LT Engines

LT1 6.2L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More

 
2014 "LT-1" 6.2L V-8 VVT DI (LT1)

2014 “LT1” 6.2L V-8 VVT DI (LT1) for Chevrolet Corvette (Image/Chevrolet)

This is an engine specification guide for General Motors’ fifth-generation LT1 engine that launched in 2014.

GM has built three engines designated as the LT1:

  • 1970-72 – Gen. I, 5.7L, small block (technically, the first-gen. was written as “LT-1”)
  • 1991-97 – Gen. II, 5.7L, small block
  • 2014-present – Gen. V, 6.2L, small block

The new LT1 is the Gen. 5, 6.2L, small block engine used in Chevrolet performance cars. It was introduced in the 2014 C7 Chevy Corvette.

LT1 engines are all-aluminum and use Active Fuel Management (AFM) and Variable Valve Timing (VVT).

The engines also use direct fuel injection technology, which shoots fuel directly into the combustion chamber instead of the intake runner. However, the LT1 is not Flex Fuel capable (E85).

An LT1 6.2L crate engine is now available.

It is also worth noting that some Corvette versions of the LT1 came with a dry sump oiling system.

The information listed here is for a stock engine.

(Summit Racing’s Brian Nutter and Paul Spurlock contributed to this article.)

Chevy LT1 Engine Specs

LT1 Performance Specifications

Engine Ratings
Compression Ratio11:5
Horsepower Rating455 hp @ 6,000 rpm
Torque Rating460 ft./lbs. @ 4,600 rpm

LT1 Applications

VIN 8th DigitYearMakeModel
72014-presentChevroletCorvette Stingray
72017-presentChevroletCorvette Grand Sport
72016-presentChevroletCamaro SS

LT1 Engine Block Specs

LT1 Block Specs
Casting Numbers12619171, 19329617
Material319-T7 Aluminum
Displacement6.2L / 376 c.i.d.
Bore Dia. 4.065 in.
Stroke3.622 in.
Deck Height9.240 in.
Bore Spacing4.400 in.
Thrust Bearing Location#3 Main, 1/2 thrust
Main Cap Style6-Bolt
Main Housing Bore Dia.2.751 in.
Cam Housing Bore Dia.Bore 1/5 = 2.346 in. Bore 2/4 = 2.326 in. Bore 3 = 2.307 in.
Cam-to-Crank Centerline4.914 in.
Oil Squirters8

LT1 Rotating Assembly

LT1 Rotating Assembly Specs
Piston MaterialHypereutectic Cast Aluminum Alloy
Piston StyleDomed (with reliefs for the exhaust valve and direct injector)
Piston Volume0.6cc (net)
Wrist Pin Dia.0.9431 in. (full floating)
Connecting Rod MaterialPowdered Metal
Connecting Rod StyleI-Beam
Connecting Rod Length6.098 in.
Connecting Rod Housing Bore2.225 in.
Connecting Rod BoltsM9 x 1 x 43
Connecting Rod Part Number12654242
Crankshaft Material1538MV Forged Steel
Crankshaft Part Number (Wet Sump)12623492
Crankshaft Part Number (Dry Sump)12629940
Crankshaft Main Journal Dia.2.559 in.
Crankshaft Rod Journal Dia.2.100 in.
Reluctor Wheel58X
Harmonic BalancerIron

LT1 Cylinder Heads

LT1 Cylinder Head Specs
Part Numbers12678633, 12620544, 12620545
Casting Numbers12620549
Material319-T7 Aluminum
Combustion Chamber Volume59.02cc
Intake Port ShapeRectangle
Intake Runner Volume297cc
Intake Manifold Bolt PatternLT1 Specific
Exhaust Port ShapeFlat Oval
Exhaust Runner Volume107cc
Intake Valve Diameter2.126 in.
Exhaust Valve Diameter1.590 in.
Cylinder Head Bolt StyleTorque to Yield (TTY)
Cylinder Head Bolt Size(10) M12 x 1.75, M8 corner bolts

LT1 Camshafts

LT1 Cam Specs
Part Number12629512
Duration @ .050 in. (int./exh.)200°/207°
Valve Lift (int./exh.)0.551 in./0.524 in.
Lobe Separation Angle116.5°
Cam Gear Attachment1-Bolt
Cam Gear Poles4X
Active Fuel Management (AFM)Yes
Variable Valve Timing (VVT)Yes

LT1 Valvetrain

LT1 Valvetrain Specs
Lifter StyleHydraulic Roller
Lifter Link StylePlastic Lifter Tray
Lifter Body Diameter0.842 in.
Pushrod Dimensions7.85 in. (long) x 0.342 (dia.)
Rocker Arm Mounting StylePedestal
Rocker Arm StyleDie-Cast, Roller Fulcrum
Rocker Ratio1.8
Rocker OffsetNone
Valve Spring StyleBeehive
Valve Spring ColorNatural
Intake Valve Angle12.5° / Splayed 2.61°
Exhaust Valve Angle12.0° / Splayed 2.38°
Intake Valve MaterialSteel, Hollow Stem
Intake Valve Dia.2.126 in.
Exhaust Valve MaterialSteel, Sodium Filled
Exhaust Valve Dia.1.590 in.
Timing Chain Guide StyleSpring-Loaded Tensioner

Other Key LT1 Specs

LT1 Throttle Body, Fuel Injectors, Oil Pan Specs & More
Intake ManifoldCar-Style
Throttle Body87mm, 4-Bolt
Throttle ControlElectronic (Drive-by-Wire)
Fuel Injector P/N12656931
Fuel Injector Flow123 lbs./hr. (2,205 max psi)
Flex Fuel Capable (E-85)No
ComputerE92
Crankshaft Reluctor Ring58x
Camshaft Sensor LocationTiming Cover
Oil Capacity (Wet Sump)
6.5 qt.
Oil Capacity (Dry Sump)9.75 qt.
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  1. Pingback: LT4 6.2L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders

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