Camshaft Lobe Separation Angle — A Practical Primer

What LSA changes in idle, vacuum, and midrange for dirt, drag, and street motors.

Updated 2026-07-19

Lobe separation angle (LSA) influences overlap. Tighter LSA can add midrange aggression and a lumpier idle; wider LSA often aids vacuum and street manners. COMP Cams and similar OEM tech help cover these relationships in cam selection guides.

Duration and lift still rule the power curve — LSA is one lever among many. Match the cam to heads, compression, converter/gear, and how you race.

Use Camshaft Help on this site, then Ask Grok with your engine family and use case for catalog options.

Topics: camshaft · LSA · valve events · duration

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