Subject	vacuum is suction through the intake manifold.
Posted by	robo (sebring1970) on May 29, 2008 at 11:29 PM
	This message has been viewed 136 times.
In Reply To	Noob question about boost/vacuum posted by FuerGrissa on May 29, 2008 at 10:59 PM
Message	neg pressure doesn't mean backwards flow. vacuum is created by the air getting sucked through the engine faster than it can be naturally supplied through the intake. This creates lower pressure in the manifold compared to the atmospheric pressure. Even though vacuum is used to run engine accessories (e.g. cruise control), vacuum is really an indirect measure of unused engine potential, since the vacuum is created by the restrictions of the intake manifold against flow. "Straight-line acceleration is probably the first aspect of automotive performance that any intelligent driver gets bored with." Peter Gregg "We owe a lot to the dragsters. They always break something, figure out a way to beef up the part and the benefit trickles down." Robo "Not everything that can be counted counts. Not everything that counts can be counted." Einstein "And now my friend, the first-a rule of Italian driving, [Franco rips off his rear-view mirror and throws it out of the car] what's-a behind me is not important." Raul Julia, playing Franco Bertollini while driving a Ferrari Daytona in the movie Gumball Rally
Follow Ups	Noob question about boost/vacuum - FuerGrissa 22:59:36 05/29/08 vacuum is suction through the intake manifold. - robo (sebring1970) 23:29:27 05/29/08 It's a matter of how much air the pistons are sucking in, - zellamay 10:33:31 05/30/08 Is 0 really the balance point? - Turd Furguson 12:22:35 05/30/08 There is always vaccum in front of the turbos, but I don't - zellamay 13:57:18 05/30/08 You hit it on the head pretty well - Broke_as_**** 15:15:27 05/30/08
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