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Old Jun 15, 2004 | 01:03 AM
  #1  
Gumby's Avatar
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From: NWOhioToledoArea
Car: 86-FireBird
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Transmission: T5
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Muffler guts

Note that the pic is what my muffler would look like from the top down. Just a regular stock type muffler.

Can anyone give me and idea of what the insides might be shaped like??? I am gonna cut a hole into it and gut it for free flow.


I would like to only cut the hole as big as needed. rather then cutting the whole bottom out. And yea that the other reason.

I am doing it from the bottom and want it less obvious then a big 12x24in square cut n re-welded in.
Attached Thumbnails Muffler guts-mufflerguts.jpg  
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Old Jun 15, 2004 | 04:13 PM
  #2  
hot86z-28's Avatar
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From: Newark, OH
Car: 1992 Camaro RS
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i dont really know about your specific question but i wouldn't recommend taking everything out, ie "gutting" it. it will create TONS of turbulence and in essence restrict the power of the car, all the air will be swirling around without a set exit. so not a very good idea.
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Old Jun 15, 2004 | 07:01 PM
  #3  
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From: Glen Allen, VA
Why not just remove the entire muffler or the entire exhaust from the cat back, or get a cutout. A lot better options that gutting a muffler.
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Old Jun 15, 2004 | 07:10 PM
  #4  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Maybe he lives in one of those places you can't do jack **** to the exhaust (btw.. you have the in/out backwards) ?
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Old Jun 15, 2004 | 07:29 PM
  #5  
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From: Glen Allen, VA
maybe, but I didn't think Ohia was very strict. I ran for a while with no exhaust at all after the cat on my 305 and it wasn't too loud. I wouldn't espect it to be bad at all on a v6.
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Old Jun 15, 2004 | 08:02 PM
  #6  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
I don't know either. Some places are worse than others. AFIK, it's up to the individual city to make the laws from bad to wrose about that stuff.
From my exp. with a v6 and louder than stock mufflers.. they sound absoultely awful. No muffler on them is just... well... I'll just say 'yuck' to be nice.
Here is one I made in spare time for a friend... while an improvement over a flowmaster.. it still leaves much to be desired in the sound dept. (may sound pretty good on a v8 though..)....
Attached Thumbnails Muffler guts-post-6-1084247268.jpg  
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Old Jun 15, 2004 | 10:07 PM
  #7  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
My car ran very well but it got louder n louder. I tracked down several exhaust leaks and fixed each one. The last one being the flange clamp near where the cat would be. [I have no cat] But now that every hole is sealed up the car feels a bit restrictive. It runs fine but doesn't rev as freely.

I would assume rust n crap form the bad spots got into the muffler. I did consider taking it down and replacing it with a free flow glass pack but I would lose my dual tips / it owuld be a whole bunch of work to keep the dual tips on either side.

A new cat back aint gonna happen. Most of the leaks I fixed were in that area and its all new pipe now.

I just thought it would make it the easiest if I cut open the muffler and made it flow free.

I can get a similar muffler for $35 new but don't want it. I don't feel like spending $100 on some name brand muffler either.

My first option was a 9.99 cherry bomb and an adapter but keeping dual tips would be so hard.

I might be able to have dual tips but have them both in the center???



I could just drill a few hole in the exhaust pipe near the muffler and make it leak a little like before. That flang leak was the one driving me nuts as it was almost impossiable to see, loud as heck and was choking me out when the windows were down.
Attached Thumbnails Muffler guts-p1010058.jpg  

Last edited by Gumby; Jun 15, 2004 at 10:10 PM.
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Old Jun 16, 2004 | 08:10 PM
  #8  
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you do realize to get better preformance out of a single out instead of the fake duals? i'd go with the pack idea myself. as for the cracks, its nothing a MIG or TIG can't handle.
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Old Jun 16, 2004 | 11:53 PM
  #9  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Originally posted by 2out_The_Left
you do realize to get better preformance out of a single out instead of the fake duals? i'd go with the pack idea myself. as for the cracks, its nothing a MIG or TIG can't handle.
Yea I know the fake duals odd but they are all like that. And the car does look ice with the duals outlets on each side.

Why with the single free flow glass pack I was gonna dup the dual bit but in the center of the car ad short as possible to not route it far or screw up flow to much. Just split it into 4.. The dual part would only be about 12 inches maybe. Use one old chrome dual tip as a splitter with two more dual tips on it???
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Old Jun 17, 2004 | 08:01 PM
  #10  
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From: The BayState-MA-
id make a Y out the rear from the single out and have 2 out the left i think 2 pipes out the left looks nice and its not too common either. better performance also
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Old Jun 17, 2004 | 09:55 PM
  #11  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Originally posted by 2out_The_Left
id make a Y out the rear from the single out and have 2 out the left i think 2 pipes out the left looks nice and its not too common either. better performance also
That would probably be easier. But I did hit a snag kind of. I can go get a $9.99 cherry bomb anywhere. But I would love to be able to find a original Thrush glass pack just for kicks. But even on ebay they are $30.

should only be about $30 shipped. I know there isn't much difference but Thrush glass packs were always cool.
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Old Jun 17, 2004 | 11:23 PM
  #12  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Thrush is made by Dynomax (Walker) which Summit and JEGs both carry under the 'Magnum' glasspack name which is a 'cherry bomb'.
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Old Jun 18, 2004 | 10:16 PM
  #13  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Originally posted by deadbird
Thrush is made by Dynomax (Walker) which Summit and JEGs both carry under the 'Magnum' glasspack name which is a 'cherry bomb'.
Oh yea? Wasn't sum thrush glass packs blue though???

Though the stick you get in the Thrush box is much better. Maybe $15 better
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Old Jun 20, 2004 | 04:51 PM
  #14  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Well I went with the single exhaust tip. But went out the side. I think it looks much better than 1 single on the back. Makes it a tad sleeker. The sound is just awesome, very deep n throaty.
Went with the cheap cherry bomb. Welded everything then sealed the welds with JBweld. Just to seal any pin holes.
Attached Thumbnails Muffler guts-1010092.jpg  
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Old Jun 20, 2004 | 04:53 PM
  #15  
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From: NWOhioToledoArea
Car: 86-FireBird
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Transmission: T5
Axle/Gears: 3:42
.....
Attached Thumbnails Muffler guts-1010087.jpg  
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Old Jun 21, 2004 | 01:44 AM
  #16  
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Car: traded away 94 v6
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If you're willing to pay for shipping, I have a basically new muffler that you can have, you'll just need to get your tips welded on. It was on my 4th gen when it had the 3.4L, sounded good IMO, but then I got overzealous and cut the cat off, was waaayyy louder at idle but popped and sounded like **** at anything higher than idle.

Up to you, if not I'll just let it keep taking up space in the garage.
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Old Jun 24, 2004 | 09:02 PM
  #17  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Originally posted by Xhiron
If you're willing to pay for shipping, I have a basically new muffler that you can have, you'll just need to get your tips welded on. It was on my 4th gen when it had the 3.4L, sounded good IMO, but then I got overzealous and cut the cat off, was waaayyy louder at idle but popped and sounded like **** at anything higher than idle.

Up to you, if not I'll just let it keep taking up space in the garage.
Oh sure now you tell me

Its a little to late. Everyting is welded up for years worth of work. And I like it much better this way. No more winey V6 sound. No more exhaust tips to scrape on steep grade drive ways.

Its all deep bass V8 tones.

And while I pass slow people in the left lane, in the right lane.
My left side single straight shot exhaust rattles their windows well.

Its super nice. The onlything more like a V8 is a 6 with open headers. That sounds wicked.
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Old Jun 24, 2004 | 11:38 PM
  #18  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Originally posted by Gumby
The only thing more like a V8 is a 6 with open headers.
While I do like the side exit you did, I'm going to have to disagree with the above statement.... v6 + open header (no manifold) = awful sound & noise.

Yes I do know and I'd almost wadge that my bud with the v6 would (almost) agree it sounded horrid.
He used the stainless PF&E headers and I don't know if it's those or what but, they have an awful tone to them...

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Old Jun 25, 2004 | 02:13 AM
  #19  
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From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
http://s11.yousendit.com/d.aspx?id=9...4DC80206DCC1F9


he is a wmv recently posted of a v6 with open headers.

He has another one where it sounds pretty neat as he pull on a Z06 .
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