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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 05-22-2006, 05:15 PM   #1 (permalink)
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Question Muffler?

I turned my 1984 325e on today and all of a sudden it sounds like a throaty Mustang V8! What gives? Ideas?
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Old 05-22-2006, 05:31 PM   #2 (permalink)
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Probably a hole in the muffler
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Old 05-22-2006, 06:04 PM   #3 (permalink)
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Or the engine fairy came by and dropped a 7 series motor in without you knowing... If that's the case, shoot him/her my way. My engine is tired!

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Old 05-22-2006, 09:13 PM   #4 (permalink)
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Haha..
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Old 05-22-2006, 09:21 PM   #5 (permalink)
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umm maybe your muffler just went bad and its kinda like a straight pipe now?
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Old 05-23-2006, 07:10 PM   #6 (permalink)
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Yeah, actually my bet is that the baffling inside the muffler has finally let go. It is usually wadded fiberglass (depending on brand, some don't use glass baffles at all) and the combination of moisture, heat, and pressure breaks them down. Brands like Magnaflow use multiple chambered mufflers in which the chambers themselves act as the baffle, which can last longer.

Just my .02

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Originally Posted by <b>superdeadman</b><br>Josh W. IS my hero!

Originally Posted by <b>JoeMadoo</b><br>325eXTATIC, you're my hero...
Originally Posted by <b>Moosepuck</b><br>Oh yeah... 325eXTATIC...you're my hero...
Originally Posted by <b>e30dream</b><br>325eXTATIC....youre my hero.
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Old 05-24-2006, 10:59 AM   #7 (permalink)
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mine sounded really loud when the exhaust FELL OFF from the resonator back.
It was AWESOME!! but, it was also getting louder and louder until it fell off.
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Old 05-24-2006, 11:07 AM   #8 (permalink)
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Originally Posted by 325eXTATIC
Brands like Magnaflow use multiple chambered mufflers in which the chambers themselves act as the baffle, which can last longer.
magnaflow uses a perforated core wrapped in packing, not baffles. i believe you're thinking of flowmaster.

a lot of decent brands will use ceramic or stainless packing in their stainless mufflers so that it will outlast the car.
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Old 05-24-2006, 01:42 PM   #9 (permalink)
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Quote:
Originally Posted by draculia
magnaflow uses a perforated core wrapped in packing, not baffles. i believe you're thinking of flowmaster.

a lot of decent brands will use ceramic or stainless packing in their stainless mufflers so that it will outlast the car.
Yeah, that's it! That's the ticket.

Josh W.
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Originally Posted by <b>superdeadman</b><br>Josh W. IS my hero!

Originally Posted by <b>JoeMadoo</b><br>325eXTATIC, you're my hero...
Originally Posted by <b>Moosepuck</b><br>Oh yeah... 325eXTATIC...you're my hero...
Originally Posted by <b>e30dream</b><br>325eXTATIC....youre my hero.
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Old 05-30-2006, 12:03 PM   #10 (permalink)
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Turns out that the muffler got detached from the pipe coming into it, rusted off. Can I go with any muffler or just a certain kind?
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Old 05-30-2006, 12:16 PM   #11 (permalink)
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Anything that will fit. Might be a good idea to go cat-back... That way the whole system will age together, and you won't have a NEW muffler on an OLD tailpipe.

Just my .02

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Quote:
Originally Posted by <b>superdeadman</b><br>Josh W. IS my hero!

Originally Posted by <b>JoeMadoo</b><br>325eXTATIC, you're my hero...
Originally Posted by <b>Moosepuck</b><br>Oh yeah... 325eXTATIC...you're my hero...
Originally Posted by <b>e30dream</b><br>325eXTATIC....youre my hero.
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Old 06-12-2006, 12:55 PM   #12 (permalink)
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Exclamation

Okay, so I'm buying the muffler today and there is the stock one for $140, an ANSI Free Flow one for $240, and a Bavarian Autosport Tri-Flo one for $800!

Is it worth the extra $100 bucks to go with the Free Flow?
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Old 06-13-2006, 11:36 AM   #13 (permalink)
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Anything that offers better breathing is likely to improve performance! Stock pipes are ALWAYS overly restrictive so that they can be super quiet. Quiet is "generally" the enemy of performance when it comes to exhaust, because quiet means restrictive. I say spend the extra and go for the free flow if it won't pinch your pocket too much!

Hope that helps!

Josh W.
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Not currently on the Bimmer kick. Drivin' a 2003 Silver Civic at the moment, but I am STILL the Founding Member of the "325eXTATIC You're my hero" club.
Quote:
Originally Posted by <b>superdeadman</b><br>Josh W. IS my hero!

Originally Posted by <b>JoeMadoo</b><br>325eXTATIC, you're my hero...
Originally Posted by <b>Moosepuck</b><br>Oh yeah... 325eXTATIC...you're my hero...
Originally Posted by <b>e30dream</b><br>325eXTATIC....youre my hero.
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