GM LS3 Engine

Last crawled date: 1 year, 10 months ago

The LS3 was introduced as the Corvette's new base engine for the 2008 model year. It produces 430 bhp (321 kW; 436 PS) at 5900 rpm and 424 lb⋅ft (575 N⋅m) at 4600 rpm without the optional Corvette exhaust and is SAE certified. The block is an updated version of the LS2 casting featuring a larger bore of 103.25 mm (4.065 in) creating a displacement of 6,162 cc (6.2 L; 376.0 cu in). It also features higher flowing cylinder heads sourced from the L92, a more aggressive camshaft with 0.551 in (14 mm) lift, a 10.7:1 compression ratio, a revised valvetrain with 0.236 in (6 mm) offset intake rocker arms, a high-flow intake manifold and 47 lb (21 kg)/hr fuel injectors from the LS7 engine.