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The Chevrolet 90° V6 family of V6 engines began in 1978 with the Chevrolet 200 cu in (3.3 L) as the base engine for the all new 1978 Chevrolet Malibu.The original engine family was phased out in early 2014, with its final use as the 4.3 L (262 cu in) V6 engine used in Chevrolet and GMC trucks and vans.
Vortec is a trademarked name for a line of gasoline engines for General Motors trucks. The name first appeared in an advertisement for the 1985 model year 4.3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber , creating a better air / fuel atomization. [ 1 ]
The LLV (also called Vortec 2900) is a 2.9 L; 178.3 cu in (2,921 cc) straight-4 DOHC engine produced between 2007 and 2012, with a 95.5 mm × 102 mm (3.76 in × 4.02 in) bore and a stroke. It replaced the LK5 and produced 185 hp (138 kW) at 5,600 rpm and 190 lb⋅ft (258 N⋅m) of torque at 2,800 rpm.
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in³ (1980-1983).
This was Chevrolet's second 4.3L power plant; four other Chevrolet engines displaced 4.3L: the Vortec 4300 (a V6 based on the Chevrolet 350 cu in (5.7 L), with two cylinders removed), the original 265 cu in (4.3 L) V8 in 1954, a bored version of the stovebolt-era 235 inline six displacing 261 cu in (4.3 L), and a derivative of the Generation II ...
The Iron Duke 4-cylinder and 2.8 L 60° V6 engines were discontinued, the 4.3 L Vortec V6 was enhanced, and a new 2.2 L 4-cylinder engine (which had been introduced in 1990 on various front-wheel-drive GM compact and mid-size platforms) became the engines of choice to power the second generation of S-10s.
The 4-cylinder engine was only offered in short-length, rear-wheel-drive cargo vans, as well as passenger vans for 1985 only; it was dropped after 1990. For 1985, the 4.3L V6 (RPO LB1) used a 4-barrel carburetor. For 1986, throttle body fuel injection (TBI) was used. For 1992 and later years, a central port injection was used.
Dubbed EcoTec3, the 4.3 L (260 cu in) is a Generation V small block V6 truck engine. It gets its displacement from bore and stroke of 99.6 mm × 92 mm (3.921 in × 3.622 in) with a compression ratio of 11.0 to 1. Firing order is 1-6-5-4-3-2. [82] This engine replaces the unrelated 4.3L V6 whose lineage dates back to 1978.
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