My Dynomax Quiet Crawler Modified Install

[NickarendPDX]

Pulling this thread deep from the grave again...

I've just ordered most the parts to piece this together. I've got a couple questions that I'm hoping someone can help answer.

I'm going with the DM Quiet Crawler because it appears to have the best sound, from what I can tell from all the Youtube videos I've watched. The Wayalife video is what confirmed my thoughts (Thank you for all the videos!). What I'm wanting out of this exhaust is to get a good deep and throaty growl without it sounding like a Baja stuck in the sand. So many exhausts on the Jeep seem to sound way too raspy, way to "Ricey", or both. I want to hear it rumble a bit at idle, growl a bit when when taking off and perhaps hum just a little when cruising. Just enough to know that it's there.

I've got a Banks CAI on and I love the sound, but sometimes find myself getting on the throttle a bit more than I really need, simply because I want to hear that "gargle". So my hopes is that this exhaust will give me a good amount of low end growl and just enough tone while cruising where I don't have to go hunting for the sound. That make sense?

The Dynomax bullet #24246 is what comes with the kit. If after the install, I was looking to make it just a hair louder, could I go with a smaller resonator or would that only effect the tone?

I was talking to an exhaust shop and they said going with a tip that went from a 2.5" to a 3" drop down would also help give it a deeper and more "echo'd" rumble. Would that be true?

 

[aermotor]

Honestly, it's a 3.6 so you're really not going to get much out of it. I find the sound with my setup works well and has some nice tones in different ranges.

No clue re: smaller resonator or a bigger tip, but I don't think they will change it very much.

 

[Ddays]

I was talking to an exhaust shop and they said going with a tip that went from a 2.5" to a 3" drop down would also help give it a deeper and more "echo'd" rumble. Would that be true?

I used a larger dia drop and I believe it was the same as you wrote.

I made it about 100 yards and turned right back around to my garage. IMO it sounded retarded - like an elephant leaving the longest fart you ever heard. Hey, you may like it, but with the muffler, resonater & cat hooked together, the system sounds perfect.

 

[NickarendPDX]

I used a larger dia drop and I believe it was the same as you wrote.

I made it about 100 yards and turned right back around to my garage. IMO it sounded retarded - like an elephant leaving the longest fart you ever heard. Hey, you may like it, but with the muffler, resonater & cat hooked together, the system sounds perfect.

Hahaha! Ok, I appreciate the audio imagery! I'll stay away from doing that then. Obviously when you say perfect, another may say its lacking. But that being said, would you say this system can definitely be heard and known that its got a bit of a growl? I'd assume it has more tone in specific ranges of the RPM's. but taking off from a stop light for example, there is a growl, and then levels out till you put your foot into it?

Honestly, it's a 3.6 so you're really not going to get much out of it. I find the sound with my setup works well and has some nice tones in different ranges.

No clue re: smaller resonator or a bigger tip, but I don't think they will change it very much.

I'm very new to the Jeep/truck world, so forgive my lack of knowledge. It's comments like this that made things difficult for me to get a grasp of tone/volume. I get that a V6 will never sound like a V8. Those that I've seen try to make it sound like such, sound horrible. BUT, to say a V6 isn't going to get much sound out of it, confuses me a little. I know it won't get that muscle car type of deep rumble that a V8 would produce, but I feel that getting a descent rumble (without sounding super raspy) is still possible. Maybe that's where this style of exhaust comes into play?

When picking an exhaust I was trying to avoid the mistake of staying on the more mild side of things, only to be disappointed when starting it because it didn't sound much different than stock. Last week I was really set on the Magnaflow Overland, but couldn't help but think it was just too mild for what I was after. It's so difficult to only go off of Youtube videos because you are relying on how the camera/microphone is picking up the sound. The Wayalife videos gave several situations and angles to get a good idea of what I should expect.

Perfect example is the Banks CAI I ended up getting. Watching Youtube videos, half the owners said they took it off because they thought it was just too loud. I wanted a good throaty gargle, but again not wanting it to be obnoxious. One persons opinion of loud is another persons idea of quiet. After installing, I drove out of my driveway bracing myself. I was honestly expecting it to be louder, and wish it was. It's loud and sounds great, but I wish it was even louder. None of the Youtube videos gave a true idea of what it really sounds like. I'm hoping that's not the case with the exhaust. Obviously, as mentioned, I've already ordered most of the parts, so I will soon find out for myself.

 

[Ddays]

Hahaha! Ok, I appreciate the audio imagery! I'll stay away from doing that then. Obviously when you say perfect, another may say its lacking. But that being said, would you say this system can definitely be heard and known that its got a bit of a growl? I'd assume it has more tone in specific ranges of the RPM's. but taking off from a stop light for example, there is a growl, and then levels out till you put your foot into it?

It's way trickier trying to get a V6 to sound good vs a V8. At low rpm's the V6's can be made to sound decent with a low growl/rumble, but once rpm's increase into the mid-range & above is when they start sounding crappy. Those extra 2 cylinders really do matter. Seems to me that the best systems that produce the best sound include the resonator and the muffler like the Quiet Crawler do. Again, IMHO, the axle back systems seem to sound the worst to my ears.

I'd suggest throwing the Quietcrawler on with the same size downturn (I just made mine out of a 90 & cut the tip myself) & see how it sounds.

 

[NickarendPDX]

It's way trickier trying to get a V6 to sound good vs a V8. At low rpm's the V6's can be made to sound decent with a low growl/rumble, but once rpm's increase into the mid-range & above is when they start sounding crappy. Those extra 2 cylinders really do matter. Seems to me that the best systems that produce the best sound include the resonator and the muffler like the Quiet Crawler do. Again, IMHO, the axle back systems seem to sound the worst to my ears.

I'd suggest throwing the Quietcrawler on with the same size downturn (I just made mine out of a 90 & cut the tip myself) & see how it sounds.

Gotcha, that makes sense and aligns with what I was expecting. Cheers!

 

[NickarendPDX]

Question regarding the connection of pieces as i have all the parts except the extension pieces. If I'm understanding it correctly, all the outer diameter parts are 2.5". I'll be using clamps, so I'll need to extension pipes. Looking at the details of that extension, it's also a 2.5". If all the end pieces are 2.5", how will they fit into one another? My common sense tells me that the extension pipe should have a slightly smaller outer measurement than the internal that it's going into. Otherwise, won't all the pieces just butt up together instead of fitting into it? I've done my part in trying to watch install videos, but did not see anything that included the extension pieces. The only parts that seem to fit together seamlessly is the intermediate pipe and the exhaust inlet. The intermediate pipe has a "stretched" end. I would say that perhaps I'm looking at the wrong part, however I went off the OP's post with item numbers.

I'm sure there is a very logical explanation or step to take. I've just never done this and the videos I watched didn't show this as a step to take.

Thanks in advance to anyone that can give some direction!

 

[jeeeep]

Question regarding the connection of pieces as i have all the parts except the extension pieces. If I'm understanding it correctly, all the outer diameter parts are 2.5". I'll be using clamps, so I'll need to extension pipes. Looking at the details of that extension, it's also a 2.5". If all the end pieces are 2.5", how will they fit into one another? My common sense tells me that the extension pipe should have a slightly smaller outer measurement than the internal that it's going into. Otherwise, won't all the pieces just butt up together instead of fitting into it? I've done my part in trying to watch install videos, but did not see anything that included the extension pieces. The only parts that seem to fit together seamlessly is the intermediate pipe and the exhaust inlet. The intermediate pipe has a "stretched" end. I would say that perhaps I'm looking at the wrong part, however I went off the OP's post with item numbers.

I'm sure there is a very logical explanation or step to take. I've just never done this and the videos I watched didn't show this as a step to take.

Thanks in advance to anyone that can give some direction!

Butt joint clamp or lap joint bands, gives good coverage over the pipe ends and no leaks.

 

[NickarendPDX]

Butt joint clamp or lap joint bands, gives good coverage over the pipe ends and no leaks.

Is that simply an option rather than "the way"? Seems to me that you would want the pipes to be inserted for durability. Maybe I can take the pieces to an exhaust shop and ask of they can expand the ends that need it

 

[Ddays]

All of the pieces I ordered off of the same list fit together perfectly. Did you receive the pieces or looking at pics online? Sometimes the pics don't match the actual P/N on some sites.

 

[jeeeep]

Is that simply an option rather than "the way"? Seems to me that you would want the pipes to be inserted for durability. Maybe I can take the pieces to an exhaust shop and ask of they can expand the ends that need it

it's both, the best way is to weld them together, optional is clamps or what you've stated, take it to an exhaust shop and have the ends expanded; but keep in mind the exhaust will be shorter by the amount inserted into the expanded pipe.

IMO, if you're taking it to an exhaust shop, let them weld it up, I've done that in the past.

 

[Cousin Clyde]

it's both, the best way is to weld them together, optional is clamps or what you've stated, take it to an exhaust shop and have the ends expanded; but keep in mind the exhaust will be shorter by the amount inserted into the expanded pipe.

IMO, if you're taking it to an exhaust shop, let them weld it up, I've done that in the past.

Yea have em weld it up. I welded all of my dynomax kit together.

Over time the press-fit joint at the can from the factory came loose so I had to weld that too.

Could just be from hitting it with rocks though…

 

[NickarendPDX]

All of the pieces I ordered off of the same list fit together perfectly. Did you receive the pieces or looking at pics online? Sometimes the pics don't match the actual P/N on some sites.

Yeah I have all the parts except the extension pipe. The exhaust and the intermediate fit together, but the exhaust and the resonator do not fit into one another.

 

[jeeeep]

Yeah I have all the parts except the extension pipe. The exhaust and the intermediate fit together, but the exhaust and the resonator do not fit into one another.

that's the way mine was, I used clamps no issues

 

[NickarendPDX]

For those who welded, did you use a Mig welder with a 70s steel wire? Asking because my neighbor said he would help me weld it, but needs to know before doing so.

And, I've seen many people post photos of their welded jobs here. Looks like when you weld, you can discard the 5" extensions. Does that effect the length in order to use the exhaust/down pipe bracket (Item #36517)? I would imagine that if you take away the extensions, it shortens the overall length, which would mean it would no longer line up with the down pipe.

I know I've asked many questions regarding this topic. I appreciate the help and guidance

 

[Cousin Clyde]

If it’s 70 series it’s probably an alloy for welding carbon steel. I believe all of the dynomax parts are 304 stainless.

I welded mine with 316L wire, but still the welds themselves rusted almost immediately, being that it’s a muffler.

I’d probably weld mine with 70 series if it’s all I had…

Can’t comment on all the math related questions…i think I had to cut some brackets apart a little to make mine fit lol.

 

[jeeeep]

For those who welded, did you use a Mig welder with a 70s steel wire? Asking because my neighbor said he would help me weld it, but needs to know before doing so.

And, I've seen many people post photos of their welded jobs here. Looks like when you weld, you can discard the 5" extensions. Does that effect the length in order to use the exhaust/down pipe bracket (Item #36517)? I would imagine that if you take away the extensions, it shortens the overall length, which would mean it would no longer line up with the down pipe.

I know I've asked many questions regarding this topic. I appreciate the help and guidance

my Rule before making anything permanent, measure twice and pre-fit.