8/12/2023 0 Comments Ls2 timing chain tensioner![]() … Adding an L76 Supercharger or Nitrous Oxide System Here are a few parts commonly used for an L76 cam swap: LS2 timing chain, LS7 spec lifters, LS2 timing chain damper, and thick-wall chromoly pushrods. Tech Tip: When you’re pulling the cam, switch out the spring-loaded timing chain tensioner for the more reliable wedge-style (early) LS2 damper. You will want to install a trunnion kit for added reliability. The stock rockers are good up to 175 lbs. ![]() Titanium retainers are another upgrade that will reduce valve float. Spring kits are available for typical 0.600 in. Heads and intake good for another 40+ hp. Still can drive daily.įly-cutting the pistons may be required. Turbo cams reduce overlap with less exhaust duration split in relation to the intake.Ĭonverter recommended. Generally, supercharger cams and nitrous cams will have slightly more lobe separation and longer exhaust duration. There are specific cams in the 230-234 range with intake valve events specially designed to clear the piston without flycutting. Piston to valve clearance with a L76 is tight. What are the limitations to going bigger? If you’re still driving daily, cams in the 215-220 degree intake-duration range can be tuned to idle nearly stock and still provide good mileage.Ĭams in the 220- 226 range are a little more serious, but are still easy to tune, and driveability is still good. If a lifter is already failing, it’s best to go with an AFM delete kit.Īnd if you’re in this deep, why not put a cam in it?!įor more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. If your engine is in good running condition now, you can install an AFM disabler. … Upgrading the L76 Car Engine’s Camshaft and ValvetrainĪs we mentioned earlier, the engine came with AFM-which is known to fail. Before going to the tuner, we recommend installing a colder thermostat to open up the tuning window.īelow are other upgrades you can make to improve the performance of an L76 engine. Getting a tune makes it easier to dial in a bigger cam and injectors later. Raising the factory redline will keep your vehicle in the meat of the powerband longer.Correct the fuel and ignition timing tables.We recommend that you talk with your local chassis dyno tuner to choose a computer programmer. So how do we deal with that? Easy, we tune it out with an AFM disabler or increase overall performance with a programmer. A set of headers and an aftermarket exhaust system will make more power, but the drone can become obnoxious. The factory exhaust system is restrictive in an effort to reduce the drone while in 4-cylinder mode. Here’s the roadmap to upgrading your L76 power plant to achieve maximum performance.įor many people, upgrading the L76 starts off with a cold air intake kit. If you have an L76 and are on the hunt for the best mods, you’re in the right place. The cylinder heads will have either the 5364 or 823 casting numbers. The aluminum block is cast with 6.0 on the back right-hand side and it has a casting number 12568952. Unlike the LS2 or LS3, it will have the ribbed AFM valley cover. If you don’t have the VIN, you will need to look closer. The easiest way to tell them apart is to check the 8th digit of the VIN code. How to Tell the Difference Between L76 and other enginesĪt first glance, these engines look very similar. It was left disconnected on the Holden’s with the exception of the 2009-10 Holden’s equipped with automatic transmissions. They are equipped with Active Fuel Management (AFM) which was activated in the U.S. Without the VVT system used on the truck engine, it had true flat top pistons which resulted in a higher compression ratio of 10.4:1. In this trim, it made 361 horsepower and 385 Ft./Lbs. It used the same block as the LS2, but had rectangle port heads similar to the LS3. In some ways, it bridged the gap between the LS2 and the LS3. The L76 is a Gen IV, 6.0L, aluminum block, car engine which came under the hoods of GM performance sedans between 20.
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