The hottest new small-block now available in a box.
Starting with the '08 Corvette, the world was first introduced to GM's latest small-block V8 creation - the 6.2L LS3. A continuation of the industry leading V8 engines from GM, the LS3 kicks out 430 horsepower and 424 lb.-ft. of torque. (In the Corvette, those numbers go to 436 hp and 428 lb.-ft. of torque with optional dual mode exhaust system.)
The LS series of engines has broken new ground for efficiency and performance from a pushrod platform engine. The LS3 continues the engineering breakthroughs with revised cylinder heads featuring rectangle ports borrowed from the L92. The heads feature 63cc combustion chambers, 2.16" hollow-stem intake valves (reminiscent of the LS6), and 1.59" exhaust valves. The camshaft features an aggressive .551" of lift on the intake side with less overlap (than the LS2) for even greater airflow and power. Rocker arms with a 1.7:1 ratio sit on top of the heads. In the bottom end, the aluminum 6-bolts/main block features 4.06" bores and a 3.62" stroke. A nodular iron crankshaft, powdered-metal rods, and aluminum pistons (10.7:1 compression ratio) round out a rev-happy short block. Red line for the LS3 comes at 6600 rpm, and you will get there very quickly.
With a high-tech GM foundation, aluminum block, and high flowing rectangular-port heads, the LS3 is the new standard in the small-block world. The LS3 helps power the new Corvette to a top speed of 190 mph. What will it power you to?
LS3 6.2L Tech Specs:
Part Number: 19201992
Engine Type: LS Series Gen IV small-block V8
Displacement (cu in): 376 (6.2L)
Bore x stroke (in): 4.06 x 3.62 (103.25 x 92mm)
Block (P/N 12584727): Cast aluminum with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12597569): Nodular iron
Connecting rods (P/N 12617570): Powdered metal
Pistons (P/N 19165089): Hypereutectic aluminum
Camshaft type (P/N 12603844): Hydraulic roller
Camshaft lift (in): .551 intake/.522 exhaust
Camshaft duration (@ .050 in): 204° intake/211° exhaust
Cylinder heads (P/N 12598594): LS3 recatangle port; as cast with 68cc chambers
Valve size (in): 2.16 intake/1.59 exhaust
Compression ratio: 10.7:1
Rocker arms (P/N 12569167 int): Investment cast, roller trunnion
Rocker arms (P/N 10214664 exh): Investment cast, roller trunnion
Rock arm ratio: 1.7:1
Recommended fuel: 92 octane
Reluctor wheel (not used): 58X