[bestatchess]

I did notice when taking my foot off the gas I hear a poppy/clangy sound from up front, almost as if a bracket or hangar was loose (metal on metal pingy sound), if at low speed anyway. Not sure if that is normal with headers or just new stuff breaking in/seating, but I'll keep an eye on it.

That doesn't sound normal. Maybe one of the small heat shields is loose? There is a pair up front, near where the oem cats were located, and more of them aft. Also, the header nuts often need to be retightened after a few hot-cold cycles, or you may get an exhaust leak.

 

[El Equis]

I drove it more after work, and the sound is actually coming out the back. Almost sounds like a metal piece dragging on the ground or hitting the tire, except it's not relative to movement just to letting off the gas or certain RPM's. It's not rhythmic, kind of random. Can someone describe what CIS is? I imagined it sounding literally like a card in spokes, rhythmic and consistent with speed or rpm.

 

[sudden urge]

CIS is during heavy acceleration and not when letting off the gas.

 

[natedog]

El Equis do you mind telling me how much or round about what Up rev charged for the header install? i live in new braunfels and am looking for a shop to put my DT's on and want to get Osiris as well, i have called them but no answer, figured they were pretty busy.

 

[ostaF]

What uprev maps did you go with?

 

[layer1]

Don't know about you all but I'd be curious on the before and after Dyno numbers...

 

[gary748]

Congrats on the headers and UpRev! It's kinda hard to imagine what you're talking about from your description, but it doesn't sound like the CIS sound. In addition to the heat shields, check the engine mounts and make sure they didn't break a bolt or forgot to tighten one of them during install. It may also be the O2 sensor connectors banging against the tranny tunnel :dunno:

 

[halfoftwo]

It could be your tail pipe hitting your bumper. When I first did a dual exhaust, I had that. It took me a while to figure it out.

 

[El Equis]

El Equis do you mind telling me how much or round about what Up rev charged for the header install? i live in new braunfels and am looking for a shop to put my DT's on and want to get Osiris as well, i have called them but no answer, figured they were pretty busy.

I sent you a PM with the info.

What uprev maps did you go with?

I went with
1: 87 octane performance tune
2: economy tune
3: stock tune
4: 93 octane performance
5: Anti theft mode (1MPH, 1000RPM)


LAYER1 - No before numbers from the dyno. When I picked it up from Uprev they were having a printer issue and I needed to get on a conference call, so I asked them to send me a PDF. Haven't got it yet so I don't even have after numbers.



ALL - In listening to the sound more, it is definitely coming out the tailpipe and I can hear the irregular pop/ping going 70 on cruise control. I didn't have a chance to take it out tonight, so more troubleshooting tomorrow. It almost sounds like something loose IN the piping, but when turning her over and revving her up in the garage I didn't hear what I hear when moving so something loose is what it could be. I'm going to go back out and look now, I just came in to share this sound clip:

 

[Toomnymods]

ALL - In listening to the sound more, it is definitely coming out the tailpipe and I can hear the irregular pop/ping going 70 on cruise control. I didn't have a chance to take it out tonight, so more troubleshooting tomorrow. It almost sounds like something loose IN the piping, but when turning her over and revving her up in the garage I didn't hear what I hear when moving so something loose is what it could be. I'm going to go back out and look now, I just came in to share this sound clip:

YouTube - Nissan Titan - DT LTs, Berks, JBA - Sound Clip

I bet the sound your hearing the the rear portion of the exhaust clanging around.. it comes with this clamp but the clamp doesnt clamp it tight enough to keep it from moving around.. it has to be tack welded.. should be the last portion of the pipe last 3-4' have a exhaust shop weld that for you so it isnt moving around

as for the muffler swap, the muffler you want is this one.. it will give a deep growl not as raspy as the jba..

http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=9069

 

[El Equis]

Uprev did weld the last hangar to the exhaust, there's only about 1.5' after that. Seemed tight when trying to move by hand, not enough to hit body. But something is hitting, I just need some time to troubleshoot.

 

[Toomnymods]

Not talking bout welding the hanger.. weld the pipe that slips inside the last section of pipe otherwise ur tip will fall off

 

[gweasel77]

Congrat's on the awesome new mod's! Sound's like it's breathing really good now!

I do here the CIS though. I would try the muffler swap Toomny suggested.

 

[El Equis]

Thanks Toomnymods, I'll check that connection.

What is the difference between that 22' Magnoflow "high performance" and the 24" Maganflow XL BBTruck recommends? High flow model is twice as expensive.

 

[Toomnymods]

Thanks Toomnymods, I'll check that connection.

What is the difference between that 22' Magnoflow "high performance" and the 24" Maganflow XL BBTruck recommends? High flow model is twice as expensive.

The one I reccomended wont be raspy.. thier is a ton ofs packing material.. other one is probably a straight thru design and have the chance of still being raspy..

 

[El Equis]

"Tons of packing material" sounds like a performance reducer to me. I also read on another thread that it was intended as more of a factory muffler replacement. I do want it quieter, deeper, and not raspy/pingy but I also just paid a lot of money to improve performance. I'll have to weigh the pros/cons.

 

[Toomnymods]

"Tons of packing material" sounds like a performance reducer to me. I also read on another thread that it was intended as more of a factory muffler replacement. I do want it quieter, deeper, and not raspy/pingy but I also just paid a lot of money to improve performance. I'll have to weigh the pros/cons.

lol if it worked for my titan im sure it'll be more than good enough for 315-325hp titan
i ran my fastest n/a time with that muffler it still is a straight thru design it just has a internal splitter that divides the airwaves to further reduce the soundwaves.. kinda like a backwards y pipe then it rejoins the 2 sides again at the end of the muffler

 

[El Equis]

Well, that's a good point. I forgot I was talking to toomnymods! If it's a performance reducer I am sure you wouldn't use it.

 

[El Equis]

My Titan is pretty weak, here are the Uprev charts