The Subaru BRZ / GR86 (FA24) is rated 228 hp (SAE · US market) at 7,000 rpm and weighs 2,815 lb (US curb, estimated, BRZ Premium manual (Limited 2,835; automatic 2,864–2,881 lb)), or 12.3 lb/hp. On enthusiast estimates its stock internals are taken to about ~400 hp, the fuel system to around ~290 hp, and its naturally aspirated setup is taken to about ~260 hp before forced induction. Below: the sourced spec sheet, the limit sheet carbuildcheck analyzes against, and the platform's community-documented weak points.
rotating assembly ceiling · fails first: pistons on lean mixtures under boost · 93 AKI · no named source: site planning estimate · site planning figure; no named FA24 limit source was fetched
Induction ceiling~260 hp
naturally aspirated ceiling (bolt-ons and cam) · fails first: NA ceiling: header, tune, intake · 93 AKI · no named source: site planning estimate · site planning figure ~260 hp
Fuel system~290 hp
stock fuel-system ceiling · fails first: stock pump and injectors on boost · 93 AKI · no named source: site planning estimate · site planning figure; no named source in this audit
Clutch (manual)~270 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
Transmission (automatic)~310 hp
gearbox / driveline rating · fails first: gearbox at torque · no named source: site planning estimate · site planning figure; no named source in this audit
Cooling (sustained)~320 hp
thermal ceiling for sustained load · fails first: oil temperature on track · 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
⚑Early cars had community-documented RTV-debris oil starvation failures on track; an aftermarket pickup/baffle and fresh oil habits are cheap insurance.
⚑Modest boost with a quality tune is the community's proven FA24 path; the platform rewards restraint more than peak numbers.
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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