The ZEROSPORT Camshaft Set is a high-performance profile designed specifically for the Nissan TB48 DOHC 24-valve inline-six engine, commonly found in the Nissan Patrol Y61.
Here is the technical breakdown of the specifications listed in your query:
Technical Specifications
- Part Number / Grind ID: 4037 – This is ZEROSPORT’s specific design identification code for this particular lobe shape and configuration profile.
- Engine Compatibility: Nissan TB48 (IN/EX) – This denotes a complete dual overhead cam (DOHC) kit containing both the Intake (IN) and Exhaust (EX) camshafts.
- Duration: 320 Degrees – An aggressive, long-duration profile intended for high-RPM power delivery. A 320° advertised duration usually positions this setup for heavily modified naturally aspirated (N/A) or specialized motorsport/drag applications.
- Valve Lift: 11.5mm – Indicates the maximum distance the valves are lifted off their seats. This high lift profile maximizes airflow but requires critical supporting valve train modifications.
Required Supporting Upgrades
Because of the high 11.5mm lift and aggressive 320° duration, this profile is not a drop-in replacement and requires the following engine adjustments:
- Upgraded Valve Springs: Stock valve springs will encounter coil bind or valve float at 11.5mm lift. High-rate performance valve springs and matching retainers are mandatory.
- Clearance Checks: You must critically verify your valve-to-piston clearance and valve-to-valve overlap clearance.
- Shimless Lifters / Valve Lash Adjustments: Upgraded cams alter the base circle diameter, meaning custom shimming or custom-length buckets are necessary to set proper hot/cold valve lash.
- VVT/NVCS Deactivation: Depending on your tuner's preference for a 320° profile, adjustable cam gears are frequently used to lock or finely adjust timing dial-in parameters