Overview
Chevrolet Performance LS 376/525 LS3 Long Block Crate Engines
Chevrolet Performance has released its latest factory-engineered LS high-performance engine: the 376/525 LS3 long block. It blends the racing-derived ASA camshaft with the LS3 6.2L production engine to create the most powerful production-based crate engine in Chevrolet Performance’s portfolio, delivering 525 hp at 6,200 rpm and 486 lbs.-ft. torque at 5,200 rpm. (For installation in older vehicles, the engine controller kit part number 19354332 is calibrated specifically for this new engine.)
Using the LS3 production engine—the same used in Corvettes and Camaros—as the foundation for the LS 376/525 helped keep the retail price lower; while the ASA camshaft is a proven, power-building component that’s been successful in the high-RPM world of Circle Track racing. The ASA camshaft is a hydraulic roller with .525-inch lift on both the intake and exhaust sides, along with 226 degrees duration on the intake side and 236 degrees on the exhaust side. Coupled with a tight, 110-degree lobe separation angle, it helps the engine deliver excellent throttle response and breath exceptionally well at high RPM. The cam also gives the LS 376/525 the most aggressive personality among Chevrolet Performance’s growing lineup of production-based high-performance crate engines, which also includes the LS 376/480 and the carbureted LS 376/515.
Front-end accessories must be obtained separately, along with the engine controller kit. Chevrolet Performance offers several accessory drive kits to suit a variety of applications; and some installations for older vehicles will require the oil pan changed.
Engine specifications:
* Power: 525 hp at 6,200 rpm, 486 lbs.-ft. of torque at 5,200 rpm
* Displacement: 376 C.I.D., 6.2L
* Bore x Stroke: 4.060 in. x 3.620 in.
* Compression Ratio: 10.7:1
* Recommended Fuel: 92 Octane
* Block: Cast Aluminum with 6-bolt cross bolted main caps
* Crankshaft: Nodular Iron
* Connecting Rods: Powdered Metal Steel
* Pistons: Hypereutectic Aluminum
* Camshaft: Steel Hydraulic Roller Tappet
* Cam Lift: .525 in. Intake / .525 in. Exhaust
* Cam Duration at .050 in.: 226 deg. Intake / 236 deg. Exhaust
* Lobe Separation: 110 Degree
* Cylinder Heads: Aluminum L92 style ports
* Combustion Chamber: 68cc
* Valves: 2.165 in. Intake/ 1.590 in. Exhaust
* Rocker Arms: Cast Roller Trunnion, 1.7:1 Ratio
* Balance: Internal
* Reluctor: 58X
* Maximum GM Recommended RPM: 6,600
* GM Recommended Torque Converter Stall 3000-3400
Engine Includes:
— Fully GM assembled long block
— Oil pump, pick-up and Camaro oil pan (12628771)
— Corvette harmonic balancer
— Front timing cover with cam sensor
— Oil filter
— Passenger side RH oil dipstick and tube (not included)
(Note: Does not include oil dipstick tube, oil dipstick, or steam crossover tube.)
