The LS3 is a further refinement of the LS2 engine package, taking engine capacity to 6. Compression ratio in the LS3 is In , GM superseded the Gen 3 engine series with the new Gen 4 series. The LS2 is closely related to the architecture of the LS1, but enjoys a larger 6. The LS2 gains its extra cc of capacity thanks to an increased bore now The compression ratio was also increased to The L76 engine retains the 6. This technology allows four cylinders to be shut down by the ECU during cruise situations to improve fuel economy.
The cylinders are shut down thanks to a special set of hydraulic lifters. The L76 is a mixed bag, as it benefits from the same high-flowing rectangular port cylinder heads as those fitted to the LS3 and L98, but suffers from a conservative camshaft design that was required to work with the AFM.
The result is that the L76 produces 10kW less power than the almost identical L The AFM system is a pain if you intend to fit a performance camshaft, as you will need to replace the special AFM lifters with a conventional set, adding significant expense to the job. The L98 still retains a capacity of 6. Thanks to a slightly more aggressive cam profile than the L76, the L98 produces kW. In stock form, the L98 produces less power than the similar LS2 engine due to the more conservative camshaft design.
With equal cam profiles, the L98 outperforms the LS2 thanks to the superior head flow. Requires available 3. The weight of passengers, cargo and options or accessories may reduce the amount you can tow. Chevrolet Infotainment 3 System functionality varies by model.
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Connected navigation and real-time points of interest only available on properly equipped vehicles. Simple emissions gear. The early F-body LS1 has both. Many people simply run their motors without this smog gear.
It simplifies engine swapping and makes for a cleaner engine bay. These motors came from more premium models than the LS1. As a result, they are probably better cared for and likely had a less hard life. This is blatantly incorrect. The LS6 intake has also been shown to out flow the LS2 intake, despite having a smaller 78mm inlet vs 90mm on the LS2. I thought that the LS1 never came with an LS2 intake.
I have a Z When I enter the VIN it shows that it has a 6. How can this be as I thought only the LS 2 was 6. And LS2 was not installed in the models. Thank you. Are you looking up the VIN from your title or your car? Currently you have JavaScript disabled. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. Most of the engines have the sodium filled valves that were also used along side a higher lift camshaft to up the power over the LS1.
But that is all from the factory. The aftermarket groups these engines together and because they are so similar, power output is very similar. If you must have an early LS due to budget, and you plan to keep things OE — such as the cam and intake manifold, then go with the LS6.
But if you own an LS1, than finding a used LS6 to swap in or pull parts from might not be a bad idea. Just remember, there is no substitute for aftermarket parts. Yup, it is sitting the wrong way in the engine bay. LS4 you ask? Oh yes there is one such engine, and it is the red headed step child of all the LS engines.
This engine was developed for use in front wheel drive vehicles. Its block design is shared with the Vortec engine of the same displacement, but is cast from aluminum. Not too much aftermarket development has been done with these engine as the platforms they were offered in never really were geared toward performance.
The LS2 is the 6. But there is no replacement for displacement, which is the reason the LS2 was rated at a higher horsepower. This engine even had a less aggressive camshaft and depending on where it came from power was usually around — hp. The number is what was found in the GTOs and Corvettes, while the hp number is for the ones that came from the trucks due to the different intake manifold. Although the trucks had much more torque at lower RPM as a result.
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