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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.