Engine Building

Camshaft duration and maximum lift do not tell the whole story. Learn how aggressive Ecotec cam lobes increase valve acceleration, spring demand and high-RPM valvetrain requirements.

Higher RPM gives an Ecotec valvetrain less time to complete each valve event. Learn how engine speed increases spring demand and why RPM must be matched with camshaft profile, valve...

Understand Ecotec valve spring coil bind, mechanical travel, recommended maximum lift, coil-bind clearance, and why BK Racing advertises a conservative .520" operating limit instead of the system's measured mechanical capability.

Valve spring rate explains how quickly spring pressure increases as an Ecotec valve opens. Learn how rate affects open pressure, camshaft compatibility, high-RPM valve control, and usable spring travel.

Valve spring pressure depends on installed height. Learn how installed height affects Ecotec seat pressure, open pressure, spring travel, coil bind and high-lift camshaft compatibility.

The factory GM Ecotec oil pan was engineered for millions of production vehicles—not sustained high-G racing. Learn why GM never built a true racing oil pan, the compromises every OEM...