Adverse Affects of Gutting Cats

[oldgeek]

Can some one explain "scavenging" and "reversion" to me, I'm slow.

Scavenging is what I have to do in the refrigerator when my whining has no effect.

Reversion is what my parents kept talking about when looking at me, mentioning DNA, all the while pointing the finger at one another.

 

[Broosedamoose]

No engines require exhaust back pressure, this is a myth.
Someone else above mentioned exhaust savaging. witch is all related.
You want to get your exhausts velocity as high as possible, if you make the pipes too big for the amount of exhaust that needs to flow then you are going to start to decrease the exhausts velocity. This is where that myth comes from, you put too big of an exhaust on and you loose your bottom end because you are not flowing enough air to have effective exhaust scavenging.

An exhaust system is only going to have peak effectiveness at a certain RPM range on a given engine.

Then someone says "this engine must need some back pressure to run right."

Well this is why I like this forum so much. I can learn things I did not know! Thanks for all the input and explanations!