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#Linksonic5 engine 2 series#
It would instead be the series of iron-block, aluminum-head LS engines produced under the Vortec brand name for Chevrolet, GMC, Cadillac, and Hummer trucks that would greatly expand the family. It's not a common engine, however, given that it was only available for two years in the Cadillac CTS-V, and four years in the Z06 model Corvette. On the high performance side, the LS6 would refine the LS1's details with a more aggressive camshaft profile, improved intake, higher compression, stronger block, and sodium-filled valves. GM would waste no time in expanding its Gen III architecture to include a variety of applications, displacements, and design differences. Despite offering 346 cubic inches as opposed to the previous standard of 350 (with a 3.89-inch bore and a 3.62-inch stroke), the LS1 continued to be marketed as a 5.7-liter motor. Next up was scrapping a traditional distributor for an electronically-controlled coil-on-plug design, using a composite intake manifold, and introducing cathedral ports on the also-aluminum engine heads.
#Linksonic5 engine 2 full#
One of the biggest changes was the move from an iron block to a full aluminum casting, which dropped the weight of the engine considerably. That being said, there were several key differences introduced by the LS1 as compared to GM V8s that had preceded it. Many things about the LS1 helped maintain its lineage to previous small blocks, including the same general bellhousing pattern (which has had a major impact on the LS being perceived as a 'plug-and-play' replacement motor for older vehicles), its two-valves per cylinder, and its pushrod design. Officially, General Motors refers to this series of motors as the 'Generation III small block,' which identifies it as a successor to the brand's previous pushrod V8s, each of which was based on the original small block design that debuted in 1954. The LS story starts in 1997 when the LS1 engine first appeared in the Chevrolet Corvette (later migrating to the Chevrolet Camaro and Pontiac Firebird). With that in mind, we put together this beginner's guide to the LS family that explains the lineage of each generation of this venerable V8. Within those particular divisions are an entire universe of motors that, while sharing many commonalities, also offer a fair number of differences that can affect what applications they're best suited for, what prices you'll pay for both parts and the engines themselves, and how easy they'll be to find.ĭeciding which LS is the best fit for your particular needs is easier when you've got some background on the basics. Getting started in the LS world means understanding that there are by now two distinct generations of this particular engine family, spanning nearly 20 years of production. Prized for its compact form factor, its power-per-dollar potential, and its sheer ubiquity, the LS family of eight-cylinder motors has become almost the default answer to the question 'what should I swap into my hot rod / restomod / pickup truck / off-road rig / race car / dragster.' In the world of affordable V8 engines the LS reigns supreme. The L92 is used primarily as a high-performance engine for the Cadillac Escalade and GMC Yukon Denali.A Beginner's Guide To Buying An LS V8 Engine: Understanding The Family History Manufactured with iron and aluminum cylinder blocks.* 6.0L - Used primarily in 3/4-ton and 1-ton trucks, the 6.0L (364 cu in) uses an iron block (LY6) or aluminum block (L76) and aluminum heads, with provisions for Active Fuel Management some equipped with variable valve timing.* 6.2L - Commonly referred to by its L92 engine code, the 6.2L (376 cu in) engine uses an aluminum block and heads, and incorporates advanced technology including variable valve timing. Later versions equipped for Active Fuel Management.
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Here's a quick rundown of the previous and current-production LS truck engines:* 4.8L - The smallest-displacement LS engine (293 cu in) it uses an iron block with 3.78-inch bores and aluminum heads.* 5.3L - The most common LS truck engine (327 cu in), it uses the same iron block with 3.78-inch bores as the 4.8L, but with a longer stroke, (3.62-inch)crank. Interestingly, a 5.7L Vortec "LS" engine has never been offered. In the beginning, they were generally distinguished by iron cylinder blocks and were offered in smaller displacements than car engines.
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Although performance car engines have typically carried "LS" designations, truck engines built on this platform have been dubbed Vortec.