JDM RWD /// platform file
Toyota GR Supra 3.0 build guide
B58 · 3.0 turbo I6. What the stock hardware reliably supports, where it breaks first, and the fastest safe path to more.
The Toyota GR Supra 3.0 makes 382 hp stock at roughly 3,400 lb (8.9 lb/hp). Its stock internals are good for about 650 hp, the fuel system for around 520 hp, and the stock turbo(s) flow about 500 hp. Below is the limit sheet carbuildcheck analyzes against, plus the platform's documented weak points.
01 Factory card
Stock power382 hp
Curb weight3,400 lb · 8.9 lb/hp
LayoutRWD
InductionTurbocharged
02 What stock parts support
Engine internals~650 hp
Fuel system~520 hp
Induction ceiling~500 hp
Clutch (manual)~420 hp
Transmission (auto/DCT)~700 hp
Cooling (sustained)~500 hp
Community-documented crank-hp planning figures, conservative by design. How these are used in the score →
03 Where it breaks first
The B58 HPFP is the wall around ~500 hp — bigger high-pressure pump or port injection before chasing more.
Plastic factory charge pipe pops under raised boost. Cheap aluminium fix — do it with the first tune.
04 The typical path
Stage 1 tune → intake → downpipe → intercooler → Stage 2 tune. Fueling before E85, driveline before sticky tires.
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