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Old 06-10-2019, 11:31 PM
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Need help with mufflers

Hello on my coupe I had fake flowmasters 40
They had a drone bad I went 100 miles and I had a headache so bad and it lasted all day tell the next am so when I drove home I wore ear plugs so this weekend I went to the wrecking yard and got a pair of muffles off of a 07 Hyundai sonata I got a pair and pulled off the flow masters and just me firing it up and giving it gas it sounds louder and now I have the school bus popping my mufflers are half way back before the axel.

My question is I dont want to cut and weld the old mufflers can I just cut out the pipe after the sonata muffles and put In the fake flow masters.

Would it take away the drone with the other muffler before the fake flow masters ?

And would it quite it down ?

If not itís not worth the hassle crawling under the car.
I donít have a lift.
Thank you kelly I

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Old 06-11-2019, 07:41 AM
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Hate the drone sound while traveling. For that reason I went with larger, quieter mufflers. At idle hardly any sound and at speeds just the wind noise. Will bark a bit if I get on it, guess I'm over loud and it sounds like you are too. Invest in a set of quieter mufflers and enjoy the ride.
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Old 06-11-2019, 07:49 AM
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My car has two sets of mufflers in series. I have chambered mufflers after the collectors and a pair of glasspacks before the tailpipes. The second set of mufflers kills most of the drone. I still have a couple of speeds and RPMs where you can hear it. I also extended my tailpipes a bit which helped. Good luck.

By the way, 38 Chevy town sedan with 350 and 700r4. 3.07 rear end.
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Old 06-11-2019, 08:01 AM
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Can't answer your question, but I have Dyno Max super turbo mufflers. They seem to be a good compromise. I don't know if they still do it, but they did have a "sound warranty", if you don't like them, send them back! I first got the shorter of the two sizes and didn't like it. Told cust service at Summit I wanted to return them because I didn't like the sound and they were like What??? She checked the warranty and let me return them. The larger ones I still didn't like at first but I got used to them. People tell me my car is a real sleeper with those mufflers so I take it they sound fairly quiet outside of the car also.
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Old 06-11-2019, 10:36 AM
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My 38 has no sound deadener or interior yet I wanted to drive it this year
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Old 06-11-2019, 10:37 AM
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Eventually I’m going to get good mufflers but as of right now it’s not in the budget
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Old 06-11-2019, 12:02 PM
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Quote:
Originally Posted by 38 old coupe View Post
My 38 has no sound deadener or interior yet I wanted to drive it this year
Mufflers aren't going to matter much in this case....you are driving around in a large Bass drum.

Stripped out Race cars are the same way.

If nothing more this year, at least cover the inside with a Dynamat type peel and stick deadener. Fatmat, Killmat, whatever you can get a deal on...Amazon has some real good prices.
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Old 06-11-2019, 12:59 PM
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Thank you Eric I figured a lot was from no sound deadener
I’ve been looking at fatmat mega mat.
But not sure how good it is
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Old 06-11-2019, 01:00 PM
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So this year ear plugs
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Old 06-11-2019, 01:23 PM
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If you want to see if something will work in the meantime you can always get some of this stuff at a home improvement store. Just looking to add mass to dissipate vibrations.
https://www.lowes.com/pd/Vycor-9-in-...ashing/3027049
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Old 06-11-2019, 02:32 PM
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Quote:
Originally Posted by silver74vette View Post
If you want to see if something will work in the meantime you can always get some of this stuff at a home improvement store. Just looking to add mass to dissipate vibrations.
https://www.lowes.com/pd/Vycor-9-in-...ashing/3027049
Better idea and won't smell like the other and insulates against heat. https://www.lowes.com/pd/peel-seal-i...AaAgmFEALw_wcB HUGE article! https://www.jalopyjournal.com/forum/...terial.711889/

Last edited by JeffB28; 06-11-2019 at 02:43 PM.
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Old 06-11-2019, 02:39 PM
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I've heard this stuff works well for something you can buy from Lowes/Home Depot....just don't use it on the underside of a roof is what I've heard, heat will make it come loose.(but that seems to be more of a southern problem than the materials fault).
https://www.lowes.com/pd/Peel-Seal-I...ashing/1018733

There is a long sound deadener thread here at Hotrodders if you search for it, full of ideas. "Lizard Skin" thread is another.
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Old 06-12-2019, 09:59 AM
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If theirs any smell my wife will complain about it sheís has a super nose and I put the flow masters on after the other mufflers last night about 10Ē back right before it goes over the rear axel it sounds quieter but I will know more after work today it was 10 pm when I finished last night so I couldnít make much noise.
Iíve heard the peel and seal has a tar smell and someone mentioned duct work brutal rubber based stuff from the lumber stores
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Old 06-12-2019, 11:30 AM
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If you read the Jalopy Journal thread about Peel & Seal it seems that the "smell" issue is more propaganda from the expensive 'mat sellers than any real issue. got a few hundred rodders saying it doesn't smell.

It is a butyl rubber asphalt mix, I'd guess the butyl rubber helps encapsulate the asphalt and prevent 90% of any potential smell.

if I wasn't lucky enough to have lucked into 6 boxes of genuine Ford Motor Company foil backed sound mat(5.5" x 18", 72 per box.) I'd be trying out the Peel & Seal.
I'll still go for using Peel & Seal in the Vege race car, rather than waste the prime stuff.
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Old 06-13-2019, 10:20 AM
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Also, do you have an "H" pipe, or "X" pipe in your exhaust system? This will typically even out exhaust pulses, potentially diminishing the drone.
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