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Old 11-12-2012, 02:20 PM
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snrusnak snrusnak is offline
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Join Date: Jan 2011
Location: Orlando
Age: 28
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Vehicle: 2010 Dodge Ram 1500
Trim Level: SLT
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
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No, sorry wasn't trying to say that at all. Just saying it's a misconception that back pressure is good. Back pressure is not good. A lot of people will do something like take a stock v6 mustang(or even a v8 car/truck, whatever) and put dual 3" pipes on it and notice a loss in torque(primarily low rpm) and say it's due to not enough back pressure. This is not right. The loss in torque is because the pipe is WAY over sized, and exhaust gas velocity slows down with larger pipe(assuming same amount of flow, or in other words same power coming out of the engine). With less exhaust gas velocity you have less scavenging, less torque, less hp...
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Breathing in and out is good enough for me.
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