Camshaft Parameters:
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Camshaft calculations help determine key performance characteristics of an engine's valvetrain. These parameters affect engine power, torque, and operating range.
The calculator uses standard camshaft formulas to estimate:
Details: Proper camshaft selection is crucial for engine performance. Duration affects power band, lift affects airflow, and LSA affects torque characteristics and idle quality.
Tips: Enter duration at 0.050" lift, valve lift, lobe separation angle, and rocker ratio. All values must be positive numbers.
Q1: What's the difference between advertised and @0.050" duration?
A: Advertised duration is measured from the first movement of the lifter, while @0.050" is measured from when the lifter has risen 0.050", giving a more standardized measurement.
Q2: How does lobe separation affect performance?
A: Narrower LSA (104-108°) increases overlap for high-RPM power, while wider LSA (112-116°) improves idle quality and low-end torque.
Q3: What is a typical rocker arm ratio?
A: Common ratios are 1.5:1 or 1.6:1 for pushrod engines, though ratios up to 1.8:1 exist for performance applications.
Q4: How does valve lift affect engine performance?
A: More lift generally increases airflow and power potential, but requires proper spring pressure and piston-to-valve clearance.
Q5: What is a good amount of valve overlap?
A: Street engines typically have 5-15° overlap, while race engines may have 30-60° or more for high-RPM power.