GM High Feature engine

GM High Feature V6
GM High Feature V6
	Alloytec LPG V6 engine in a 2006-2008 Holden VE Commodore
Overview
Manufacturer	General Motors
Also called	Alloytec V6
Production	2004–present
Layout
Configuration	60° V6
Displacement	2,792 cc (2.8 L; 170.4 cu in); 2,994 cc (3.0 L; 182.7 cu in); 3,195 cc (3.2 L; 195.0 cu in); 3,564 cc (3.6 L; 217.5 cu in); 3,649 cc (3.6 L; 222.7 cu in);
Cylinder bore	86 mm (3.39 in); 89 mm (3.5 in); 94 mm (3.7 in); 95 mm (3.74 in);
Piston stroke	74.8 mm (2.94 in); 80.3 mm (3.16 in); 85.6 mm (3.37 in); 85.8 mm (3.38 in);
Cylinder block material	Aluminum
Cylinder head material	Aluminum
Valvetrain	DOHC 4 valves × cyl. with VVT
Compression ratio	9.5:1, 10.0:1, 10.2:1, 10.3:1, 11.3:1, 11.5:1, 11.7:1, 12.2:1
RPM range
Max. engine speed	6500–7200
Combustion
Turbocharger	Twin-turbo (in some models) Single-turbo (in the 2.8L LP9 and LAU)
Fuel system	Sequential multi-port fuel injection; Direct injection
Fuel type	Gasoline, E85, LPG
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	201–464 hp (150–346 kW; 204–470 PS)
Torque output	182–445 lb⋅ft (247–603 N⋅m)
Emissions
Emissions target standard	Euro 6
Chronology
Predecessor	Buick V6 engine; 54° V6; GM High Value engine; LX5 (Shortstar);

The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern DOHC V6 engines produced by General Motors. The series was introduced in 2004 with the Cadillac CTS and the Holden Commodore (VZ).

It is a 60° 24-valve design with aluminum block and heads and sequential multi-port fuel injection. Most versions feature continuously variable cam phasing on both intake and exhaust valves and electronic throttle control. Other features include piston oil-jet capability, forged and fillet rolled crankshaft, sinter forged connecting rods, a variable-length intake manifold, twin knock control sensors and coil-on-plug ignition. It was developed by the same international team responsible for the Ecotec, including the Opel engineers responsible for the 54° V6, with involvement with design and development engineering from Ricardo plc.

GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."

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