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). 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 travelling 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. 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). High lift profile without taking lifter size/radius into account. Compared to standard profile camshafts of the same lift, VALC profile camshafts are able to then then off-set the difference for even greater lift/performance gains.
The item "Tomei Stage 1 PonCam Cams Camshaft for Subaru Impreza WRX STI EJ25 Single AVCS" is in sale since Tuesday, November 17, 2020. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Other Engines & Engine Parts". The seller is "autocat51" and is located in West Covina, California.
This item can be shipped worldwide.