Quote:
|
Originally Posted by Deltona Couple
I got the same question wrong Twisted. But I disagree. as the piston moved downward, it creates a vacuum or "suction" on the opening where the valve is. That is why when an engine is running, it has vacuum in the intake, that is used for brake boost and any other vacuum operated device on the car. Suction DOES exist. But still an interesting test.
|
No, they're right, the piston moving down produces a low pressure area that is filled by the atmospheric pressure pushing air in. It seems like a trivial distinction, but it is helpful to know an NA car recieves air at 14PSI when you're doing turbo or supercharger calculations (at a very very crude level, 14psi = twice as much air = twice as much horsepower, allowing for proper support mods.)