B18C · 1.8 NA VTEC I4. What the stock hardware is estimated to support, where it breaks first, and the honest path to more.
The Honda Integra Type R (DC2, B18C) is rated 197 hp (Japanese catalog 147 kW / 200 PS (net); US B18C5 195 hp SAE · JP market) at 8,000 rpm and weighs 2,381 lb (Honda vehicle weight, DC2 Type R (1,070 kg in the lightweight spec; DB8 4-door 1,120 kg)), or 12.1 lb/hp. On enthusiast estimates its stock internals are taken to about ~400 hp, the fuel system to around ~250 hp, and its naturally aspirated setup is taken to about ~240 hp before forced induction. Below: the sourced spec sheet, the limit sheet carbuildcheck analyzes against, and the platform's community-documented weak points.
Units
01 Spec sheet sourced
EngineB18C · 1,797 cc · I4
Engine codeB18C
Bore × stroke81 × 87.2 mm
Compression11.1:1
Inductionnaturally aspirated
Fuel systemport
Rated power197 hp · Japanese catalog 147 kW / 200 PS (net); US B18C5 195 hp SAE · JP market @ 8,000 rpm
Torque137 lb-ft @ 6,200 rpm
Redlinenot sourced in this audit
Transmission5MT
DrivetrainFWD
Curb weight2,381 lb · Honda vehicle weight, DC2 Type R (1,070 kg in the lightweight spec; DB8 4-door 1,120 kg) · 12.1 lb/hp
GenerationDC2 (Japan 200 PS); the US Integra Type R (B18C5) is rated 195 hp and the GS-R (B18C1) 170 hp · 1995–2001 (Japan); US 1997–2001
rotating assembly ceiling · fails first: stock sleeves and rods under boost · 93 AKI · no named source: site planning estimate · site planning figure ~400 hp; no named B-series tuner source was fetched
Induction ceiling~240 hp
naturally aspirated ceiling (bolt-ons and cam) · fails first: NA ceiling: header, intake, cams · 93 AKI · no named source: site planning estimate · site planning figure ~240 hp
Fuel system~250 hp
stock fuel-system ceiling · fails first: stock injectors on boost · 93 AKI · no named source: site planning estimate · site planning figure; no named source in this audit
Clutch (manual)~230 hp
stock clutch torque capacity · fails first: stock clutch slip · no named source: site planning estimate · site planning figure; no named source in this audit
Cooling (sustained)~300 hp
thermal ceiling for sustained load · fails first: radiator capacity · no named source: site planning estimate · site planning figure; no named source in this audit
Tuning limitsenthusiast estimates, crank hp on the stated fuel; sources: none named yet; method: the analyzer plans on the lower bound of each range
⚑The original budget-boost classic (community consensus): stock-internals B-series live happily around 300 hp with a proper tune and honest boost control.
⚑It is a 90s chassis: bushings, hubs, axles and rust checks before power. The chassis refresh is the real stage 1.
04 The typical path
Intake → headers → tune → cams or forced induction. NA gains are modest on most platforms; the big unlock is boost, and boost starts at the fuel system.
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