Muffler Wraps

DMAX Daddy · April 15, 2004

I finished my "rip out everything and apply Dynamat" project to the Suburban and it quieted the muffler and road noise down a lot.

Now I am looking for a wrap to put around the muffler to reduce the last little bit of noise inside the cab from it.

Has anyone had any type of wrap before that can be subjected to the elements? Ive seen a few at Summit and Jegs, I just dont think they have what I want.

History:

I put on the Corsa Exhaust, and I like it, but its a bit loud for my wife sitting in the third row seat with the newborn. Dynamat was step one I was doing anyway to reduce the Suburban "echo". Just looking now at something else to help tone it down. At this point its about the same volume inside as stock, just going for whisper quiet.

99GMCZ71 · April 15, 2004

A heatshield on the muffler will help some. I've had a similar situation when I installed my Magnaflow exhaust. Way to much drone in the cab, I'm actually changing the whole exhaust to a flowmaster Force II with the resonator and 70 series muffler. If anybody is interested in a almost brand new magnaflow exhaust part# 15754 let me know. The Magnaflow sounds awesome, just to loud for my tastes in the cab. It has to be the best fitting, nicest looking cat-back kit I have seen! Just a little to loud for me.

LikeaRock14 · April 15, 2004

A heatshield on the muffler will help some. I've had a similar situation when I installed my Magnaflow exhaust. Way to much drone in the cab, I'm actually changing the whole exhaust to a flowmaster Force II with the resonator and 70 series muffler. If anybody is interested in a almost brand new magnaflow exhaust part# 15754 let me know. The Magnaflow sounds awesome, just to loud for my tastes in the cab. It has to be the best fitting, nicest looking cat-back kit I have seen! Just a little to loud for me.

I'm TOTALLY on that one. Heat shields help gaurd the resonance a lot, all of Flowmaster's kits come with one. and 99, cut that d**n rsonator out and install a piece of pipe there when you get the kit! The 70 series has minimal interior sound, literally, even with my 7.4, and it will make a a tad bit too mellow for you I'd have to say. If ya want it quiet, I'd say go ahead and keep it, but without the resonator it'll prolly make you happier.

Thst's another thing too, actually. You could have a local shop install a resonator before the muffler. Magnaflow makes them, Flowmaster has them, I think that's it. Even a 4" round Magnaflow muffler before the Corsa muffler would help quiet i down some, acts just like a resonator. but I thought Corsa was supposed to be

a "whisper quiet" cruise???

99GMCZ71 · April 15, 2004

I thought about having a resonator installed, but decided not to cut up the magnaflow pipe. The way the magnaflow front pipe is bent at several angles, not sure if i could get the resonator in there. So I would probably have to get a different front pipe. I was really impressed with flowmaster tech support. The guy i talked to was trying to figure out away to keep the magnaflow and add a small resonator to what i have. I'm sure it could be done, i just decided to sell the magnaflow and go with the flowmaster. Plus the flowmaster guy said the drone is a problem with the 4.8 and 5.3 motors. He has had a lot of complaints and that is why they added the resonator to their system. You can also get the american thunder cat-back kit that has the 30 series muffler. He said that one is quite a bit louder that the 70 series kit.

Wingnut · April 15, 2004

I bought a hood liner ror sound absorbtion that worked great, until it hit that pole...But I don't think that was the hoodliners fault. It performed it's function.

Just a thought, but have you considered a spray-on type sound absorbant material? I know Dynamat, and a few others make it. I have never used it, but I have heard (puns always intended) that it does great...AND you can put it on as thick as you want. I don't know how durable it would be with the elements though, that's something you might have to take up with them directly.

GM GIMP · April 16, 2004

I bought a hood liner ror sound absorbtion that worked great, until it hit that pole...But I don't think that was the hoodliners fault. It performed it's function.

Just a thought, but have you considered a spray-on type sound absorbant material? I know Dynamat, and a few others make it. I have never used it, but I have heard (puns always intended) that it does great...AND you can put it on as thick as you want. I don't know how durable it would be with the elements though, that's something you might have to take up with them directly.

Is the spray applied under the cab or inside the cab under the carpet?

I heard and I seen when I backed into that fireplug!

Wingnut · April 16, 2004

I don't know, I havn't used it, but was just throwing that out there.

I looked it up a couple of months ago for somebody in a thread and it looked like it would be quite a bit cheaper than the stick on stuff for covering large areas.

Do a search on: " Dynamat Dynashield Deadening Spray " on Google, and there will be quite a few places pop up with a litle more info.

Hmmm....This time searching, all I found was 10 oz cans of spray. Last time, I remember finding 3 and 5 gallon buckets for less than $100....But I didn't search too in depth either.

DMAX Daddy · April 16, 2004

I tried a can from a local stereo store on the outside bottom of the sheetmetal. It helped a little, but at like $19 a 10 oz can it would get way to expensive too fast.

I might try a big bucket and layer it on, or maybe even rhino line the underside and wheelwells. It all depends how silly I decide to get on it. Right now its fine, and no amount of sound proofing will quiet the sweet sound of the exhaust when I romp on it.

For the high horsepower diesels at work, we have insulating mats to wrap around the exhaust, and I tried an extra one that was laying around. It worked, but I do not think that particular type of mat would survive under a truck. Since it doesnt rain here much, that would prolong the life, but at $25 each it could get spendy.

TROYROBO · April 16, 2004

why put wife and newborn in rear?????????or you trying to get them out of earshot when they act up

DMAX Daddy · April 16, 2004

He he, actually the logistics work out better that way.

I yank out one of the center row buckets and use that for a "loading zone" for the wife, newborn and 3 yr old in inclement weather, and as a changing station.

The 3 year old gets her carseat in the other bucket, and Mom and baby get the third row so she can attend to him.

If we are going to be gone LONG way I toss the bucket I took out in the back and reinstall when we get there. For short day or weekend trips I leave it at home.

Rarely do both the wife and I sit up front with both kids in the back. As many of you know, something WILL go wrong if we try it!

Cracking the throttle hides screaming babies almost as well as the VOLUME knob on the radio, and isnt quite as obvious