12624262 6.2 Ltr - LS9
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As the foundation for the supercharged engine that powered the 2009-13 CorvetteZR1, our LS9 is a long block built for boost—delivered without the supercharger orfront-end accessory drive system, allowing the builder to finish the engine with thepower adder of his or her choice. It is rated for 12 lbs. of boost.The assembly includes a forged rotating assembly (including lightweight titaniumconnecting rods), rotocast aluminum cylinder heads with titanium intake valvesand stainless hollow exhaust valves, multiple engine sensors and six ignitioncoils. It also includes a dry-sump oil pan, which requires the builder to add anexternal oil tank.Whether you use a supercharger or turbo system, the LS9 long block is theassembled foundation developed for the boost you want to make. It made theC6 ZR1 a legend in its own time—and there’s no telling where its performancepotential will take your project!
INSTALLATION NOTES• Assembly does not include any electronics• Includes dry-sump oil pan and requires external oil tank (not included).Oil pan change required for wet-sump oiling• Includes 9-bolt crankshaft flange that may require adapter for use withsome transmissions• Induction system and front-end accessory drive system not included• Not intended for marine applications
TECH SPECSPart Number: 12624262Engine Type: LS-Series Gen-IV Small-Block V-8Displacement (cu. in.): 376 (6.2L)Bore x Stroke (in.): 4.065 x 3.622 (103.25 x 92 mm)Block: Cast-aluminum with six-bolt,cross-bolted main capsCrankshaft (P/N 12641693): Forged steel with nine-bolt flangeConnecting Rods (P/N 12624231): Forged titaniumPistons (P/N 19180414): Forged aluminumCamshaft Type (P/N 12638427): Hydraulic rollerValve Lift (in.): .562 intake / .558 exhaustCamshaft Duration (@.050 in.): 211° intake / 230° exhaustCylinder Heads (P/N 12621774): Aluminum L92-style ports; “ascast” with 68-cc chambersValve Size (in.): 2.160 titanium intake / 1.590;hollow, sodium-filled exhaustCompression Ratio: 9.1:1Rocker Arms (P/N 12696105 int): Investment-cast, roller trunnionRocker Arms (P/N 12681275 exh): Investment-cast, roller trunnionRocker Arm Ratio: 1.7:1Recommended Fuel: Premium pumpMaximum Recommended rpm: 6600Reluctor Wheel: 58XBalanced: Internal