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GM 6.2 Liter Supercharged Small Block V8 LT4 Engine

The LT4 is a gasoline internal combustion engine produced by General Motors for use in ultra-high-performance vehicles. Part of GM’s 5th-generation Small Block engine family, the engine displaces 6.2 liters, has eight cylinders in a “V” layout, and features a purpose-built supercharger.

The engine originally debuted in the Corvette C7 Z06 before going on to power the third-generation, 2016-2019 Cadillac CTS-V as well as the sixth-gen Camaro ZL1, followed by the Cadillac CT5-V Blackwing and Cadillac Escalade-V.

6.2L LT4 Engine Vitals
Displacement: 6.2L / 376 cu. in.
Aspiration: Forced Induction (Supercharger)
Vehicles: Cadillac CTS-V, Chevrolet C7 Corvette Z06, Camaro ZL1, Cadillac CT5-V Blackwing, Cadillac Escalade-V
Introduced: 2014 model year
Discontinued: -
Predecessor: LS9 / Gen 4 Small Block
Successor: -
Assembly: Tonawanda, New York (Z06, CTS-V, ZL1); Performance Build Center, Bowling Green Kentucky (CT5-V Blackwing)

Overview

The LT4 is the most powerful production engine ever offered in a General Motors vehicle. The LT4 engine builds on the design strengths of the previous LS9 supercharged engine used in the sixth-generation Corvette ZR1 and leverages the technologies introduced on the seventh-generation Corvette Stingray, including direct injection, cylinder deactivation and continuously variable valve timing, to take Corvette performance to an all-new plateau.

The LT4 is based on the same Gen 5 small block foundation as the 6.2L LT1 naturally-aspirated engine, incorporating several unique features designed to support its higher output and the greater cylinder pressures created by forced induction.

Engine highlights include:

  • Next generation Eaton supercharger
  • Dual-brick air-to-liquid intercooler
  • Rotocast A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional aluminum heads
  • Lightweight titanium intake valves
  • Forged powder metal steel connecting rods which are highly machined to an optimized geometry for increased strength while eliminating unnecessary reciprocating mass
  • Forged aluminum pistons with unique, stronger structure to ensure strength under high cylinder pressures
  • Stainless steel exhaust manifolds for structure at higher temperatures
  • Aluminum balancer for reduced mass
  • Standard dry-sump oiling system with a dual-pressure-control oil pump
  • Dual-pressure-control and variable-displacement vane pump with increased flow capacity
  • Dual-equal cam phasing
  • PCV integrated rocker covers
  • Direct Injection, which allows for a relatively high 10.0:1 compression ratio
    • A high compression for a forced-induction engine, which enhances the LT4’s performance and efficiency
  • High-pressure fuel pump
  • Active fuel management/Cylinder deactivation

Specifications

GM 6.2 Liter Supercharged V8 Small Block LT4 Engine Specs
Displacement: 6162cc (376 ci)
Engine Orientation: Longitudinal
Compression ratio: 10.0:1
Valve configuration: Overhead valves
Valves per cylinder: 2
Assembly sites
For CTS-V, Camaro ZL1 Tonawanda, New York
For Corvette Z06: Bowling Green, Kentucky
Valve lifters: Hydraulic roller
Firing order: 1 – 8 – 7 – 2 – 6 – 5 – 4 – 3
Bore x stroke: 103.25 x 92mm
Fuel system: DI
Fuel Type: Premium required
Maximum Engine Speed: 6600 RPM
Drive Belt Rib Count: 8
Materials
Block: Cast aluminum
Cylinder head: Cast aluminum
Intake manifold: Cast Aluminum Supercharger
Exhaust manifold: Cast Stainless (Corvette) or Fabricated Stainless (CTS-V)
Main bearing caps: Cast Nodular
Crankshaft: Forged steel
Camshaft: Billet Steel
Connecting rods: Forged Powder Metal
Emissions Controls
Catalytic converter
Three-way catalyst
Positive crankcase ventilation
Additional Features
1.74 L/rev Supercharger
Integrated dual coolant-to-air-intercoolers
Active Fuel Management
Variable Valve Timing (VVT)
Electronic throttle control
Extended life coolant
Extended life spark plugs
Oil Life Monitor System
Dexos 5W30
Dual-pressure control and variable displacement oil pump
Dry sump (Corvette only)
58x crank timing

Vehicle Applications

GM 6.2 Liter Supercharged LT4 Engine Vehicle Applications
Year Make Model Transmission (RPO) Power (hp / kW @ RPM) Torque (lb-ft / Nm @ RPM)
2015 – 2019 Chevrolet C7 Corvette Z06 GM 8-Speed HydraMatic Auto 8L90 (M5U) 650 / 485 @ 6400 650 / 881 @ 3600
2015 – 2019 Chevrolet C7 Corvette Z06 Tremec 7-Speed Manual TR6070 (MEK) 650 / 485 @ 6400 650 / 881 @ 3600
2016 – 2019 Cadillac CTS-V Sedan GM 8-Speed HydraMatic Auto 8L90 (M5U) 640 / 477 @ 6400 630 / 855 @ 3600
2017 – present Chevrolet Camaro ZL1 GM 10-Speed HydraMatic Auto 10L90 (MGL) 650 / 485 @ 6400 650 / 881 @ 3600
2017 – present Chevrolet Camaro ZL1 Tremec 6-Speed Manual TR6060 (MJK) 650 / 485 @ 6400 650 / 881 @ 3600
2022 – present Cadillac CT5-V Blackwing GM 10-Speed HydraMatic Auto 668 / 498 @ 6500 659 / 893 @ 3600
2022 – present Cadillac CT5-V Blackwing Tremec 6-speed Manual 668 / 498 @ 6500 659 / 893 @ 3600
2023 – present Cadillac Escalade-V GM 10-Speed HydraMatic Auto 10L90 682 / 509 @ 6000 653 / 885 @ 4400

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