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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 ...
The Cadillac CTS is a luxury car, manufactured and marketed by General Motors from 2003 until 2019 across three generations.. Initially available as a 4-door sedan using the GM Sigma platform, GM offered the second generation CTS in 4-door sedan, 2-door coupe, and 5-door sport wagon, and the third generation as a sedan, using a stretched version of the GM Alpha platform.
The Northstar engine is a family of high-performance 90° V engines produced by General Motors between 1993 and 2011. Regarded as GM's most technically complex engine, the original double overhead cam, four valve per cylinder, aluminum block/aluminum head V8 design was developed by Oldsmobile R&D, [citation needed] but is most associated with Cadillac's Northstar series.
The 3.2 L; 193.8 cu in (3,175 cc) LA3 or Y32SE is a complete redesign of the L81 for the Cadillac CTS and Opel Omega B. [citation needed] It had fixed (non-variable) valve timing, and a variable length intake manifold. The engine has a 87.5 mm × 88 mm (3.44 in × 3.46 in) bore and stroke with a 10.0:1 compression ratio.
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
A Cadillac Sedan DeVille, one of the models offered with the V8-6-4 engine. For the 1981 model year only, Cadillac offered a feature on its V8 engine called the V8-6-4. On this engine, up to four cylinders could be deactivated while cruising to save fuel.
The Cadillac STS was assembled at GM's Lansing Grand River facility in Lansing, Michigan along with the smaller CTS sedan. Available engines were a 3.6 L High Feature LY7 V6 with 255 hp (190 kW) and 252 lb⋅ft (342 N⋅m) and the 4.6 L Northstar LH2 V8 which puts out 320 hp (240 kW) and 315 lb⋅ft (427 N⋅m) in the STS.
However, with the third-generation CTS growing larger to match the size of the 5-Series, Cadillac armed the ATS-V with the LF4 twin-turbo V6 engine, producing 464 horsepower (346 kW) and 445 pound-feet (603 N⋅m). The ATS-V is the first-ever V series Cadillac to be powered by a V6 rather than a V8.