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,...

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...

Oil in the intake tubing. Oil in the throttle body. Oil pooling inside the intake manifold. The dipstick pushing itself out of the tube. Rear main seal leaks that keep...

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,...