The RA301A-NS05J is a high-performance camshaft set from Real Speed Engineering (RSE), designed specifically for Nissan Skyline GT-R models BNR32, BCNR33, and RB26DETT engines. It is built to enhance engine performance by improving the airflow dynamics, optimizing valve timing, and increasing power, particularly for high-revving applications.

Key Features:

• Camshaft Specifications:

  • Duration: 292° (Intake and Exhaust)
  • Valve Lift: 11.50mm (at the cam), 11.12mm (intake valve), 11.05mm (exhaust valve)
  • Lobe Center: 110° (Intake), 115° (Exhaust)
  • Valve Clearance: 0.45mm (Intake), 0.38mm (Exhaust)

• Engine Compatibility:

  • The RA301A-NS05J camshaft is designed specifically for RB26DETT engines found in Nissan Skyline GT-R models BNR32 and BCNR33.

• Performance Enhancements:

  • Increased power output at high RPM.
  • Optimized valve timing to improve the intake and exhaust flow, increasing horsepower and torque.

• Cam Timing:

  • Intake Opening: BTDC 36°, Exhaust Closing: ABDC 76° (292° total duration).
  • Exhaust Opening: BBDC 81°, Intake Closing: ATDC 18° (256° total duration).

• Valve Springs and Lifter Requirements:

  • This camshaft set requires the use of appropriate valve springs and lifters to ensure maximum performance and prevent valve spring binding.

• Installation Notes:

  • The camshafts have higher lift and longer duration than stock camshafts, making installation more challenging.
  • Ensure the cylinder head clearance is checked, as some modifications might be needed to accommodate the high-lift camshaft.
  • Valve timing and piston-clearance adjustments are required when installing these camshafts.

• Additional Requirements:

  • Modifications may be necessary in the cylinder head or the cam gear, and users should ensure proper valve spring clearance to avoid damage to the engine components.