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Old 08-02-2006, 08:13 PM   #1
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Exhaust in correlation to forced induction

I know that exhaust needs to be cut larger in diameter if going with a turbo system, but what about super chargers?

Should the pipe be cut at 2.5 inches or 2.25?

2002 V6 Mustang
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Old 08-02-2006, 08:21 PM   #2
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Re: Exhaust in correlation to forced induction

In general, any time you are moving more air in, you are gonna want to move more out as well. An engine is basically an air pump. The more air you move, the more power you will make (assuming fuel and spark are both increased appropriately). Usually the main restriction in this equation is the intake side of things. However because of the way turbos work, they generally benefit more from a slightly larger exhaust than than non-turbo motors.

That being said, I would imagine that a supercharged V6 would still benefit in the increase from 2.25" to 2.5" pipes. I wouldn't go any larger than that though, because 2.5" pipes will support a great deal of horsepower, probably more than the average blown V6 will ever make.

I'd say somewhere between 350-400 rwhp, the step up to 3" may be justified. Possibly a little lower for a turbo car.

Scary stuff.
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