Chevrolet Performance’s new LS427/570 builds on the track-bred performance of the LS7 engine and enhances it in two important ways: More power and easier installation. A new, higher-lift camshaft helps it produce 570 horsepower and 540 lb.-ft. of torque—increases of 65 hp and 70 lb.-ft. over the production-based LS7 crate engine.
Additionally, a new wet-sump oiling system facilitates easier and less costly installation, because the supporting components for the production-based LS7’s dry-sump system are not required.
Product highlights:
• Based on the production LS7 crate engine
• Unique high-lift hydraulic roller camshaft with.591-in. intake/ .590-in. exhaust lift
• Unique high-rate valve springs
• F-body wet-sump oil pan and specific wet-sump oil pump
• Low-profile LS7 EFI intake manifold with fuel rails, injectors and throttle body installed
• CNC-ported cylinder heads featuring 2.2-inch titanium intake valves
• Comes assembled with 14-inch Camaro Z/28 168-tooth manual transmission flywheel
• Use with LS427 Engine Controller P/N 19420000 (sold separately)
• Not intended for marine applications
TECH SPECS
Part Number:Â 19420191
Engine Type:Â LS-Series Small-Block V-8
Displacement (cu in):Â 427 (7.0L)
Bore x Stroke (in):Â 4.125 x 4.000 (101.6 x 92 mm)
Block (P/N 12602689):Â Cast aluminum block with 6-bolt, cross-bolted main caps
Crankshaft (P/N 12611649):Â Forged steel
Connecting Rods (P/N 12661677):Â Forged titanium
Pistons:Â Hypereutectic aluminum
Camshaft Type (P/N 19419859):Â Hydraulic roller
Valve Lift (in):Â .591 intake/.590 exhaust
Camshaft Duration (@.050 in): 227º intake / 242º exhaust
Camshaft Lobe Separation Angle: 116º
Cylinder Heads:Â CNC-ported LS7-style ports with 70cc combustion chambers
Valve Size (in):Â 2.200 titanium intake, 1.610 sodium filled exhaust
Compression Ratio:Â 11.0:1
Rocker Arms:Â Investment-cast, roller bearing trunnion
Rocker Arm Ratio:Â 1.8:1 (offset intake)
Recommended Fuel:Â Premium pump
Maximum Recommended RPM:Â 7,000 rpm
Balanced:Â Internal
NOTE:Â LS427/570 engine will include F-body wet-sump oil pan.Â
Chevrolet Performance recommends 15W-50 MOBIL 1 engine oil for the LS427/570 Crate Engine