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Old 03-19-2009, 02:19 PM   #1
SaabaruMike
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Default Who has had luck killing drone in their wagon?

I know there are lots of threads on this, but I want to hear some personal experiences and share my own. I have a ERZ exhaust and it is LOUD. I really like the sound, but it's too droney for long road trips. I have put 2 layers of E Dead (like Dynamat) throughout the entire floor of the cargo area. It helped a bit, but not enough. I haven't done the hatch yet. Maybe I should do that next.
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Old 03-19-2009, 02:20 PM   #2
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http://www.jegs.com/webapp/wcs/store...-1&showValue=1
Maybe replace the current muffler with one oth these.
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Old 03-19-2009, 02:22 PM   #3
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I'm also wondering if going to a smaller pipe diameter on the axle back like the Maddad whisper is the key to killing drone?
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Old 03-19-2009, 02:23 PM   #4
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BTW, I'm not intentionally post whoring. It seems our firewall is somehow limiting the amount of characters we can post. It I post too much, I get "page cannot be displayed".
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Old 03-19-2009, 02:28 PM   #5
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go back to stock, or stop crying
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Old 03-19-2009, 02:37 PM   #6
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whats erz? is that like a ebay muffler?
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Old 03-19-2009, 02:39 PM   #7
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Quote:
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whats erz? is that like a ebay muffler?
Yeah. It's actually a really nice quality exhaust for Ebay.
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Old 03-19-2009, 03:12 PM   #8
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Old 03-19-2009, 03:41 PM   #9
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Old 03-19-2009, 04:49 PM   #10
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LOL. Ken, have you seen my sig lately?
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Old 03-19-2009, 04:52 PM   #11
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Quote:
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Seconded.

But seriously, does your exhaust have a resonator?
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Old 03-19-2009, 04:59 PM   #12
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invest in a quieter muffler. like a greddy evo2. Ive ridden in some loud cars... C-grunt had a really loud one that was kinda annoying on the highway. I think that might have been an ebay one too. Then he got a blitz... ohh those are loud too. Now he has something i ferget what it is, but its 100% better.
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Old 03-19-2009, 05:06 PM   #13
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MadDad FTW. I especially like the twin tip on the wagon.
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Old 03-19-2009, 05:10 PM   #14
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Quote:
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Seconded.

But seriously, does your exhaust have a resonator?
It does have a resonator.
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Old 03-19-2009, 05:11 PM   #15
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MadDad FTW. I especially like the twin tip on the wagon.
I like it too, but it's a 2.5", right?
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Old 03-19-2009, 05:58 PM   #16
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cobb is pretty damn quite too.
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Old 03-19-2009, 06:10 PM   #17
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I had an Invidia race catback and it was super loud inside the car. I switched to the Greddy EVO2 and have no complaints now.
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Old 03-19-2009, 06:40 PM   #18
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Quote:
Originally Posted by SaabaruMike View Post
I like it too, but it's a 2.5", right?
The MadDad Whisper comes in both 3" and 2.5". That goes for both the single and double tip also. http://www.daddysscp.com/dcart4/prod...8&cat=3&page=1 These things are hand welded in the US and sound awesome. They were real popular back in MA since that's where Daddy's is located. I actually know Rich the owner and have helped him with some product development ideas.

I should be rockin' on his new Ultra Basic boost gauges soon.
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Old 03-19-2009, 10:12 PM   #19
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I agree on the maddad. great sound, much quieter and the twin tip looks great.
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Old 03-20-2009, 01:53 AM   #20
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It's nice, but I'd rather live with the drone than pay for another exhaust. It seems like the key to a low drone exhaust is to either go dual tip like the Maddad or find a muffler with a really big canister like the Greddy EVO 2. I think I may look at Magnaflow for a muffler that is close to the ones in the exhausts mentioned above. I'm not in a big hurry on this. I'm just getting some ideas. My silencer kills most of the drone, but it abruptly drops to 2 1/4". I may play around with a 3" silencer pipe to kill off the megaphone effect of the fart can, or even play with a resonated tip before I do anything drastic. Thanks for all the input.
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Old 03-20-2009, 11:17 AM   #21
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Quote:
Originally Posted by racingfish View Post
cobb is pretty damn quite too.
haha Tell my neighbors that... and the woman.... she claims the noise in the back seat is 3x the front...

(Then again, I did gut my trunk....)
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Old 03-20-2009, 02:54 PM   #22
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You could try adding some ensolite (sp?) on top of the dynamat. That helped a bit in my swap.

That reminds me I need to do that to the FXT and STi...
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Old 03-21-2009, 05:24 PM   #23
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i thought dynamat was used for rattles not sound deadining.
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Old 03-23-2009, 08:18 AM   #24
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I usually kill my drones with stinger missiles.




Quote:
Originally Posted by racingfish View Post
i thought dynamat was used for rattles not sound deadining.
Basically, it's not really good at actually stopping sound.

dynamat is designed to increase the mass of the object that you put it on to change the resonant frequency of that object. By increasing the mass of the metal, less sound is transferred, but that's more effective on higher frequencies.

That exhaust drone is probably down in the 100-200 hz range, low enough that it will still decently transfer through the dynamat-ed metal and is omni-directional.

Droning comes from the design of the muffler, unfortunately on that canister style of muffler, most designs employ a "blow through" in which you can pass a golf ball through. The highers series flowmasters work very well because they actually use baffles in the muffler to cancel out the unwanted frequencies.



I wouldn't be surprised that's why they went with the muffler they did on the newer cars.

Last edited by bobturismo; 03-23-2009 at 08:29 AM.
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