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 Ratio | 11.5: 1 |
| Horsepower Rating | 455 hp @ 6,000 rpm |
| Torque Rating | 460 ft./lbs. @ 4,600 rpm |
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 Engine Block Specs
| LT1 Block Specs | |
|---|---|
| Casting Numbers | 12619171, 19329617 |
| Material | 319-T7 Aluminum |
| 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 |
LT1 Rotating Assembly
| LT1 Rotating Assembly Specs | |
|---|---|
| Piston Material | Hypereutectic Cast Aluminum Alloy |
| 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 |
LT1 Cylinder Heads
| LT1 Cylinder Head Specs | |
|---|---|
| Part Numbers | 12678633, 12620544, 12620545 |
| Casting Numbers | 12620549 |
| 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 |
LT1 Camshafts
| 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 Valvetrain
| 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 |
Other Key LT1 Specs
| LT1 Throttle Body, Fuel Injectors, Oil Pan Specs & More | |
|---|---|
| Intake Manifold | Car-Style |
| 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. |
[…] 195 horsepower and 195 ft.-lbs. of torque more than its naturally aspirated cousin, the LT1. To accomplish this, the LT4 […]
[…] are currently just five LT engines, including the LT-based EcoTec3 truck engines: LT1, LT4, L83, L8B, and […]
[…] engines use a longer intake runner than its cousin, the LT1. This helped the L86 produce peak torque 500 rpm sooner than the car version of the 6.2L engine. […]
The Compression Ratio is 11.5:1, not “11:5”.
The static compression is 11.5.1. Dynamic compression is 9.1:1
Dry-sump oil capacity in the Camaro application is 10.0 quarts
Fantastic, couldn’t ask for more. Keep it up. Thanks
[…] 195 horsepower and 195 ft.-lbs. of torque more than its naturally aspirated cousin, the LT1. To accomplish this, the LT4 […]
Please put forged pistons in all LT-1 engines
Is it difficult to swap a lt1 from a 92 corvette to a gen 5 lt1?
Hello,
I am trying to buy a 4l80e transmission and I trying to figure out is there a certain bolt pattern I need. I have a 2017 Gen V LT1 engine that I want to put it with. Do anyone know what I should be looking for?
They have adaptors to install the 4l80 . If you are doing a trans. Plant I urge you to go with the 8 speed. Don’t have to worry about it. I went the 8 speed and swap was easier than I thought
The throttle body is 87mm, but how big is the intake manifold opening ?
Does puting a 92mm throttle body on it increase horsepower and performance ?
I’m looking for a picture or diagram of all the sensor locations on a Gen V , LT1 engine.
I’m ready to start connecting the wiring harness and it would be a lot easier to have a diagram showing where each sensor is located when I’m ready to start.
Thanks