2009 Pontiac Sedan G8 GXP V8 PictureThe affection of the G8 GXP is the 6.2L LS3 small-block V-8, currently rated at 402 application (300 kW)* and 402 lb.-ft. of torque (546 Nm)* awaiting final SAE certification. This agent is the newest affiliate of GM’s small-block V-8 family. It appearance a revised, larger-bore butt block, high-flow, L92-style butt heads; larger-diameter pistons; different camshaft and camshaft timing; revised valvetrain with account assimilation rocker arms; high-flow assimilation manifold; and high-flow ammunition injectors.
The LS3 agent has an aluminum butt block with cast-in-place adamant butt liners. Larger bores advice actualize a 376-cubic-inch displacement. The block casting additionally appearance revisions and machining in the bulkheads to enhance its backbone and advance bay-to-bay breathing. New pistons were advised for high-rpm performance.
New, high-flow butt active aid agent breath and are based on the ample anchorage and valve architecture begin on the LS7 agent and added GM L76 engines. The larger-capacity, straighter assimilation port-design optimizes assimilation breeze to the agitation chamber, an aftereffect aggrandized by ample valves, barometer 2.16 inches (55.0 mm) on the assimilation ancillary and 1.59 inches (40.4 mm) on the bankrupt side. Pending final testing, the G8 GXP is accepted to bear 0-to-60 mph achievement of about 4.7 seconds, and a quarter-mile time of 13.0 abnormal at 108 mph.
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