![]() The trunnion bearings in the stock rocker arms are another known weak point. Titanium retainers are another upgrade that will reduce Valve Float. Spring Kits are available for typical 0.600 in. Keep in mind, piston-to-valve clearance is tight with cams over 230° duration 0.050 in. In addition to valve springs and rockers, the cam needs to match the compression, torque converter, rear-end gears, etc. It reduces hot spots in cylinder #7 that cause the piston rings to butt and crack the piston. Some also go from a 15 degree to a 13.5 degree valve angle for even more power.Ī 4-Corner Steam Kit is another smart upgrade. A wide range of runner and chamber volumes are available. The heads flow better and have thicker decks to maintain head gasket seal. There are many Aftermarket Heads available. It is also common to mill them up to 0.030 in. They can be CNC ported for better air flow. Light weight, hollow stem intake valves from the LS3 drop right in for high rpm use. The L76, L98, and L77 heads have rectangle intake ports, like the LS3/L92 heads. For high rpm engines (7,000+), LS3 intake valves are lighter and can be cut to fit. ![]() You don't want to go much higher when running pump gas. However, compression on these engines is already in the high 10:1 range. The heads can be milled for more compression. The LS2 has cathedral port cylinder heads which can be CNC ported for more airflow. The chart below lists standard specs compared to common performance Rotating Assemblies. stroke crankshaft costs about the same and increases displacement. Upgrading to a Forged Crank early in your build will save you the headache later. If you're getting forged pistons, upgrade to Forged Connecting Rods at the same time.Įven though it’s cast, the crankshaft can handle about 900 hp. This prevents the piston from rocking at BDC and scraping up the skirts. When stroking, choose a piston with minimal skirt taper. A set of Forged Pistons should be high on your priority list. They will crack in high horsepower engines. The stock pistons are a known weak point. However, you will want to upgrade to Head Studs and Main Studs if you plan on using boost or nitrous. The block can handle 850 to 1000 horsepower. When bored and stroked, displacement can be as high as 408 c.i.d. However, we recommended leaving them as thick as possible when running boost. On a stock engine, the following upgrades can improve performance and fuel economy:īelow are more upgrades that will improve the performance of the LS2, L76, L98, and L77 engines. The aluminum block, 6.0L engines are light and durable, with many options for increasing power.
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