Ls3 engine specs

The guy who thought that hp out of a Chevrolet small block was not good enough; thus, hotrodding was born unto this world. Since that day there have been many engines that gearheads have revered for their power, prowess, and ease of modification. GM has engineered another beast, the LS3. Those numbers are pretty impressive from the crate engine, but the LS3 offers durability and extreme power potential, creating a gearheads dream.

Before we get into the numbers-heavy specs, here are a few light facts to keep in mind as you are planning your build. First off, the LS3 motor is totally aluminum: from stem to stern. That is to say from block to head. The use of aluminum allows the engine to cool much faster than if it had an iron block and aluminum heads. It also offers a weight reduction over an iron block. It is generally acknowledged that LS engines respond better when they run cooler.

Many gearheads have noticed that keeping the engine around degrees during normal operation coaxes more power out of an LS3. That is why the first mod that many do is to install a degree thermostat.

The LS3 family is very similar to the LS1. Most of the differences between the two engines are internal, with the more noteworthy being bore, stroke, heads, and cam setup.

LS3 ENGINE TEARDOWN!

All of these changes push the LS3 to 6. With a few changes to bore, stroke, etc and the addition of a supercharger, the LS3 happily pumps out bhp. Before we start quoting specs, better tell you where they come from. Stolen directly from the Chevrolet website. Shameless, yes.

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Accurate, though. As an added bonus, replacement part numbers are listed on the site as well. Output: hp at rpm and lb-ft of torque at rpm. Displacement cu. Given in inches Camshaft Duration at. Given in inches Compression Ratio: Modifying any engine type takes precision and skill to do correctly. We already listed the thermostat change to keep the engine cooler.

On top of that, here are two mods for the LS3 engine that will take some skill, but will add more than hp to your crate LS3. First up is changing the cam timing. The crate LS3 engine has a mild timing of 0. Fortunately for hotrod enthusiasts, the L92 cylinder heads have enormous flow potential, so why not install a high-performance cam.Article may contain affiliate links. As an Amazon Associate I earn from qualifying purchases. The LS3 did provide a considerable increase in volume, at 6.

This increase in displacement along with other key features such as the high flow heads, high flow fuel injectors, and increased compression ration resulted in an impressive 30 horsepower over the LS2 in its Corvette offerings.

As mentioned, the North American introduction of the LS3 was in the Corvette in with the engine remaining available as the base model Corvette offering untila rather long stint in comparison to some of the previous Corvette offerings.

The same year the LS3 was made available to Vauxhall owners as well as in several Holden models. In the LS3 was added as an option for the Pontiac G8 for one year, and then in it became the engine of choice for the Camaro SS and is still available in this application. This engine was and still is very popular for its power and strength. As mentioned, the LS3 is a very powerful engine, especially for a naturally aspirated engine at the time of its introduction. From the initial offering in the Corvette, this engine could be purchased in a package capable of outputting horsepower at RPM and lb-ft at RPM.

This engine is 6. The stroke is common with the LS2 at 3.

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The increase in bore size further enhances the compatibility with heads from various heads from other LS series engines. The LS3 engine is constructed of aluminum alloy block and heads. One special note about the LS3 block is that it was designed considerably stronger that many of the other LS engines with thicker walls. Due to its strength, the LS3 block was later used in the LS9 for the ZR1 engine, a very high output supercharged engine.

Common with many of the other LS engines, the pistons are constructed of hypereutectic aluminum alloy. The hypereutectic construction reduces the thermal expansion of the piston and allows for a tighter fit in design between the cylinder and the piston.

The valve architecture uses 2 valves, 1 intake and 1 exhaust per cylinder. This 6. This engine was also well known for having a very strong block, so much so that its block was used later in the LS9 application.

These features combined with many other performance enhancing characteristics are a major reason why this engine is still used today in the Camaro SS as well as for purchase in crate engines. LS3 Engine Specs Article may contain affiliate links.The LS3 is a Gen. The engine specs and information listed here is for a stock LS3 engine. These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide.

Summit Racing has created a series of comprehensive guides for each engine in the LS family, so engine builders and tuners can have a handy reference for their projects.

Pingback: L99 6. I have a Camaro SS L99 6. But if they are both using the exact same cam I should be fine, correct? Pingback: L9H 6. Your email address will not be published. Your Website. Save my name, email, and website in this browser for the next time I comment.

This site uses Akismet to reduce spam. Learn how your comment data is processed. It had a dry sump oiling system and a modified crankshaft. Bore Dia. Stroke 3. Deck Height 9. Bore Spacing 4. Cam Housing Bore Dia.

Connecting Rod Housing Bore 2. Crankshaft Rod Journal 2. Reluctor Wheel 58x 58x. Exhaust Valve Diameter 1. Pushrod Length 7. Author: OnAllCylinders Staff. Leave a Reply Cancel Your email address will not be published.The LS1 displaced 5.

Inthe Gen IV branch of the LS family was born, differing from the Gen III with cast-in provisions for fuel-saving cylinder deactivation, larger displacements and revised camshaft sensing.

GM has continued to refer its modern V-8 engine family as Gen III and Gen IV, but to the enthusiasts who quickly grasped the tremendous performance potential of the engines, every engine based on the platform has been nicknamed "LSX. On the truck side, iron-block engines have included 4. Car engines include 5. Gen III vs. The most distinguishing differences between Gen III and Gen IV cylinder blocks are larger bores on some enginesdifferent camshaft position sensor locations - indicated by a move to the front timing cover area on Gen IV blocks vs the top-rear position on Gen III blocks - and, on most Gen IV blocks, cast-in provisions for GM's Active Fuel Management cylinder deactivation system in the lifter valley.

Cylinder heads, crankshafts, intake manifolds and more can be mixed and matched - but the devil is in the details. Not every head matches every intake manifold and not every crankshaft works with every engine combination. The LS1 and LS6 share a 5. The heads, intake manifolds and camshaft also are unique LS6 parts. LS2 Inthe LS2 6. It is the standard engine in the Pontiac G8 GT. Its larger displacement brought greater power. The LS3 block not only has larger bores than the LS2, but a strengthened casting to support more powerful 6.

The L99 version is equipped with GM's fuel-saving Active Fuel Management cylinder deactivation system and is standard on Camaro SS models equipped with an automatic transmission. The LS4 has an aluminum block and unique, low-profile front-end accessory system, including a "flattened" water pump, to accommodate the transverse mounting position within the Impala and Grand Prix.

It is rated at horsepower and lb-ft of torque. LS7 A legend in its own time. The LS7 is the standard engine in the Corvette Z06 and its 7. Competition-proven heads and lightweight components, such as titanium rods and intake valves, make the LS7 a street-tuned racing engine, with horsepower. It is rated at an astonishing horsepower. The LS9 uses the strengthened 6. Like the LS7, it uses a dry-sump oiling system. It is the ultimate production LS engine. It is built with several differences, when compared to the LS9, including hypereutectic pistons vs.

The LSA also has a different charge-cooler design on top of the supercharger. Horsepower is rated at in the super-quick Caddy.

In the beginning, they were generally distinguished by iron cylinder blocks and were offered in smaller displacements than car engines. Interestingly, a 5. Later versions equipped for Active Fuel Management. Manufactured with iron and aluminum cylinder blocks. Non-production cylinder blocks C5R: Developed for the factory-backed Corvette racing program, the C5R cylinder block has been manufactured in comparatively small quantities since They are manufactured with a unique aluminum alloy for greater strength and undergo a variety of specialized machining and inspection processes, including "hipping" to increase strength and X-raying that ensures against unacceptable porosity.

A Siamese bore design with 4. The C5R uses billet steel main caps with premium, fasteners. Racing-quality head studs are also included. All LS series heads will work with the C5R block, but maximum performance depends on maximum airflow. LSX Bowtie Block standard and tall-deck : Introduced inthe LSX Bowtie Block is a durable and affordable cast iron casting that was designed to support extreme high-performance combinations, including provisions for six-bolts-per-cylinder head fastening.

General Motors LS-based small-block engine

It has a Siamese bore design with 3.The LS based small-block engine is the primary V-8 used in General Motors ' line of rear-wheel-drive cars and trucks. Introduced in Januaryit is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small-block V-8 that preceded it as the basis for GM small-block V-8s.

The basic LS variations use cast iron blocks, while performance editions are all aluminum with cast iron cylinder liners. Variants of the LT version of the GM small-block have been used since. Most of the credit for this engine family must go to Ed Koerner, GM's Powertrain vice president of engineering operations at the time. The performance improvements in the LS-family V-8s over the previous classic small-block V-8 family are several.

The lower section of the block incorporates deep side skirts, along with 6-bolt cross-bolted main bearing caps. This fully boxes the crankshaft, creating a very strong and rigid structure that has been hot-rodded by enthusiasts to over 1,HP. Although it is the same compact physical size as the classic small-block V-8, this block can accept a 4-inch stroke as an option in its stock form, due to the cam location being elevated slightly, compared to previous block designs.

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Also, the cam bearing journals are larger, to allow for a higher cam-lift profile than was previously possible. The stock aluminum heads can provide a high amount of air-flow, which previously could only be found in aftermarket race-performance heads.

The aluminum heads also incorporate steam vents to prevent gas pockets from building up in critical areas, and this is vital in allowing the coolant to manage heat build-up for high-performance applications. Such design features allow for a higher compression ratio with no fear of detonation. The thermostat has been located at a low position, which eliminates the possibility of a gas pocket preventing the thermostat from properly sensing the heat of the coolant.

Previous generations incorporated a coolant passage through the intake manifold to warm the incoming fuel-air mixture in very cold climates. However, modern fuel-injection techniques eliminate fuel atomization concerns under all conditions, so the LS family uses a dry intake manifold. This removes a common coolant leakage point and also allows the incoming air to remain as cool as possible for better power production.

ls3 engine specs

The architecture of the LS series makes for an extremely strong engine block with the aluminum engines being nearly as strong as the iron generation I and II engines. The LS engine also used coil-near-plug style ignition to replace the distributor setup of all previous small-block based engines.

ls3 engine specs

The cylinder firing order was changed to so that the LS series now corresponds to the firing pattern of other modern V-8 engines for example the Ford Modular V The first of the Generation IIIs, the LS1 was the progenitor of the new architecture design that would transform the entire V-8 line and influence the last of the Big Blocks. The Generation III 5. The extra horsepower was claimed to come from the intake ram-air effect available in the SS and WS6 models.With every subsequent reiteration, the LS small-block has become more powerful, efficient, and robust in its design.

ls3 engine specs

As the new power plant for the standard Corvettethe LS3 provided consumers with exactly what they had been craving, unsurpassed performance. During this period, GM had vested itself in the development of various efficiency-related engine campaigns, such as that of Active Fuel Management. GM also sought to build a performance engine that was capable of ultra-efficient combustion, which would thereby drastically reduce emissions output, without making any concessions in the realm of horsepower and torque.

GM earmarked a period of no more than two years to design, test, and tune the engine that would eventually carry the LS3 moniker. Also included was the addition of a new high-flow intake manifold and less restrictive cylinder heads, that featured rectangular intake ports. Cumulatively, each of these attributes would provide the LS3 with the level of efficiency toward which GM strived. Upon its release, the LS3 proved to be one of the most advanced performance engines ever produced by General Motors.

As such, a great deal of the technology that found its way into the newly designed LS3 had already been validated on the track, and in prior performance trials. The infamous small-block also utilized intake valves that were 9-percent larger than those found in the LS2, and 0. This composite intake utilized an acoustic shell to minimize ambient engine noise. A dual-mode exhaust package was also offered for C6 Corvettes powered by the LS3.

This system utilized vacuum-actuated outlet valves that reduced engine noise under periods of low-load. Under acceleration, these same valves would open, optimizing performance, and leading to a 6-horsepower increase in output. The LS3 was also the benefactor of additional technological advancements, which aided in throttle response and combustion efficiency.

The inclusion of Electronic Throttle Control ETC in all LS3 era C6 Corvettes eliminated any necessity for throttle cable use and provided more precise metering of throttle plate actuation. All things considered, the 6. Aside from its use in all base Corvette convertibles and coupes between the years of andthe LS3 also served as the powerplant for several other General Motors offerings.

From tothe LS3 could be found under the hood of the Camaro SS, in both its coupe and convertible forms. Additionally, the LS3 served as the powerplant of choice for the Chevy SS between the years of and Today, the LS3 is still offered by GM on a crate engine basis.

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ls3 engine specs

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Please whitelist our site in your adblocker, refresh the page, and enjoy! The 6. Between andthe LS3 was used in high-performance vehicles, such as the Camaro and Corvette, among others.

Follow our coverage of GM LS3 engine news. Catharines, Ontario, Canada. Intake flow was improved over previous engines by straightening out and optimizing the flow path from the intake manifold into the cylinder heads, while the exhaust ports are also designed for greater flow. Its deep-skirt design helps maximize strength and minimize vibration. A structural oil pan further stiffens the powertrain. Within the LS3 block is a durable rotating assembly that includes a steel crankshaft and connecting rods, as well as high-strength, aluminum-alloy pistons.

The flat-top pistons are also lightweight, a characteristic that enhances high-rpm performance by enabling the engine to rev quicker. They support great airflow at higher rpm for a broader horsepower band, along with strong, low-rpm torque. The intake ports that feed the combustion chambers, as well as the D-shaped exhaust ports, are designed for excellent high-rpm airflow.

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The composite manifold is manufactured with a lost core process to improve runner-to-runner variation and to reduce flow losses.

Dry Sump-Style Oiling System with Manual Transmission : Corvette models equipped with a manual transmission feature a dry sump oiling system which promotes exceptional performance of the lubrication system during extended high-rpm use under high cornering loads.

A sensor at the pedal measures pedal angle and sends a signal to the engine control module ECMwhich in turn directs an electric motor to open the throttle at the appropriate rate and angle.

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The ETC system can deliver outstanding throttle response and greater reliability than a mechanical connection. This allows the engine control module to adjust ignition timing with greater precision, which optimizes performance and economy.

Chevrolet LS3 Engine: Specifications, Configurations, & More

Engine starting is also more consistent in all operating conditions. Type: 6. GM Authority Newsletter Subscribe for free to receive our daily newsletter in your inbox.

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