Chevrolet Small Block Gen IV LS7 427 (2006)
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Home » Racing Engines » Chevrolet Small Block Gen IV LS7 427

Specifications

Chevrolet Small Block Gen IV LS7 427ci (7.0 lt), 4 stroke
Introduced in 2006
7008cc
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Dimensions

Cylinders arrangement: V8 (90o)
Strokes: 4
Bore x Stroke: 104.775 x 101.6 mm
Capacity: 7008 cc
Compression ratio: 11.0:1

Construction materials

A319 T5 (production) or A357-T6 aluminum alloy block with 235mm deck height and 111.7mm bore spacing, A356 T6 aluminium head
nodular iron crankshaft with 5 main bearings

Cylinder-head

crossflow design
camshaft in block chain driven with pushrod and overhead titanium valves (OHV), 2 valves/cyl - 16 valves total
56mm diameter titanium intake valves, 41mm diameter sodium-filled exhaust valves, 12o angle between inlet/exhaust valve axis and vertical, inlet/exhaust valves on the same longitudinal plane

Aspiration

Νatural with multipoint electronic Fuel Injection
2 x 28.8mm inlet restrictors

Ignition

ECU
firing order

Cooling and lubrication

water cooled
dry sump

Torque values

Models used and Output

Year Model Induction Compression ratio Power Torque
2006 Chevrolet Corvette C6 Z06 GT2 MPFI 11.0:1 470 hp at 6300 rpm 470 lb·ft (640 N·m) at 4800 rpm
2006 Mosler MT900R Z06 GT2 MPFI 11.0:1 470 hp at 6300 rpm 470 lb·ft (640 N·m) at 4800 rpm
MC-0810-LS7.R-2.jpg Source
2006-Chevrolet-Corvette-Z06-LS7-Cutaway-1280x960.jpg Source
vemp_0704_01_z%2Bcorvette_cylinder_block_comparison%2Bc5r_and_ls7_blocks.jpg Source
Gen III (left) and Gen IV (right) engine
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