⭕ LS7 427cid 7.0L ENGINE 505hp / 475tq



GM LS7 Crate Engine. When this engine first came out in 2006 it was called the Largest, Most Powerful Small Block Ever Built CNC Ported Cylinder Heads, Titanium Connecting Rods and Intake Valves, 505 hp and 475 torque right out of the box. Here are some pictures and the full description is below.



LS7 at a Glance

Engine type cam-in-block 90-degree V-8
Block configuration cast aluminum with pressed-in cylinder sleeves and 6-bolt, forged steel main bearing caps
Bore x Stroke (mm / in) 104.8 x 101.6 /4.125 x 4.00
Displacement (L / cu in) 7.0 / 427
Forged steel crankshaft with 101.6-mm (4-inch) stroke
Connecting rods forged titanium
Pistons cast aluminum
Compression ratio 11.0:1
Cylinder heads CNC-ported aluminum; 70-cc chamber volume
Valve size, intake (mm / in) 56 / 2.20 (titanium)
Valve size, exhaust (mm / in) 41 / 1.61 (sodium-filled)
Camshaft hydraulic roller; 15 mm (.591 in) lift (intake and exhaust)
Rocker arms 1.8:1; offset (intake only)
Air intake composite manifold with 90 mm single-bore throttle body
Fuel Premium required. 91 octane minimum
Horsepower 505 (373 kW) @ 6200 rpm
Torque (lb-ft) 475 (644 Nm) @ 4800 rpm
Engine redline (rpm) 7000
Unique engine block with larger 104.8-mm (4.125-inch) bores and pressed-in cylinder liners
Dry Sump Oiling System
505 horsepower / 475 lb.-ft. torque
Racing technology transfer takes production engine performance to new heights
Racing-derived CNC-ported aluminum cylinder heads with titanium intake valves and sodium-filled exhaust valves
Each engine assembled by hand by a single, specially-trained builder
Hydroformed exhaust headers with unique quad flow collector flanges.