Chevy 403ci All LS 15°/L92 Bore 4.005 CH 1.110 Stroke 4.000 Rod 6.125 CR 12 Dome Head 68cc (CP Bullets BLS1148-005)

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.

For the BLS1148-005 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and application.

The BLS1148-005 pistons have a compression ratio of 12.1:1. This high compression ratio can improve performance and efficiency, but it's crucial to ensure your engine is tuned correctly and that you are using high-quality fuel to prevent knock.

For the BLS1148-005 pistons, ring gaps should typically be set at 0.020" for the top rings and 0.022" for the second rings. Adjustments may be necessary based on your specific application and boost levels.

The BLS1148-005 pistons weigh 418 grams each. It's important to consider this weight when balancing your rotating assembly, as it can affect engine performance and vibration characteristics.

Yes, the BLS1148-005 pistons may require specific machining for proper fitment, including checking bore size and ensuring the correct ring land dimensions. Always consult with your engine builder for precise machining needs.