Chevy LS 15° Heads 4.005 bore, 3.622 stroke, 6.098 rod, 1.330 CH, .945 pin -2.7cc Flat Top 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1145-005)

You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.

Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.

Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.

The BLS1145-005 pistons are designed to achieve a compression ratio of approximately 9.8:1 when used with standard 15-degree LS heads with a 68cc combustion chamber.

For the BLS1145-005 pistons, it is essential to set the ring gaps according to your specific application and intended use. Generally, a good starting point for performance applications is around 0.0040” per inch of bore for the top rings and slightly more for the second rings, but always consult with your engine builder for precise specifications.

When using BLS1145-005 pistons, ensure that the bore clearance is set correctly, typically around 0.0030” to 0.0035” for a performance application. Additionally, verify that the piston-to-valve clearance is adequate, especially since these pistons feature two valve reliefs.

The BLS1145-005 pistons weigh 447 grams each. While lighter pistons can improve engine response and reduce reciprocating mass, ensure that your rotating assembly is balanced accordingly to maintain reliability and performance.

When installing the BLS1145-005 pistons, ensure that the piston pin is properly lubricated and that the piston is oriented correctly with respect to the valve reliefs. It is also crucial to use the correct torque specifications for the connecting rod bolts to avoid any issues during operation.