Until there is equalization of pressure between the intake manifold and combustion space, reverse flow continues. But when these two pressures become equal, mixture flow into the cylinder begins.

Figure 6 shows the pressure vs. crank angle at the outlet of the intake manifold at 6,200 rpm (torque peak). The longer runner is doing a better job from peak lift until the intake valve closes.

If you find oil in your intake manifold, it's not something that should be ignored, but what has caused it isn't always clear. Here the most likely culprits.

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 ...

With the stock intake manifold, our test subject laid down 367 rwhp and 307 lb-ft of torque. ... Ford Racing tested the new Three-Valve intake to 2.5-bar pressure or 35 psi, ...

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 ...

The manifold absolute pressure sensor reads the amount of pressure or vacuum (also called “engine load”) in the intake manifold, where outside air is divvied up in proper amounts and ...

When the pressure inside your intake manifold is high — like when you're pressing on the gas pedal — that chip flexes, creating an electrical signal that causes the ECM to send more fuel to ...

Oil catch cans are simple devices that can greatly benefit direct-injected engines. They prevent oil and other contaminants from causing buildup inside your engine's intake manifold. Here's how ...

The new engine formula will reduce intake manifold pressure to 37 inches in 2001, a decrease of approximately 50-60 horsepower, and then a drop to 34 inches of boost will take place in 2002 ...

If you find oil in your intake manifold, it's not something that should be ignored, but what has caused it isn't always clear. Here the most likely culprits.