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 […]
GM LT-Engine Transmission Options For Your Swap
The Gen V LT-series engine uses three specific transmissions from the factory: the 6-speed automatic, the 8-speed automatic, and the Tremec TR6060 6-speed manual. Thankfully, these factory offerings aren’t the only options. Like the LS platform before it, the Gen V LT-series engine uses the standard SBC bolt pattern for the transmission bellhousing, allowing swappers […]
How to Choose the Right Exhaust for your LS-Swapped Chevelle
Gen III/IV engines have the same basic requirements for their exhaust system as other automotive engines, but these high-performance engines have specific EFI system requirements that must be met for the system to perform properly. The LS engine requires at least one oxygen sensor (as many as four), which must be placed a minimum of […]
What is an LT-Engine: The Complete Guide to Understanding GM’s Marvel
Ever since the release of the original small-block Chevy in 1955, Chevrolet engines have been the king of all engine swaps. Some of this is due to the sheer production volume of these engines, but in modern times, aftermarket support and ease of installation has allowed Chevrolet to continue dominating the realm of engine swaps. […]
Gen IV LS Turbo Shootout! Choose the Best for Power
For maximum power production, it’s hard to beat boost from a turbocharger. The cheap-date method for LS owners is to find a 5.3 truck engine in the junkyard then install a cam, springs, and turbo system. This combination has powered some serious street machines, and the same philosophy can be applied to LS3 and LS7 […]
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 […]
How to Install a T56 Transmission in an LS-Swapped Chevelle
The 6-speed T56 manual is the most popular transmission used in LS engine swaps. Formerly offered on the 1998–2002 F-Body and GTO, the T56 bellhousing, flywheel, and clutch pack are readily available. The T56 transmission fits into most GM muscle cars, requiring only minor modifications to the transmission tunnel, if you set the engine forward […]
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