19332621 LT4 6.2 L 650 HP Supercharged Crate Engine with wet sump
As heart of the Corvette Z06, the supercharged LT4 6.2L SC is the most powerful engine ever offered in a regular production Chevrolet. It features a more-efficient, more-compact 1.7L Eaton R1740 TVS supercharger, which spins at up to 20,000 rpm. That’s enough to generate more than 9 pounds of boost and help produce 650 horsepower and 650 lb.-ft. of torque.
The LT4 is based on the same Gen V Small-Block architecture as the LT1 engine, with several unique features designed
to support its higher output and the greater cylinder pressures created by forced induction. They include Rotocast
A356T6 aluminum cylinder heads that are stronger and handle heat better than conventional castings, lightweight
titanium intake valves and stronger forged aluminum pistons.
TECH SPECS
Part Number: 19332621 (wet sump)
19332702 (dry sump)
Engine Type: Gen V Small-Block V-8
Displacement (cu in): 376 cu in (6.2L)
Bore x Stroke (in): 4.065 x 3.622 (103.25 x 92mm)
Block: Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft: Forged steel
Connecting Rods: Forged powdered-metal steel
Pistons: Forged aluminum
Camshaft Type: Hydraulic roller
Valve Lift (in): 0.492 intake / 0.551 exhaust
Camshaft Duration (@0.050 in): 189° intake / 223° exhaust
Cylinder Heads: A356T6 Rotocast aluminum; as cast with 65.5cc chambers
Valve Size (in): 2.130 intake / 1.590 exhaust
Compression ratio: 10:1
Rocker Arms (P/N 12619829):
Investment cast, roller bearing trunnion
Rocker Arm Ratio: 1.81:1
Recommended Fuel: Premium pump
Maximum Recommended RPM: 6,600
Reluctor Wheel: 58x
Balanced: Internal
INSTALLATION NOTES
• Assembly does not include electronics - use P/N 19331517 LT4
controller kit to operate engine
• Dry sump engine requires production or after-market oil lines
and oil tank (not included)
• Flywheel included
• Intended for pre-1976 street vehicles or any off-road vehicles
• Not intended for marine applications
• Crankshaft has 8-bolt flywheel mounting pattern
• Engine includes direct injection, VVT and Active FuelManagement
Engine Includes:
• Fully GM assembled long block
• Ignition Coils, Plug Wires and Spark Plugs
• Oil pump, pick-up and oil pan (dry sump or wet sump)
• Exhaust Manifolds
• Intake, Injectors and Throttle Body
• High Pressure Fuel Pump (installed under intake)
• 14” Auto Trans Flexplate (11.063 tc pattern, 8-bolt crank)
• Harmonic Balancer
• Front timing cover
• Aluminum Water Pump
• Oil Filter
• Warranty:General Motors limited 2 year / 50,000 mile parts & labor warranty
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These engines are a bit different than the LS.
-Engine mount pattern is different by 1 bolt on the top.
-The new C7 has electric steering. We have a serpentine setup available for $3095 but it will only work for wet sump engines at this time.
Factory setups:
Wet sump serpentine part number 19332590
Dry sump serpentine part number 19322614
Dry sump A/C add-on part number 19332591
-LT1/4's have an 8-bolt crankshaft pattern, which is the same pattern as the LSA. The clutch/flywheel kits for the LSA fit the LT1/4.
-The bell housing pattern is just about identical.. But the top bolt is in a different location. There is a special bell housing that GM offers for the 4L60-70E that will work, but you'll need to beef up one of those transmissions to last behind an LT4. The 4L85e works, except the top bolt cannot be utilized.
-The GM steel bell housing for T56's has the hole in the right spot, and accepts their clutch kit.
-There are TWO different oil pans - dry sump & wet sump. The wet sump pan is large just like LS3 Camaro pans, but the wet sump LT1 pan fits with better ground clearance. The LT1 pan can be modified on the front of the sump to clear crossmembers just like the Corvette LS3 and LS1 Camaro pans. The LT4 wet sump comes in the 2016 CTS-V.
Just a friendly reminder that we are your go-to source for Chevrolet Performance crate engines & parts. We've sold several of the LT4's, and can provide MOST of the necessary add-ons for your project.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
LT4 Supercharged Crate Engines Now Available
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