Tomei PONCAM Exhaust Camshafts 266 Duration 9.80mm Lift Subaru STi EJ207 Version 7-10 Single AVCS

• Optimized 'velocity' and 'acceleration'.
• Designed for high power setups.
• Optimizes engine performance.
• Higher lift than other profiles of the duration.
• Reduced stress/wear on the valve train.
  
  

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)

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

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 lobes traveling beyond the surface of the valve lifter. This causes 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.

A VALC profile camshaft has 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)?

Compared to a standard profile camshaft of the same lift, a VALC profile camshaft can off-set the difference for even greater lift/performance gains.

Specifications:

In/Ex: Exhaust
Advertised Duration: 266
Cam Lift: 9.80mm