.189 x 3.433-inch bore and stroke; 109.8 cu in / 1.8 L.
DOHC 16-valve VTEC with aluminum block and head.
U.S. Integra Type R output was 195 hp and 130 lb-ft.
Factory application was the Acura Integra Type R.
History · context · related reading
The Story Behind Honda B18C5 Type R
The B18C5 was Honda’s proof that production-line attention to detail could make a mass-produced four-cylinder feel almost hand-built. Its freer-flowing head, aggressive valvetrain, and high-rpm calibration gave the Integra Type R its defining engine character.
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