This will destroy the cast pistons in the LSA Forged Pistons are a smart upgrade. (The LS9 came with forged pistons from the factory.) Due to extremely high cylinder pressure, the heads can start to lift around 1,000 hp. At that point, you will need to basically build a whole new engine. The following upgrades will be required.

The LSA was a scaled-back version of the LS9. It used a smaller blower making up to 580 hp. The LSA had less upgrades and wet sump oiling. For specific details about these engines, please follow the links below: Chevy LSA Engine Specs; Chevy LS9 Engine Specs ; Upgrading the LS9 and LSA Engines; Benefits. These engines were built for performance.

Engine Block Specifications. Block P/N: 12623968. Material: 319-T7 aluminum. Casting Number: 12621766. Displacement: 6.2L / 376 c.i.d.

The intake manifold will tell you whether the engine came from a truck or a car. The car manifold has a rounded top and you can see the contour of the intake runners. The truck manifold is about 3 in. taller and has more of a box shape. If you see a supercharger you can skip the chart. You have either an LSA or LS9; Identification Chart

The formula for LSA is: Intake Centerline + Exhaust Centerline ÷ 2. For example, if the intake is 107° and the exhaust is 117°: 107° + 117° = 224° 224° ÷ 2 = 112° (LSA) How does it affect performance? Combined with Duration, the LSA determines Valve Overlap. This overlap has a significant impact on Engine Vacuum and idle quality.

The information below applies to vehicles with the original engine still installed. If you have a second-hand vehicle that doesn't match the info below, the engine may have been swapped out. Follow this link for help Identifying an LS Engine by Inspection. Click on the RPO code in the table to see more details about that engine.

Engine Block Specifications. Casting Numbers: 12568952, 12560799. Material: Aluminum. Displacement: 6.0L / 364 c.i.d. Bore Dia.

What's the bore and stroke for an LS engine? Views: For all Gen. 3 and 4 Chevy small block engines with the same Displacement , the Bore Diameter and Stroke Length are the same.

Related Products: Camshafts & Valvetrain, Cylinder Heads, Engine Assemblies, Oiling Systems, Other Engines & Components, Pistons & Piston Rings, Valve Covers & Dress-Up Kits

The block is secured to the engine stand. It may rotate with the added weight of the cylinder head. Installation Process. Press new Dowel Pins into the engine block. There are 2 dowels per side (in holes #7 and #8). They align the head to the block. Always replace them before installing your cylinder heads. If needed, lightly tap them in with a ...