LS3 + Hot Cam = Loads of Fun
The hot new small-block V8 in the GM lineup is the hyper-aggressive LS3. It offers a high-revving 376-cid combination that represents generations of small-block V8 development and engineering. Not only is the LS3 an amazing engine in its stock configuration, but with those high-flowing rectangular port cylinder heads, the LS3 is loaded with potential. To tap into this, the engineers at GM Performance Parts offers you the LS376/480 - an LS3 with an upgraded camshaft that ups power by a whopping 50 horsepower!
The LS376/480 comes with the same great features as the LS3 crate engine. The bottom end includes a 6-bolt aluminum block, nodular crank, high performance rods, and 10.7:1 pistons. The heads are high-flowing rectangular-port L92 units that have been upgraded with high-revving hollow-stem valves. The same EFI intake manifold feeds the hungry engine, while 1.7:1 roller rockers work with the upgraded camshaft.
The GM Performance Parts engineers picked the LS Hot Cam (P/N 88958733) to take the LS3 to the next level. This cam specs out with .525" intake and exhaust valve lift. Duration (@ .050") is 219° intake and 228° exhaust, which allows for a dramatic increase in power. The engine will idle and cruise just like an LS3, but the power increase is there whenever you need it.
LS376/440 Tech Specs:
Part Number: 19171224
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 88958733): Hydraulic roller
Camshaft lift (in): .525 intake/.525 exhaust
Camshaft duration (@ .050 in): 219° intake/228° 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