Originally posted by HarryC
Bernoulli is usually misunderstood to have said that in a venturi, the speed rises and causes a pressure drop. He said no such thing. For the speed to rise, a force must be applied. If no energy is being added or removed, where did the force come from? The pressure drop of course. So the pressure drop caused the speed to rise. But why did the pressure drop? Because the speed rose! And round and round it goes.
In our engines the force comes from the piston rising and causing a pressure drop below the carby. So there's no roundy roundy stuff
