#Compression ratio calculator ls series

Topping off the engine is a thermoplastic composite intake manifold intended to reduce weight and lower inlet air temperatures.įurthermore, with the removal of the distributor, the ignition is now controlled by the ECU, firing a set of eight coils mounted near the spark plugs.

Hypereutectic aluminum flat-top pistons providing a 10.2 compression ratio.

Unique, cathedral-shaped intake port heads.

A larger 55mm (2.165-inch) journal hydraulic roller camshaft.

To add strength, engineers created a deep skirt block where the pan rail extends below the bottom of the 4-bolt main caps using a pair of 8mm horizontal bolts to laterally locate each main cap. The LS was originally intended and designed as an alloy block. With the advancement of materials over the previous generation small-blocks, the LS1 offered a 45hp bump in power as well as a 12% reduction in weight compared to the outgoing LT1 engine used in the C4 Corvette. Other than the displacement (5.7L / 347.5ci), the aforementioned rod bearings and physical dimensions with previous generation LT1 small block, the LS1 was a new all-aluminum single-cam pushrod engine with a bore and stroke of 99 mm × 92 mm (3.898 in × 3.622 in) making this GM’s first all-aluminum production V8. LS1 Horsepower, Torque & Technical Specifications (aka the “Geeky Stuff”) The development of the LS1 was mainly attributed to the ever-increasing CAFE ( The Corporate Average Fuel Economy) requirements, thus reducing weight, increasing power, and improving fuel efficiency were the problems that the LS1 was designed to solve for GM. Further advancements compared to previous generation small block V8’s was the change from distributor ignition to coil-near-plug design, offering much more precise ignition timing using computers.

For those lucky enough to have the LS1 in their cars, the blocks were made of aluminum, while the truck and van versions were cast iron.Įven the aluminum blocks for this generation of motor offered nearly the same strength as the older Gen I/Gen II iron blocks. Little did GM expect for the LS1 has become a legend in its own time, offering impressive “out of the box” performance for the physically compact package. It was introduced in 1995 as the “GEN III” engine and it only shared rod bearings, lifters, and bore spacing with its predecessors (which was in production 1955 until 2003). The LS1 is the spiritual successor to the “small block V8” that GM uses in rear-wheel-drive cars, trucks, and vans. In this article, we’ll be walking through the history of the LS1, some general technical specifications as well as provide some further insight into notable vehicles and/or records that the LS1 has been able to collect over the years. These are relatively inexpensive and robust platforms to build excellent street/strip engines from.

#Compression ratio calculator ls series

When people talk about V8’s, especially in the domestic world, the LS series of engines always come to mind. 1997-2004 Chevrolet LS6 Engine Ultimate Guide