Quote:
Originally Posted by enkeivette
I like Ben's definition, except for where he said the pressure in the exhaust is greater than that in the cylinder. If this were true, your exhaust wouldn't flow out.
I would say, as the exhaust gas flows into the exhaust chamber, and the chamber is unable to accomodate the full amount of gas without offering resistance (as the gas is being compressed in the exhaust) that is back pressure.
In other words, a 4 year old kid doesn't exert more force than Stone Cold Steve Austin... but he does exert some force on him.
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Very good Adam!!
You have it. People are mistaking Back Pressure with resistance to flow.
Scavenging is something that has to be addressed- that is the final factor.
A balancing act is what is needed with scavenging. Too much and you lose low and mid range. Not enough and the top end suffers.