Chevy  LT 1 Engine Specs

Here in this article you will learn about the LT 1 Engine Specs , Performance,  Cylinder Heads, Cam Specs & More, Let’s discuss the ford LT 1 Engine Specs  , Valvetrain, performance, and Reviews.

This engine specification guide is for the fifth-generation LT1 General Motors engine, launched in 2014.

GM has three engines that are designated LT1: All-aluminum LT1 engines use Active Fuel Management and Variable Valve Timing.

Direct fuel injection technology is also used in the engines.

This allows fuel to be injected directly into the combustion chamber instead of pumped through the intake runners. The LT1 cannot use Flex Fuel (E85).

An LT1 6.2L crate engine is now available.

It’s also worth noting that specific Corvette models of the LT1 had a dry sump oiling mechanism.

This information is intended for a stock engine.

LT 1 Engine Specs

LT1 Block Specs

Displacement 6.2L / 376 c.i.d.
Bore Dia. 4.065 in.
Stroke 3.622 in.
Deck Height 9.240 in.
Bore Spacing 4.400 in.
Thrust Bearing Location #3 Main, 1/2 thrust
Main Cap Style 6-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 Centerline 4.914 in.
Oil Squirters 8
Casting Numbers 12619171, 19329617
Material 319-T7 Aluminum

LT1 Valvetrain Specs

Lifter Style Hydraulic Roller
Lifter Link Style Plastic Lifter Tray
Lifter Body Diameter 0.842 in.
Pushrod Dimensions 7.85 in. (long) x 0.342 (dia.)
Rocker Arm Mounting Style Pedestal
Rocker Arm Style Die-Cast, Roller Fulcrum
Rocker Ratio 1.8
Rocker Offset None
Valve Spring Style Beehive
Valve Spring Color Natural
Intake Valve Angle 12.5° / Splayed 2.61°
Exhaust Valve Angle 12.0° / Splayed 2.38°
Intake Valve Material Steel, Hollow Stem
Intake Valve Dia. 2.126 in.
Exhaust Valve Material Steel, Sodium Filled
Exhaust Valve Dia. 1.590 in.
Timing Chain Guide Style Spring-Loaded Tensioner

Engine Ratings

Compression Ratio 11.5: 1
Horsepower Rating 455 hp @ 6,000 rpm
Torque Rating 460 ft./lbs. @ 4,600 rpm

LT1 Cylinder Head Specs

Material 319-T7 Aluminum
Combustion Chamber Volume 59.02cc
Intake Port Shape Rectangle
Intake Runner Volume 297cc
Intake Manifold Bolt Pattern LT1 Specific
Exhaust Port Shape Flat Oval
Exhaust Runner Volume 107cc
Intake Valve Diameter 2.126 in.
Exhaust Valve Diameter 1.590 in.
Cylinder Head Bolt Style Torque to Yield (TTY)
Cylinder Head Bolt Size (10) M12 x 1.75, M8 corner bolts
Part Numbers 12678633, 12620544, 12620545
Casting Numbers 12620549

LT1 Cam Specs

Part Number 12629512
Duration @ .050 in. (int./exh.) 200°/207°
Valve Lift (int./exh.) 0.551 in./0.524 in.
Lobe Separation Angle 116.5°
Cam Gear Attachment 1-Bolt
Cam Gear Poles 4X
Active Fuel Management (AFM) Yes
Variable Valve Timing (VVT) Yes

LT1 Applications

VIN 8th Digit Year Make Model
7 2014-present Chevrolet Corvette Stingray
7 2017-present Chevrolet Corvette Grand Sport
7 2016-present Chevrolet Camaro SS

LT1 Rotating Assembly Specs

Piston Style Domed (with reliefs for the exhaust valve and direct injector)
Piston Volume 0.6cc (net)
Wrist Pin Dia. 0.9431 in. (full floating)
Connecting Rod Material Powdered Metal
Connecting Rod Style I-Beam
Connecting Rod Length 6.098 in.
Connecting Rod Housing Bore 2.225 in.
Connecting Rod Bolts M9 x 1 x 43
Connecting Rod Part Number 12654242
Crankshaft Material 1538MV 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 Wheel 58X
Harmonic Balancer Iron
Piston Material Hypereutectic Cast Aluminum Alloy

LT1 Throttle Body, Fuel Injectors, Oil Pan Specs & More

Throttle Body 87mm, 4-Bolt
Throttle Control Electronic (Drive-by-Wire)
Fuel Injector P/N 12656931
Fuel Injector Flow 123 lbs./hr. (2,205 max psi)
Flex Fuel Capable (E-85) No
Computer E92
Crankshaft Reluctor Ring 58x
Camshaft Sensor Location Timing Cover
Oil Capacity (Wet Sump) 6.5 qt.
Oil Capacity (Dry Sump) 9.75 qt.
Intake Manifold Car-Style
Throttle Body 87mm, 4-Bolt

Chevy  LT 1 Engine Specs Review Video

Chevy LT1 Engine Specs FAQ

What engine is in a LT1?

In 1992, General Motors introduced the LT1, a performance 350cu in (5.7 L) engine based on the Chevy small block V8. It was named to honor the first LT-1.

Is an LT1 a good engine?

All in all, the LT1 is an extremely reliable engine. The OptiSpark distributor issue is the only issue likely to occur with this model.

Head gaskets are generally safe, provided the engine doesn’t get overheated.

Is a LT1 a Corvette engine?

The LT1 was named after the initial LT-1 solid lifter, a high-pressure 350 cubic block found in the 1970s in the early Corvettes and Camaros.

Eventually, the version of 1990 would make its way into these identical vehicles.

How many LT1 engines are there?

three different engines
General Motors produced three distinct engines called LT1 from 1970 to19722LT-1. This is Chevrolet Generation I Small-Block.

1992-1997 LT1 – GM Generation II Small-Block. 2013-(current), LT1 – GM Generation V Small-Block.

Is a LT1 a big block?

The LT1 is one of the most technologically advanced engines on the planet.

It also represents the most significant redesign of the small block ever.

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