Technical Resources

Two Ecotec engines can have identical parts and produce different results. Learn how cam timing, cylinder pressure, decked blocks, milled heads, VVT deletes, and adjustable cam gears influence horsepower, torque,...

What if your Ecotec is leaving horsepower on the table even though the timing marks line up perfectly? From decked blocks and milled heads to VVT deletes and cam degreeing,...

Your Ecotec’s timing marks can line up perfectly and your cam timing can still be wrong. Milling the cylinder head, decking the block, aftermarket camshafts, VVT deletes, and normal manufacturing...

Every decent performance valve spring should prevent valve float. That’s the minimum requirement. The real question is what happens before valve float occurs. Can the spring maintain valve control with...

Most racers think stock Ecotec valve springs are “fine” until catastrophic valve float occurs — but the valvetrain usually starts losing control much earlier. Learn why rocker instability, valve bounce,...

While the OEM balance shaft assembly performs adequately in commuter vehicles, sustained high RPM operation exposes major weaknesses in sprocket durability, chain harmonics, timing stability, and oiling system reliability.