Description

Application: Nissan GTR R33 BCNR33 RB26DETT

Tomei Proncam New VALC Profile Camshafts

Cam Duration: Intake 292 degree

Max Cam Lift: Intake 11.50mm

Max Valve Lift: Intake 11.05mm

Cold Valve Clearance: Intake 0.45mm +/- 0.01mm

Valve Timing Centerline: Intake 110.0 degree

Base Circle: Intake 30.0mm

1. Requires high-performance valve springs - Type-B (TM-TA304A-NS05B) springs set
2. Requires high-performnace valve lifters - Tomei valve lifter set (TM-TA307A-NS05A)

Contents: Intake Side x 1 cam

Introduction of Tomei VALC profile Camshafts:

1. The VALC profile allows the valves to open faster and for longer. This translates to faster lift and increased area under the lift curve which in turn generates more power. (Greater area under the lift curve = greater air intake)

2. Unlike the valve opening, the VALC profile ensures that the valves close at a slower rate, helping to prevent common valve train related issues.

3. With a conventional direct-acting valve train, the maximum lift is usually determined by the size / diameter of the valve lifter. Selecting a high-lift camshaft without taking this into consideration often results in the camshaft lobe travelling beyong the surface of the valve lifter. This cuases the lobe to make contact with the edge of the lifter, damaging both components over time. Therefore, the ideal performance orientated high-lift camshaft needs to have a profile that maximizes lobe travel on the lifter without exceeding the outer edge. VALC profile camshafts have achieved this ideal by deliberately reducing the maximum cam velocity to limit lobe travel on the lifter surface (Maximum cam velocity = lobe travel distance on lifter).