LS7, LS3, and LS9 Cylinder Heads Earlier Gen III LS heads, such as those found on LS1, LS6, and various Q Series truck engines, feature tall intake ports referred to as “cathedral” ports. The cathedral-roof shape at the top accommodates the fuel-injector path. The LS2 engine also features cathedral-port heads but is technically considered a […]
How to Choose the Best Cam & Lifters for a Gen IV LS-Engine
Today’s performance aftermarket offers a wide selection of camshaft profiles for enhanced performance, from street-mild to all-out racing competition. While factory camshafts all utilize hydraulic roller lifters, the performance aftermarket offers lifter application in both hydraulic and solid designs. One very significant feature of the LS cam design is its cylinder firing order. While the […]
The Best Intake Options for a Gen IV LS-Engine
EFI and Intake Manifolds The LS engine platform is versatile; as such, you have your choice of carburetion, central fuel injection, or multi-port injection. It all depends on the application and performance goals. The advantages of running a carburetor include lower cost and a more simplified system. Central injection, also called throttle body injection (TBI), […]
Gen IV LS-Engines Explained
LS Gen IV Engine Overview The LS engine family began with what GM refers to as the Gen III engine platform, which included the LS1 and LS6. The Gen IV family began with the LS2 and includes LS7, LS3, LS9, and L92. Although the LS2 engine shared the cathedral intake port head design that carried […]
How to Choose the Best LS Gen IV Engine Block
Engine blocks in the LS family share similar characteristics, with deviations primarily based on cylinder bore size. One of the primary differences between Gen III and Gen IV blocks is the relocation of the camshaft position sensor, which was moved from the Gen III location at the rear top of the block to the timing […]