According to Jesse Kershaw of FRPP, Ford Racing tested the Three-Valve intake to 2.5 bar pressure, or roughly 35 psi, and after some ballooning in the early development phases, the intake manifold ...

In a car's intake manifold, air enters at atmospheric pressure, rushing toward the intake valves at tremendous speed. But when the intake valves close completely, that onrushing air reaches a dead ...

Production figures suggest that as many as 10 Two-Valve GTs were produced for every Four-Valve Cobra. Toss in the tremendous production of 4.6L and 5.4L truck motors, and you have an avalanche of ...

After valve events have been selected, the intake is the primary tuning device for a four-stroke spark ignition engine, just as the expansion chamber is for a two-stroke.

Intake manifolds with poor cylinder-to-cylinder delivery of the working fluid create opportunities to compensate for this problem. Several of these opportunities will be addressed in later paragraphs.