Thread: opinion need , dual exhaust on our car

that's only true in a 4-2-1. engines that fire 1-3-4-2 in a 4-2-1 style will pair 1 with 4 and 3 with 2.

i'm not totally sure, but a true dual like this you'd be able to incorporate cylinder pairing like a 4-2-1, with the high end flow characteristics of a 4-1

so take a 4-2-1 header...cut it up... firing order is? 1-3-4-2...? take 1 & 4 , and then 3 & 2,where the 2 priarmies merg together and run, what like dual 1'' 7/8 piping out to the back of the car????

that would be interesting? then put a dual inlet/dual outlet flowmaster under the car to dual tips at the bumper????

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Pedro you had the right idea to begin with.
sonicgundam you make baby Jesus cry.

so do you think there would be any difference in sound or performance?

say you have an ssac...where the 2 secondaries are they would just not merge into 1(2 or 2.5) and continue dual 1'' 7/8 piping into a dual in / dual out muffler and still 2 pipes all the way to the bumper....

this might sound rellly differnt right? loose alot of power?

Sound would change (most people would say for the worse) and performance would suffer.

why is conceiving this idea so hard for some people? imagine how a dual works on a 2cyl motorcycle.

essentially you'd have 2 headers, and would be designated as a 4-2 design.

yes any 4-1 or 4-2-1 design is easier, and the undercarriage shaping is meant to have only one exhaust pipe running underneath, bet the basic principle of exhaust flow is to have the most minimal resistance to flow. on an N/A car, we use the design to create some turbulence to aid in flow, but otherwise we try to create as little resistance as possible.

yes it's hair-brained and extremely abnormal and no one is ever going to do it, but it's possible.

Why would that do nothing? If the intake is piping through which the air can easily flow and the air filter is the restriction point, why wouldn't two work better? You have less of a bottle neck splitting the single flow through two filters than you would cramming all of the air through 1.
Likewise, if all you had access to were really restrictive mufflers, it would be better to split the flow through two of them (even from a single pipe). I've seen high powered cars with split headers feeding into one tube, then splitting for the dual cats, then rejoining, then re-splitting for dual mufflers. The restrictive points are the cat and muffler, as long as the tubing is mandrel bent and big enough, so putting half the flow through them makes it much less restrictive. Are our cars powerful enough to require such a system? Well, certainly not mine.

As for one can with two tips, one of the best mufflers available for our cars comes that way:

Stromung Exhaust System 1.8 & 2.0 w/Resonator and w/o O2 Bung, Fully 2.25" Stainless steel and mandrel bent, the Stromung Exhaust replaces the stock system from the catback and retains all factory mounting points. Can be easily installed in an hour u

And:

Turbo Mag May '93: SE-Rious Performer

LOL, i think he just called me b13pony...

actually thats what im planing on doing with my nx im going to take the 4-2-1 and cut the 2 pipes probubly increase size to 2" all the way to the cat and merge in to 2.5" to 3' cat and split back out in to 2 2" pipes runing to the back the cat would be acting like an x pipe witch all true dual exhaust systems use enyways to cut out the poping sound

That's would be like I was talking about.... When are you planning on doin it? It think it will sound great IMO ... But would cost double considering you'd need 2 separtte pipes running but should sound good I think... Instead of a cat just put a two, 2" dual in ,2" dual out flowmaster mufflers under the tunnel of the car then just two,2" pipes out to the bumper... No need for a cat.... Unless you do emissions...