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Old 01-14-2013, 10:32 AM   #1
MaddMax
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Default Will the resonnance/vibration on my Nameless axleback (Magnaflow) get better?

On Saturday I installed my Nameless axleback on my 2012 WRX hatch. This is the Magnaflow muffler setup. The sound is good, but I hate the fact that I can feel the bassy vibrations of the muffler through my seat, the pedals, etc, specifically when starting out in 1st gear. It's exactly what I wasn't looking for. Everyone said this axleback is the quietest one on the market. Too bad they didn't do a better job noting that the bassy rumble creates a resonance/vibration issue throughout the cabin. I guess that's just the nature of applying an aftermarket muffler not specifically designed to cancel out the certain order exhaust pulses of these boxer motors. I couldn't imagine having something louder. Perhaps I'm getting too picky in my 38 y/o age now.

I'm pretty sure most of the vibration is caused by the resonnance effect of the Magnaflow muffler. There are no clearance issues with the muffler and chassis. I did note the four rubber hangers that suspend the muffler keep the muffler position very tight. I remember the stock muffler was on there fairly tight as well. I doubt the tightness of hangers is causing the vibration.

For those that have this setup, did this resonnance/vibration tame itself has the muffler gets broken in? It has been in the teens and 20s here in KC. I don't know if that anything to do with causing excessive NVH, perhaps with colder than normal piping and stiffer rubber on the hangers.

I'll give it another week or so to see if it quiets down a bit. If not, I've given up on aftermarket exhausts. This is the second car and aftermarket exhaust I've had where the bassy/drone has been an issue.
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Old 01-14-2013, 02:26 PM   #2
RoadKillDMD
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You may want to consider getting a resonated mid-pipe to help mellow out the 'bassey-boomy'-ness of the exhaust. I have heard cold weather makes an exhaust louder. I have also heard, as the exhaust builds up the miles, it will incrementally get louder and louder.
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Old 01-14-2013, 02:33 PM   #3
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Actualy it should get less "tinny" sounding with miles due to the carbon build up on any lips ect on the inside of the piping.

If your using Poly hangers they will transfer a bit more literal vibration into the cabin....swap back to the OEM rubbers. Besides that its like RoadKillDMD said a resonator before the muffler is about all you can do.
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Old 01-14-2013, 02:36 PM   #4
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This might sound like me suggesting that you throw good money after bad, but many people have said drone is significantly reduced by adding equal length headers.
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Old 01-14-2013, 03:47 PM   #5
MaddMax
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I'm running the stock hangers. They're not bound up and the muffler is positioned where it should be. The vibration in question is not the exhaust contacting the chassis anywhere.

I've been talking with xluden since he's had so many exhaust setups and he's fairly convinced the mild vibration is the result of drone/bass of the system itself.

I'm going to give it some time and see if everything mellows out. I'm also going to play around with the rubber hangers a bit just make sure they're not the culprit here.

I'm definitely not going to mod anything else on the exhaust to try and correct the issue. If I still don't like it after a couple more weeks, I'll just sell it.
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Old 01-14-2013, 04:42 PM   #6
jpatt006
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Does it get quieter as it warms up? Even my stock exhaust (when I had it) used to sound loud and cause a little vibration when it first started up, but it would quiet down as the engine and exhaust got warm.

I have the exact same nameless system on my hatch and it is MUCH quieter than my previous Invidia and TurboXS exhausts. I could feel and hear both of those, but I don't get any vibration or boomy-ness from the nameless.

Another suggestion is to check the midpipe to axelback connection for leaks. Are you running a gasket in addition to the conversion plate provided by nameless, or do you just have the conversion plate?

Last edited by jpatt006; 01-14-2013 at 04:52 PM.
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Old 01-14-2013, 05:08 PM   #7
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Quote:
Originally Posted by jpatt006 View Post
Does it get quieter as it warms up? Even my stock exhaust (when I had it) used to sound loud and cause a little vibration when it first started up, but it would quiet down as the engine and exhaust got warm.

I have the exact same nameless system on my hatch and it is MUCH quieter than my previous Invidia and TurboXS exhausts. I could feel and hear both of those, but I don't get any vibration or boomy-ness from the nameless.

Another suggestion is to check the midpipe to axelback connection for leaks. Are you running a gasket in addition to the conversion plate provided by nameless, or do you just have the conversion plate?
When I start the car, yeah, there's more volume and vibration. That does die down. At idle, it feels like stock. If I do a neutral rev, I can feel some minor vibration and then bassy rumble and muffler pop/rumble as the revs come down.

You don't get any sort of vibration/bass felt through your seat as this system revs up in first or under high load (ie high gear, low rpm, medium throttle)?

I'm running the factory midpipe to muffler gasket (2.5" ID). Nothing else was provided by Nameless. What exactly is this "conversion plate" or are you talking about the flange on the axleback?

There's no exhaust leak. I tested that. The Nameless muffler flange mounted up cleanly to the OEM midpipe.

Thanks posting your experience.
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Old 01-14-2013, 05:25 PM   #8
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As was suggested above, you could try getting the resonated midpipe. That should help with the droning a bit.

I will say though that when I was looking at exhausts, I found the nameless systems to all be quite loud.

I'm sure you don't want to switch exhausts again, but if this one does not work out and you get rid of it, I would recommend the Cobb exhaust for what you seem to be looking for.
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Old 01-14-2013, 06:34 PM   #9
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Quote:
Originally Posted by MaddMax View Post

When I start the car, yeah, there's more volume and vibration. That does die down. At idle, it feels like stock. If I do a neutral rev, I can feel some minor vibration and then bassy rumble and muffler pop/rumble as the revs come down.

You don't get any sort of vibration/bass felt through your seat as this system revs up in first or under high load (ie high gear, low rpm, medium throttle)?

I'm running the factory midpipe to muffler gasket (2.5" ID). Nothing else was provided by Nameless. What exactly is this "conversion plate" or are you talking about the flange on the axleback?

There's no exhaust leak. I tested that. The Nameless muffler flange mounted up cleanly to the OEM midpipe.

Thanks posting your experience.
Ok. The "conversion plate" I was referring to is the muffler to midpipe gasket that you mentoned. I just called it that to differentiate between it and an actual exhaust gasket, since it is used to mate the 3in muffler to the 2.5in midpipe. I run the gasket they provide as well as a 3in gasket left over from one of my other exhausts.

The stock midpipe is already resonated. I dont know how much adding a second resonator would help since most of the volume is determined by the muffler. It may help with vibration, but more likely it would just be a waste of money.

Edit: missed your first question. I get very little vibration at any rev/load range. Any that I do get, I attribute to my 3in downpipe. Noise and vibration are very subjective and relative. Like I said, I used to have an Invidia (Q300), one of the louder exhausts for the hatch, so my perspective may be a little skewed.
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Old 01-15-2013, 02:34 AM   #10
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OK, so I met up with some local GR hatch owners tonight. They confirmed that I'm just a whiney woman. They drove and road in the car and said its very tame compared to most everything else. They saw and felt no issues. They thought it sounded great too. The cars there included ones with the Cobb CBE, Magnaflow CBE, and Perrin CBE. Perhaps I'm just getting too old. My previous car was a G35 and its fairly quiet refinement probably spoiled me a bit as well.
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Old 01-15-2013, 07:16 AM   #11
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We're actually in the process of finalizing a hatch design (for EL, but the same principles apply). The hatch models resonate like a giant speaker because all the chassis mounting point are in the hatch area with little sound deadening between. This turns your car into a big exhaust speaker. Very different from the sedan. Definitely make sure your hangers are all being used, are all hanging straight down and there is no tension in the system.

If this doesn't help (I'm going to go out on a limb and say marginal improvements at best), then you need to install a resonator. From what we found, this makes a SIGNIFICANT difference in in-cabin sound as it significantly mellows the pulse to pulse energy before the hatch area, significantly reducing penetration into the cabin.

Now our exhaust is pretty freaking quiet because we used HUGE bends, not many of them (fewer equals less turbulence, more flow, less backpressure = less force put into the tubing/chassis), go through the muffler straight, and all straight through sound absorption technologies (no baffled muffler/resonator).



As far as break-in goes, it depends on the packing material that was used. Fiberglass is generally more effective, has no break-in, but will break down over time loosing sound deadening properties. Metal packing material (more common in our community) will have the most sound deadening properties after the internals are carbon coated (break-in) and they significantly outlast their glass counterparts.
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Old 01-15-2013, 08:04 AM   #12
xluben
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Quote:
Originally Posted by MaddMax View Post
OK, so I met up with some local GR hatch owners tonight. They confirmed that I'm just a whiney woman. They drove and road in the car and said its very tame compared to most everything else. They saw and felt no issues. They thought it sounded great too. The cars there included ones with the Cobb CBE, Magnaflow CBE, and Perrin CBE. Perhaps I'm just getting too old. My previous car was a G35 and its fairly quiet refinement probably spoiled me a bit as well.
Unfortunately, this is what I feared. That's probably just how it is.

And many people are suggesting a resonator. The stock midpipe already has a resonator! And it's smaller piping. I really don't think that buying a new midpipe with larger piping and a larger resonator will help much. It may actually make things worse.

Quote:
Originally Posted by KillerBMotorsport View Post
We're actually in the process of finalizing a hatch design (for EL, but the same principles apply).

Now our exhaust is pretty freaking quiet because we used HUGE bends, not many of them (fewer equals less turbulence, more flow, less backpressure = less force put into the tubing/chassis), go through the muffler straight, and all straight through sound absorption technologies (no baffled muffler/resonator).
I think I'm going to PM you about this...
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Old 01-17-2013, 09:14 PM   #13
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Yeah that exhaust is pretty quiet in AxleBack configuration. We actually developed all of the rest of our hatch exhaust product line because of the fact that the Magnaflow muffled version was far too quiet for most people. When it was the only AxleBack configuration we had available we routinely had people buying new front sections of the midpipe without the resonator to pick the sound up slightly.

Is there a specific resonance RPM/load combination that you're experiencing. I'd love to figure out what you're referring to and do my best to help.

Jason Griffith
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Old 01-17-2013, 09:46 PM   #14
MaddMax
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Quote:
Originally Posted by NamelessPerformance View Post
Yeah that exhaust is pretty quiet in AxleBack configuration. We actually developed all of the rest of our hatch exhaust product line because of the fact that the Magnaflow muffled version was far too quiet for most people. When it was the only AxleBack configuration we had available we routinely had people buying new front sections of the midpipe without the resonator to pick the sound up slightly.

Is there a specific resonance RPM/load combination that you're experiencing. I'd love to figure out what you're referring to and do my best to help.

Jason Griffith
Engineering Director
Nameless Performance, Inc.
I got notification that you've sent me something via USPS priority mail. Is this the special gasket by chance? I didn't get any gasket with my order. All i got was the muffler, an invoice, stickers, and a coozy. I wasn't aware I was missing a gasket until it was noted earlier in the thread. It makes sense why I'd need one. I was going to update the thread once I got a gasket from you guys. I wouldn't be surprised if there was a leak after the system warmed up. I had to yank the muffler because the system was too loud for me. I'll put it back on once i get the gasket and let you guys know.

Last edited by MaddMax; 01-17-2013 at 11:21 PM.
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Old 01-17-2013, 10:04 PM   #15
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The gasket NP provided helped me a lot, mine (NP magnaflow axelback for a 5dr GR) was droning like crazy before, using RTV red helped a little, and using the proper gasket that NP provided made the biggest difference.
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Old 01-18-2013, 01:25 PM   #16
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Quote:
Originally Posted by MaddMax View Post
I got notification that you've sent me something via USPS priority mail. Is this the special gasket by chance? I didn't get any gasket with my order. All i got was the muffler, an invoice, stickers, and a coozy. I wasn't aware I was missing a gasket until it was noted earlier in the thread. It makes sense why I'd need one. I was going to update the thread once I got a gasket from you guys. I wouldn't be surprised if there was a leak after the system warmed up. I had to yank the muffler because the system was too loud for me. I'll put it back on once i get the gasket and let you guys know.
Yep, that's your issue! We did have three that went our recently without gasket as we have a new shipping helper who didn't realize they required that gasket. You'll have the gasket in no time - probably today, to be honest. I thought from your description that you had one in there. :-( Sorry about that.

Jason
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Old 01-18-2013, 01:49 PM   #17
MaddMax
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Originally Posted by NamelessPerformance View Post
Yep, that's your issue! We did have three that went our recently without gasket as we have a new shipping helper who didn't realize they required that gasket. You'll have the gasket in no time - probably today, to be honest. I thought from your description that you had one in there. :-( Sorry about that.

Jason
Thanks, Jason. No worries. Please don't take my thread as a bash to your product either. Even if it's too loud with the new gasket, it still probably won't be to loud for most everyone else. I'm picky and knew the risk. I'll post up the results after I get the gasket. Fingers are crossed.
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Old 01-18-2013, 03:08 PM   #18
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Why doesn't it seal with the OEM gasket? Is the flange that much larger?
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Old 01-19-2013, 12:32 AM   #19
MaddMax
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So I installed the Nameless gasket. Yeah, it makes a big difference. There was definitely a leak with just the OEM gasket as the OEM gasket barely covered the 3 inch opening of the Nameless system. Gone is a majority of the resonance, boominess, and vibration. It's a much cleaner sound and I think it will be tolerable for my picky ears.

So let that be a lesson to you guys. If you get a Nameless Magnaflow system and want more noise, just yank out the Nameless gasket

Jason, should I run your gasket only or both together? I'm running both right now.
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Old 01-19-2013, 11:00 PM   #20
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I wonder if that gasket would help reduce the noise on my muffler delete axle back. If anybody is interested in trading their magnaflow version for mine, pm me .
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Old 01-20-2013, 11:56 AM   #21
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I've tried Magnaflow mufflers and/or complete exhaust systems on a few different vehicles,... and they've always been the worst available.

The droning in my 4.0 Grand Cherokee was so bad on the freeway that the insulation from the headliner would turn to dust and make the air inside dirty. I almost had to wear headphones.

I had a Magnaflow on my STI,.. also.

Friend had one on a Vette.

All were soon removed because of droning.

They're TERRIBLE mufflers (despite what the guys at Magnaflow told Mario Andretti)

I now have a Maddad Whisper 3" twin-tip on the STI. Love it (but they're not cheap).
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Old 01-20-2013, 03:05 PM   #22
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I have to say I'm not experiencing any drone. Just the boxer the rumble, especially in the lower RPMs when starting out in first and second.
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Old 01-23-2013, 10:49 AM   #23
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The sound gets louder over the forst month or so. Seems the Magnaflow muffler packing is largely blown out by then.
.
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