Tomei camshaft have gain world wide recognition for performance, race and streetability. ''VALC' profile features- Velocity, Acceleration, Lift, Control. The VALC profile allows the valves to open faster and longer. This translates simply to faster lift and increased area under the lift curve. This generates much more power than other camshaft profiles (greater area under the lift curve = greater air intake). 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 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)
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.
Strict phase angle tolerances minimize the risk of valve timing issues and ensures each valve opens and closes precisely. Tomei research showed that some camshafts from other manufacturers had more than 5 degrees difference in the phase angle! This makes it near impossible to achieve the correct valve timing.
- 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.
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