Category: Ls2 engine

Ls2 engine

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.

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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.

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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.

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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.Of these, few have been as iconic, or well-received, as the LS platform. Through its many renditions and technological advances, the LS series of engines have been touted far and wide as offering the ultimate in raw performance potential. Of the memorable engines featured within the LS series, one particular offering stands out for its versatility and raw ease of adaptability, over all others. Its role within the Corvette line had remained unchanged for eight years, with only subtle upgrades and revisions taking place during its tenure.

GM was also poised to release the all-new C6, and as such, felt it only fitting to offer consumers something new and original under the hood. At the same time, design and development within the LS program had turned toward an increasing interest in fuel efficiency, making further technological advancement necessary within this realm to achieve success.

GM touted the LS2 as featuring a newly developed engine block. The LS2 even came fitted with LS6 era cylinder heads. This level of compatibility has made the LS2 quite popular among engine builders and performance modders alike. The LS2 also featured an increase in cylinder bore dimensions from 3. This initial Gen IV small-block was capable of producing horsepower at 6, RPMand churning out an impressive lb. The LS2 also made use of a smaller camshaft than that used in conjunction with the LS6.

In the realm of overall performance, the LS2 displayed a greater amount of torque throughout the entirety of its power-band, than that of the LS6. The LS2 also featured an increased compression ratio of The LS2 also featured newly adapted exhaust manifolds, which were designed for weight reduction, and increased flow rates.

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The Active Fuel Management Technology made available within the Gen IV small-block design relied upon a set of specialty collapsable lifters, a Lifter Oil Manifold Assembly, and function-specific engine controller for intelligent function. When at cruising speeds, the ECM signaled for the deactivation of four cylinders. Upon deactivation, lifters within the dead cylinders were allowed to compress, making rotational camshaft function possible, without valve actuation on affected cylinders.

Though the LS2 only spent a few years in the sun, the storied engine was featured in several factory applications. The following list provides insight into which GM models carried the LS2 under the hood. The early Gen IV engine was only used in limited factory applications for a period of 5 years. However, the LS2 did find its way into several specialized applications during its tenure.

This Nascar specific LS2 was capable of mustering hp, and lb. Even today, some fifteen years after its introduction, the LS2 remains in high demand by consumers across the globe. The LS2 also ushered in a new era, paving the way for future development within the Gen IV LS engine line, from which Chevrolet continued to build upon in the years that followed.

C8 Corvette Overview. Corvettes For Sale. Submit News. Share Tweet. Corvette Engines. Corvette Engines Research. See all results.The LS family is a series of engines that are actually really similar to each other. The main difference between the engines in the LS family is the displacement, intake, camshaft, and various small details. The LS2 and the LS3 have a lot in common. But, the most obvious difference between the two is the displacement. The LS2 has 6. The LS3, on the other hand, has 6.

Luckily GM was actually really good at developing cylinder heads when they designed the LS engine. Throughout the years Chevrolet continued to perfect the LS heads. The LS2 heads were a slight step up from the LS1 heads. I am unable to find definitive flow numbers for both heads. These gains are due to changes in the intake runner length, size, and shape. Small things like shape can have a large effect on how air flows into the engine.

Just like the LS1 vs LS2 debate, the later engine has a slightly better intake manifold. This is the case from the LS2 vs LS3 debate. Chevrolet increased the intake manifold flow by straightening out the intake runner and optimizing the flow path from the intake manifold to the cylinder heads.

ls2 engine

This all adds up to a slightly better intake manifold. We briefly covered the difference in displacement at the beginning on this article. But, the has the same exact amount of stroke.

ls2 engine

Their bottom end is actually near identical, but the Chevy gave the LS3 an extra 12 cubic inches of displacement. Chevrolet upped the displacement of the LS3 by giving it a slightly larger bore. The LS2 has a bore of As I mentioned before, this gives the LS3 an extra 12 cubic inches.

This helped up the horsepower from to The increased bore also helps make the LS3 much happier to revs. It revs up much quicker than the LS2 and generally responds quicker to throttle inputs.

The increased bore also means slightly higher RPM potential.The LS2 is noteworthy within the LS engine family in that it appeared in both cars and trucks as did the L They also had different VIN codes.

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The engine is a Gen IV, 6. This article will focus on the car version. At first glance, the LS2 car engine looks similar to other engines.

The easiest way to tell them apart is to check the 8th digit of the VIN code. In addition to valve springs and rockers, the cam needs to match the compression, torque converter, rear-end gears, etc. Cars typically run cams in the high s, while trucks are usually between and degrees on the intake. The trunnion bearings in the stock rocker arms are another known weak point.

The stock rockers are pedestal mounted and are good for. About pound seat and pounds of open spring pressure is the limit for street-driven hydraulic roller cams. We recommend converting to the wedge-shaped timing chain damper found on the early LS2 engines.

After the cam, your next modification should be an aftermarket intake. They make more power and torque over a wide range. A little clearancing and spacing work may be required around the water pump area of your vehicle. If the engine found its way into a car running well over hp of nitrous, a backfire can blow the plastic intake apart pretty quickly.

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This is one of the rare instances a single plane cast manifold begins to make sense. Then a Tunnel Ram is for you. These commonly make around more horsepower depending on the combination. A little lower at 3, rpm, matching at 4, and marching up past there. How about the throttle body? The factory fuel pump will become a limitation around hp.

LS2 vs LS3: Which One is Actually Better?

Tuning the computer changes the fuel and ignition curves to increase performance. Compression is already in the high They are light and can be cut to 2.

Aftermarket heads flow better and have thicker decks to maintain a good head gasket seal. A wide range of runner and chamber volumes are available. Some also go from a degree to a The engine specs and information listed here is for the stock LS2 used in GM passenger cars from 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. This specific guide is for the GM LS2 engine that was found exclusively in passenger cars.

ls2 engine

The LS2 is noteworthy in that it is one of only two LS-series engines the L76 is the other that came in both cars and trucks. The respective car and truck versions of the LS2 and L76 came with different accessory drives, intake manifolds, and oil pans.

They also had different VIN codes. Pingback: Ask Away! Pingback: L33 5. Pingback: L76 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. Bore Dia.

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Stroke 3. Deck Height 9. Bore Spacing 4. Cam Housing Bore Dia. Connecting Rod Housing Bore 2. Crankshaft Rod Journal 2. Exhaust Valve Diameter 1.

Chevrolet LS2 Engine: Specs, Applications, & More

Pushrod Length 7. Author: OnAllCylinders Staff. Leave a Reply Cancel Your email address will not be published.Article may contain affiliate links. As an Amazon Associate I earn from qualifying purchases. This engine was created with a volume of 5. One of the primary distinctions for the Gen IV engine is a generally larger bore.

LS based GM small-block engine

Another major difference is the block modifications for the Gen IV engines that enable the use of active fuel management, or sometimes known as displacement on demand, which is the ability to only use certain cylinders in scenarios where full performance is not required, such as highway cruising.

In the Saab x Aero also added the LS2 option. As mentioned, the LS2 offering was primarily started in with some additional options in The LS2 engine did not stay around too long, as it was only available in the Corvette untilwhile the Saab and Trailblazer SS models kept this as an offering until The LS2 is no longer in regular production but is without a doubt still widely used and retrofitted in many project cars.

ls2 engine

With the larger displacement and higher compression ratio, this engine provided the ability to achieve more power, although there are other limitations in some cases which can help explain the slight reduction in power when going from the LS6 in the Corvette Z06 to the LS2 in the base model Corvette. While the torque number matches peak torque from the LS2, it is reached RPM lower, which certainly improves the feel of the engine. The 6. As mentioned, this bore is slightly larger compared to its Gen III predecessors, with the bore coming in at 4.

Other performance improvements with the LS2 can also be attributed to its increased compression ratio of The LS2 engine is only offered with an aluminum block and cylinder head. The pistons are constructed of hypereutectic aluminum alloy, as is common with almost all of the LS engine family. The pistons used employ a flat top design. 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 platform allowed for more power and the addition of other improvements such as active fuel management. This horsepower engine was first introduced in the base model for the Corvette, and then also made available in other performance driven vehicles. Overall this engine was available in normal production from until LS2 Engine Specs Article may contain affiliate links.See all 21 photos. It's fitting that during the 50th anniversary year of the small-block Chevy, arguably its two greatest variations have been released.

First, the hp 6. Looking back, the small-block engine design that debuted with ci and hp doesn't seem like much of a world beater, but in its day, it was a world-class engine with lightweight head and block castings and an overhead valvetrain that was ahead of its time. Back inChevy's new small-block was just as revolutionary, and in those days, it too was regarded as being heavily influenced by racing technology, so its staggering racing success was pretty much a foregone conclusion.

GM actually refers to the current LS2 and LS7 as fourth-generation revisions of the classic design, although the only direct commonality all four generations share is the 4. Since so many critical dimensions have changed over the years to the point that there are no interchangeable parts, it may be stretching the definition a bit to call these latest incarnations direct descendants of the engines that debuted in the '55 Chevy, but the fact that GM's bread-and-butter small-block V-8s still feature a cam-in-block design with pushrod-activated valves is enough for us to issue a pass on the subject.

We asked Dan Nicholson, GM's chief engineer in charge of small-block and big-block engines, why the company has stuck with pushrods for all these years when so many other manufacturers have gone to overhead-cam designs. That's what will continue to keep it in the ballgame," Nicholson told us, noting that typical customers are more concerned with the practical power and performance an engine delivers rather than the location of its cams or method of valve actuation.

Frankly, we were saying a lot of the same things in the '80s and '90s, but there was a skepticism because it was a little more like, 'Well, you're just trying to sell the stuff you have,' before we had outstanding overhead-cam engines like the Northstar, our new high-feature V-6, and our Ecotec four-cylinder engine," Nicholson says. Now here we are seven or eight years later and the marketplace has spoken, I think clearly, on that.

In the second part, we'll strap that crate engine onto Katech's dyno and test several combinations of cams, heads, intakes, and exhaust manifolds to see just how well the new design responds to good, old-fashioned hot rodding.

Matt King writer David Kimble illustrator. Share on Facebook Share on Twitter.


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