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LT4 Supercharged 6.2L
V8 "GEN V"
Vehicle Applications
- 2016+ Cadillac CTS-V
- 2014+ Corvette Z06
- 2017+ Camaro ZL1
Product
Highlights
- Gen V Aluminum Cylinder Block
- 1.7L Eaton R1740 TVS Supercharger
- Direct Fuel Injection
- Variable Valve TIming (VVT)
- Active Fuel Management (AFM)
- Advanced
Electronic Throttle Control
- 58X Ignition Systems
LT4 Engine Specs (VIN "6")
The information listed here is for a stock engine.
| Performance Specifications | |
| Compression Ratio | 10:1 |
| Horsepower Rating | 640-650 hp @ 6,400 rpm |
| Torque Rating | 630-650 ft.-lbs. @ 3,600 rpm |
| Application Information | |||
| VIN 8th Digit | Year | Make | Model |
| 6 | 2016-present | Cadillac | CTS-V |
| 2014-present | Chevrolet | Corvette Z06 | |
| 2017-present | Chevrolet | Camaro ZL1 | |
| Engine Block Specifications | |
| Part Number | 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 |
| Rotating Assembly Specifications | |
| Piston Material | Forged Aluminum Alloy |
| Piston Style | Flat Top (with reliefs for the exhaust valve and direct injector) |
| Piston Volume | 11cc (net) |
| Piston Ring Material | PVD coated top ring, Chrome second ring, Nitride Stainless oil ring. |
| Wrist Pin Dia. | 0.9431 in. (full floating) |
| Wrist Pin Material | Steel (with DLC coating) |
| 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 | 12669751 |
| Crankshaft Material | 1538MV Forged Steel (with fillets) |
| Crankshaft Part Number | 12674746 (wet sump), 12674743 (dry sump) |
| Crankshaft Main Journal Dia. | 2.559 in. |
| Crankshaft Rod Journal Dia. | 2.100 in. |
| Crankshaft Rear Flange | 8-bolt |
| Reluctor Wheel | 58X |
| Harmonic Balancer | Anodized aluminum hub (with iron ring) |
| Cylinder Head Specifications | |
| Part Numbers | 12646959 |
| Casting Numbers | 12646956 |
| Material | Rotocast A356-T6 Aluminum |
| Combustion Chamber Volume | 65.47cc |
| Intake Port Shape | Rectangle |
| Intake Runner Volume | - |
| Intake Manifold Bolt Pattern | LT4 Specific |
| Exhaust Port Shape | Flat Oval |
| Exhaust Runner Volume | - |
| Cylinder Head Bolt Style | Torque to Yield (TTY) |
| Cylinder Head Bolt Size | (10) M12 x 1.75, M8 Corner bolts |
| Camshaft Specifications | ||
| Part Number | 12642245 | |
| Duration @ .050 in. (int./exh.) | 189°/223° | |
| Valve Lift (int./exh.) | 0.492 in./0.551 in. | |
| Lobe Separation | 120° | |
| Cam Gear Attachment | 1-bolt | |
| Cam Gear Poles | 4X | |
| Active Fuel Management (AFM) | Yes ** | |
| Variable Valve Timing (VVT) | Yes | |
** All versions used AFM,
EXCEPT ZL1 Camaros with a manual
transmission.
| Valvetrain Specifications | |
| Lifter Style | Hydraulic Roller |
| Lifter Link Style | Plastic Lifter Tray |
| Lifter Body Dia. | 0.842 in. |
| Pushrod Dimension | 7.85 in. (long) x 0.342 in. (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 | Titanium, Solid 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 Specifications | |
| Supercharger | Eaton 1.7L (R1740) |
| Rotor Dimensions | 7.88 in. (long) x 3.94 in. (dia.) - 160° Helix |
| Supercharger Drive | 3.1:1 drive ratio, 20,150 rpm max, 9.2-9.7 lbs. boost |
| Intercooler | 23% smaller than LS9, but 10% better heat rejection |
| Throttle Body | 87mm, 4-bolt |
| Throttle Control | Electronic (Drive-by-Wire) |
| Fuel Injector P/N | 12684130 |
| Fuel Injector Flow | 141 lbs./hr. (2,940 max psi) |
| Flex Fuel Capable (E-85) | No |
| Computer | E92 |
| Crankshaft Reluctor Ring | 58X |
| Camshaft Sensor Location | Timing Cover |
| Oil Capacity (wet sump) | 10.0 qt. |
| Oil Capacity (dry sump) | 9.75 qt. |
Note: Some Corvette versions of the LT1 came with a dry sump oiling system.