Technical Resources

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 Ecotec “kicked rocker” failures don’t happen instantly — the valvetrain usually loses control long before the rocker exits the engine. Hydraulic lash adjusters become unstable under high RPM, aggressive...

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.

If you are still running neutral balance shafts, welded shafts, or cut-shaft setups in a serious high-RPM Ecotec engine, you may still be carrying unnecessary rotating mass, chain drag, oil...