The Nissan Z (RZ34) / Q50 Red Sport 400 (VR30DDTT) is rated 400 hp (SAE net (secondary listing) · US market) at 6,400 rpm and weighs 3,486 lb (US curb, Z Sport manual, MY2023 (secondary)), or 8.7 lb/hp. On enthusiast estimates its stock internals are taken to about ~600 hp, the fuel system to around ~500 hp, and the stock turbo(s) are taken to about ~520 hp. Below: the sourced spec sheet, the limit sheet carbuildcheck analyzes against, and the platform's community-documented weak points.
Units
01 Spec sheet sourced
EngineVR30DDTT · 2,997 cc · V6
Engine codeVR30DDTT
Bore × strokenot sourced in this audit
Compressionnot sourced in this audit
Inductiontwin turbo
Fuel systemdirect
Rated power400 hp · SAE net (secondary listing) · US market @ 6,400 rpm
Torque350 lb-ft @ 1,600 rpm
Redlinenot sourced in this audit
Stock boostnot sourced in this audit
Transmission6MT · 9AT
DrivetrainRWD
Curb weight3,486 lb · US curb, Z Sport manual, MY2023 (secondary) · 8.7 lb/hp
GenerationRZ34 (2023+); the Infiniti Q50/Q60 Red Sport 400 (2017–2024) shares the 400 hp rating in a heavier sedan; Z NISMO 420 hp · 2023–
Verified againstcars.com, 2023 Nissan Z specs (secondary, read 2026-09-06) · The rated power and the mass each rest on one document.
02 What stock parts support enthusiast estimates
Engine internals~600 hp
rotating assembly ceiling · fails first: heat soak pulls timing long before parts break · 93 AKI · no named source: site planning estimate · site planning figure ~600 hp; no named VR30 tuner source was fetched
Induction ceiling~520 hp
stock turbo / supercharger ceiling · fails first: stock turbos out of efficiency · 93 AKI · no named source: site planning estimate · site planning figure ~520 hp
Fuel system~500 hp
stock fuel-system ceiling · fails first: HPFP · 93 AKI · no named source: site planning estimate · site planning figure; no named source in this audit
Clutch (manual)~420 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)~500 hp
gearbox / driveline rating · fails first: 9AT at torque · no named source: site planning estimate · site planning figure; no named source in this audit
Cooling (sustained)~480 hp
thermal ceiling for sustained load · fails first: water-to-air charge coolers heat-soak · 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
⚑Heat exchangers come first on the VR30 (community consensus): it pulls timing from heat soak long before parts break.
⚑Young aftermarket. Flex-fuel kits and proven tunes only; the platform punishes experiments.
04 The typical path
Stage 1 tune → intake → downpipe → intercooler → Stage 2 tune. Fueling before E85; the clutch on a manual, a gearbox calibration on a automatic before sticky tires.
Analyze your Z (RZ34) / Q50 Red Sport 400 (VR30DDTT) build
Tap your mods, set a goal. Score, weak link, roadmap. Free, no login.
buying used? check the history first — the link gets you 20% off ↗Partner link
Partner link: may earn carbuildcheck a commission at no extra cost to you. The stock limits, weak points and upgrade path on this page are documented independently and never influenced.
Partner link: may earn carbuildcheck a commission at no extra cost to you. Fitment is per-platform, so check bolt pattern, center bore, offset and tire size against your own car before ordering anything, and note this retailer ships within the US. The stock limits, weak points and upgrade path on this page are documented independently.
↗Partner link