Combustion chambers have come a long way since these old "real" Pontiac V-8 open-chamber heads, circa 1968 and later. Notice there is no designed-in swirl or mixture motion whatsoever, just the first ...

The angular momentum of a tumble vortex occurring inside a 4-valve spark ignition engine was measured by particle tracking velocimetry, PTV. A cylindrical glass liner was designed for a single ...

A flagrant case of misaligned ports indicated by the carbon formations. During the course of building, modifying or merely "sharpening up" an overhead valve V8 engine, the question of intake port ...

A novel leanburn concept, ' Barrel-Stratification' is proposed. Fuel is introduced into the cylinder through one of the intake ports of a dual intake-valve engine of which the tumbling air motion is ...

Honda's K series has enjoyed a tremendous tenure of performance. It's been a go-to swap for Honda tuners and continues to be an extremely well-engineered and power-dense platform. But the Honda camp ...