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, lightweighttitanium intake valves and stronger forged aluminum pistons. TECH SPECSPart Number:19417413 (wet sump)19416595 (dry sump)Engine Type: Gen V Small-Block V-8Displacement (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 capsCrankshaft: Forged steelConnecting Rods: Forged powdered-metal steelPistons: Forged aluminumCamshaft Type: Hydraulic rollerValve Lift (in): 0.492 intake / 0.551 exhaustCamshaft Duration (@0.050 in): 189° intake / 223° exhaustCylinder Heads: A356T6 Rotocast aluminum; as cast with 65.5cc chambersValve Size (in): 2.130 intake / 1.590 exhaustCompression ratio: 10:1Rocker Arms (P/N 12619829): Investment cast, roller bearing trunnionRocker Arm Ratio: 1.81:1Recommended Fuel: Premium pumpMaximum Recommended RPM: 6,600Reluctor Wheel: 58xBalanced: Internal INSTALLATION NOTES• Assembly does not include electronics – use P/N 19331517 LT4controller kit to operate engine• Includes engine oil cooler• Intended for pre-1976 street vehicles or any off-road vehicles• Not intended for marine applications• Crankshaft has 8-bolt flywheel mounting pattern (Same as LT1 and LSA)• Engine includes direct injection, VVT and Active Fuel Management
