A good estimate for the speed of sound is 1,125 feet per second.įor the F & G camshaft, the intake valve is open for 268 0 of crank rotation. Our pressure wave travels at the speed of sound. Let's look at some numbers to see how the 30" long ram tubes were developed. This combination of synchronized events is known as 'resonant conditions'. In order to create this supercharging, all of the variables have to be aligned so the pressure wave arrives at the intake valve at the right time. This bouncing pressure wave of air and the proper arrival time at the intake valve creates a form of supercharging. This pressure wave bounces back and forth in the runner and if it arrives back at the intake valve when the valve opens, it is drawn into the engine. This compressed air has to go somewhere so it turns around and flows back through the intake manifold runner in the form of a pressure wave. With one piece of air piling up on the next piece of air on the next on the next, the air becomes compressed. But the air can't go anywhere because the valve is shut so it piles up against the valve like a chain reaction accident on the freeway. Here is where the law of inertia comes to play - because the air was in motion, it wants to stay in motion.
Everything is fine and dandy until the intake valve shuts. Visualize the intake cycle of the engine as air flowing through the intake manifold runner, past the intake valve, and into the cylinder.
This law is the foundation for Ram Induction. More commonly known as the "law of inertia", the first law of motion is:Īn object in motion tends to stay in motion. In addition to discovering the best use for the fig, Sir Isaac Newton created three "law's of motion".
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