Forged Pistons for Toyota 4AGE 20V 81.5 12:1 ( CP Pistons SC7659)

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 SC7659 pistons, a typical bore clearance of 0.0015" to 0.0025" is recommended. This allows for thermal expansion and ensures proper fitment in the Toyota 4AGE 20V engine. Always verify with your specific application and machining tolerances.

The SC7659 pistons have a compression ratio of 12:1 when used with the standard 4AGE 20V configuration. This ratio is suitable for high-performance applications, but be mindful of fuel quality and tuning to avoid detonation.

Yes, the wrist pins included with the SC7659 pistons are designed for high-performance use and are suitable for high RPM applications. However, ensure proper lubrication and fitment to maintain reliability under stress.

For the SC7659 pistons, it is recommended to set the top ring gap between 0.018" to 0.020" and the second ring gap between 0.016" to 0.018". Adjustments may be necessary based on your specific engine setup and intended use.

Yes, the SC7659 pistons feature deep valve reliefs that can accommodate oversized valves and high lift camshafts, making them suitable for performance builds that require such modifications.