So is this trumpeting, something else?
3/7/10 | 09:30 AM
#22
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From: Florida
So I swapped out the flowmasters back to the stockers yesterday and the sound is gone.
MUCH quieter (too quiet and tame) but the crummy sounding rattle and the rest of the racket is gone so it was definitely an issue with the flows. Guess they can't handle the 1.75 longtubes and intake!
Now I just have to decide whatto replacetheflows with to het back the nice rumble
MUCH quieter (too quiet and tame) but the crummy sounding rattle and the rest of the racket is gone so it was definitely an issue with the flows. Guess they can't handle the 1.75 longtubes and intake!
Now I just have to decide whatto replacetheflows with to het back the nice rumble
3/8/10 | 09:37 AM
#23
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Joined: March 27, 2008
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From: Omaha, NE
The second video fairly accurately diagnoses your issue. If a rattle of two tubes where actually the cause of your noise you'd hear it better the closer you get to where those pipes are (in the engine bay). However the noise you're getting is most certainly coming from the tail-pipes.
In this instance your chambered flowmaster mufflers are the cause of your raspy cackling noise.
Chambered mufflers sound cool when they can adequately dampen noise. They do so by bouncing sound waves in specific patterns to double some frequencies while eliminating others through the use of diffusion.
However your mufflers can no longer adequately deal with the exhaust flow of your setup. Likely what is causing that cackle is the baffles within the mufflers themself.
To cure this noise (some actually like it) you're going to need to do a muffler change. If you like the old school rumbly sound I would go with a hybrid chambered/packed muffler like a Bassani. The straight through designed mufflers that use sound absorping materials will certainly sound different. They won't sound anything like your flowmasters but they'll likely reduce or eliminate the cackle you have now.
In this instance your chambered flowmaster mufflers are the cause of your raspy cackling noise.
Chambered mufflers sound cool when they can adequately dampen noise. They do so by bouncing sound waves in specific patterns to double some frequencies while eliminating others through the use of diffusion.
However your mufflers can no longer adequately deal with the exhaust flow of your setup. Likely what is causing that cackle is the baffles within the mufflers themself.
To cure this noise (some actually like it) you're going to need to do a muffler change. If you like the old school rumbly sound I would go with a hybrid chambered/packed muffler like a Bassani. The straight through designed mufflers that use sound absorping materials will certainly sound different. They won't sound anything like your flowmasters but they'll likely reduce or eliminate the cackle you have now.
3/8/10 | 03:49 PM
#24
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Joined: January 9, 2005
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From: New Carlisle, Ohio (20 miles north of Dayton)
I also agree with you. His choice of mufflers to correct what he doesn't like is very limited. Trust me I've been there like hundreds or most likely thousands before him. This is nothing new. Been going on for 5 years now. Just like life...mufflers for the 05-10 stang are a compromise. It will be interesting to see what his choice is. But one way or another it will take a chambered muffler to fix his problem.
3/8/10 | 04:09 PM
#25
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Joined: July 26, 2007
Posts: 1,087
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From: Oregon
Fought the same battle and after hearing Scott's car I decided to go Magnaflow also.
Scott got ur msg, but was sleeping ( had to work). Mufflers wont be here till Wednesday, TC should be here today.
Scott got ur msg, but was sleeping ( had to work). Mufflers wont be here till Wednesday, TC should be here today.
3/8/10 | 04:24 PM
#26
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Joined: January 9, 2005
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From: New Carlisle, Ohio (20 miles north of Dayton)
That's why I didn't call again. I know our schedules are at both ends of the candle. I am really wanting to hear your opinion of the Maggie's.
Your in the same boat as the OP'er! Remember...they will be quieter straight out of the box than in a few hundred miles!!
Last edited by 70MACH1OWNER; 3/8/10 at 04:26 PM.
3/10/10 | 02:31 PM
#30
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From: Florida
Flows definitely sounded bad. But since I removed them, the sound is gone. Doesn't that indicate that the rattling problem was the flows themselves and not something else? If so, the flows are the problem and are gone now so I don't need a muffler to fix thee problem since the problem was the flows and they are gone. Also, someone said I would need chambered mufflers to fix the problem, but the problem was the flows and they were chambered. So why would I need chambered?
3/10/10 | 02:45 PM
#31
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Joined: January 9, 2005
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From: New Carlisle, Ohio (20 miles north of Dayton)
Flows definitely sounded bad. But since I removed them, the sound is gone. Doesn't that indicate that the rattling problem was the flows themselves and not something else? If so, the flows are the problem and are gone now so I don't need a muffler to fix thee problem since the problem was the flows and they are gone. Also, someone said I would need chambered mufflers to fix the problem, but the problem was the flows and they were chambered. So why would I need chambered?
3/11/10 | 11:15 AM
#32
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From: Omaha, NE
weird you're having such a 'cackling' problem since you have high flow cats. only option i would try is either a pro-chamber or resonators. you could pick up an o/r prochamber for long tubes at a reasonable price. that will help.
3/11/10 | 12:16 PM
#34
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From: Omaha, NE
3/11/10 | 01:08 PM
#35
I love "Cackle"...but I hear some high pitched "squeeling" in the back pressure when you let off...that sounds like it would get annoying fast.
3/12/10 | 07:33 PM
#36
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Joined: January 9, 2005
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From: New Carlisle, Ohio (20 miles north of Dayton)
Hey Colby,
I know your doing the install of the Maggies as I type this. I want to hear your impressions!!
I'm hoping it's a bunch!!
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