NEW LS ENGINE - LS3 430HP AND 425TQ
430 HP LS3 6.2L The Hottest New Small-Block Now Available In A Box
· 430 horse
· 376 cubes
· 24-month GMPP warranty
Starting with the '08 Corvette, the world was first introduced to GM's latest small block V8 creation – the 6.2-liter LS3. A continuation of the industry leading V8 engines from GM Powertrain, 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 the optional dual mode exhaust system.)
It's a brute of a small block with 376 ready cubes at your beckon call.
The LS series of engines from GM Powertrain have 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 vaunted LS7. The heads feature 63 cc combustion chambers, 2.16-inch intake valves, and 1.59-inch exhaust valves.
The camshaft features an aggressive .551-inches 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-inch bores and 3.62-inch 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:
|Block Part Number:||12623967|
|Block Type:||Cast aluminum with 6-bolt main caps|
|Bore X Stroke (in):||4.065 x 3.622 (103.25 x 92mm)|
|Camshaft duration (@.050 in):||204 degree intake / 211 degree exhaust|
|Connecting rods (P/N 12617570):||Powdered metal|
|Crankshaft (P/N 12597569):||Nodular Iron|
|Cylinder Heads (P/N 12598594):||LS3 rectangle port: as cast with 68cc chambers|
|Displacement (cu in):||376 cu in (6.2L)|
|Engine type:||LS Series Gen IV small-block V-8|
|Maximum recommended rpm:||6600|
|Piston Part Number||19165089|
|Piston Type:||Hypereutectic aluminum|
|Recommended fuel:||92 octane|
|Rocker arm ratio:||1.7:1|
|Rocker arms exhaust Part Number:||10214664|
|Rocker arms exhaust Type:||Investment cast, roller trunnion|
|Rocker arms intake Part Number:||12569167|
|Rocker arms intake Type:||investment cast, roller trunnion|
|Valve Lift (in):||.551 intake / .552 exhaust|
|Valve size (in):||2.16 intake / 1.59 exhaust|