Need some input on my exhaust
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Joined: Feb 2011
Posts: 23
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well i got the truck up on the hoist today to replace the o2 sensor and boy what a cluster f! who ever put the true duals on must of had some major time involved to fabricate all them bends and welds. The o2 i pulled out was a NTK sensor and it didn't look to bad, alittle black but not horribley bad. I wanted to put an "h" pipe in but there really wasn't no room up front for one that i could see, so i just put my new denso senor back in the passenger pipe and reset the pcm. I'm kind of curious to see the benfits from that new senor, but i would ideally still like to put the staock "y" pipe back in and run a single 3" from there. I have no smoke coming out of my tail pipes but my tips are pretty damn sooty black so i know its running rich and i went through and replaced all the new vac lines with new ones.
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Joined: Mar 2009
Posts: 42
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I also have true dual's as well, o2 on passenger side, no cats. I believe it drastically helped my performance, well kinda I will explain. It helps till I run down the interstate about 25 miles, and then my check engine light will come on and gives o2 sensor code, and then it starts to run sluggish. Now I average around 11mpg with 4" lift 33x12.5x15 mud tires.
The reason I believe that this happens is that now that it flows like an engine should, there is no back pressure like it originally had. Which is causing it to run rich. What I am going to do to try and solve this problem is install headers with 2.5" or 3" collector, run 3" pipes about 2.5ft just behind o2, then shrink it down to my existing 2" dual's. Then I am going to add an H pipe between the 2 right were the o2 is. (I moved mine forward enough to do this when I done exhaust just in case) now I'm not a dodge tech like some of these guys, so you may wanna listen to them, but I will post my results after I do that project. Will be a couple of weeks.
Good luck!
The reason I believe that this happens is that now that it flows like an engine should, there is no back pressure like it originally had. Which is causing it to run rich. What I am going to do to try and solve this problem is install headers with 2.5" or 3" collector, run 3" pipes about 2.5ft just behind o2, then shrink it down to my existing 2" dual's. Then I am going to add an H pipe between the 2 right were the o2 is. (I moved mine forward enough to do this when I done exhaust just in case) now I'm not a dodge tech like some of these guys, so you may wanna listen to them, but I will post my results after I do that project. Will be a couple of weeks.
Good luck!
Record Breaker
Joined: Mar 2009
Posts: 2,181
Likes: 3
From: Battle Ground WA
I also have true dual's as well, o2 on passenger side, no cats. I believe it drastically helped my performance, well kinda I will explain. It helps till I run down the interstate about 25 miles, and then my check engine light will come on and gives o2 sensor code, and then it starts to run sluggish. Now I average around 11mpg with 4" lift 33x12.5x15 mud tires.
The reason I believe that this happens is that now that it flows like an engine should, there is no back pressure like it originally had. Which is causing it to run rich. What I am going to do to try and solve this problem is install headers with 2.5" or 3" collector, run 3" pipes about 2.5ft just behind o2, then shrink it down to my existing 2" dual's. Then I am going to add an H pipe between the 2 right were the o2 is. (I moved mine forward enough to do this when I done exhaust just in case) now I'm not a dodge tech like some of these guys, so you may wanna listen to them, but I will post my results after I do that project. Will be a couple of weeks.
Good luck!
The reason I believe that this happens is that now that it flows like an engine should, there is no back pressure like it originally had. Which is causing it to run rich. What I am going to do to try and solve this problem is install headers with 2.5" or 3" collector, run 3" pipes about 2.5ft just behind o2, then shrink it down to my existing 2" dual's. Then I am going to add an H pipe between the 2 right were the o2 is. (I moved mine forward enough to do this when I done exhaust just in case) now I'm not a dodge tech like some of these guys, so you may wanna listen to them, but I will post my results after I do that project. Will be a couple of weeks.
Good luck!
