Dual Exhaust, Better or worse? Options

[BigJ]

Hey i was thinking about running dual exhaust on my car. I was gonna get a 4-2-1 system and cut it off b4 it turns into one and run two exhausts. Each with thier own resonator and everything. Ive heard some people say that dual exhausts on imports can actually decrease power? HOw could it decreas power? I dont know if those people know what they are talking about. I know our cars dont need duals.....but the look and sound quality would kick ass. Does anyone know?

This post has been edited by BigJ: Oct 3, 2004 - 4:30 PM

[shid]

Like super, like kwanza said; you never need back pressure, it's ALWAYS bad.

What you WANT is gas scavenging; which is the ability of gas particles to latch on to one another and pull themselves through the engine. The larger your exhaust, the further apart the gas particles (since they're like goldfish, and will fill to any available space). Backpressure only hinders gas scavenging, it's like a red light. You want to eliminate backpressure while maintaining a good size for gas scavenging; and later on exhaust velocity. That means you don't go as big as you can go- to get the right size for a dual exhaust you'd have to have rediculously small piping.