Well Ive got some pipe and flat stock kickin around and figured I would give making my own muffler a try. Im looking to quiet my 3" duals down and fit in the confines of stock tail pipe area. It would be an oval with a offset in center out. does anyone have pics of the internal workings of some of the better off the shelf brand mufflers? Im lookin to make something with the sound between chambered mufflers and a hooker. right now my car sounds great its just WAY to loud.

 

This would be pretty easy to make but how does it sound?

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This would be ALOT harder to repoduce but I think it could be done or at least something similar

 

And theres always flowmaster.

 

well I guess I did all my own research but im still up for any other ideas. this corsa design is def one of my favorites but I need it to be offset in and center out and the design doesnt really offer an easy solution, you would have to comprimise on sound cancelation which kinda defeats the purpose.

 

Does anyone know if you can use regular fiberglass any parts stores for the insulation? Ive settled on a design that I really and will be making it this weekend stay tuned for pics and maybe if im lucky a video clip!

 

afaik it's the same kind of fiberglass, however I've never torn one open.

 

cool thanks, I was figuring it was the same type or at least a type that would work for what I want to do.

 

since im really tight for room and have enough pipe diameter to go with some thing like the warlock design I came up with this its just a wire frame since im stuck at work and all we have in AutoCAD LT. hope you can see how its supose to work, if not basicly is goes in the blue pipe to a open cavity at the end of the muffler then gets deflected up through the red one which will be perferated with fiberglass around the outside of the pipe. from the red one out to the open space befrore heading down the green one. The muffler length not including the extra on the in and out is only 11" the red pipe is 5". Anyone think im nuts? I know some ppl will say im choking it but dont forget that its a dual 3" setup and im trying to quiet it down. also this is essentially the same design as the warlock.

 

Let us know how it worked out!

I'm thinking of fabbing a true dual setup myself.

--97T--

 

Wow I thought there would be more ppl that would be interested in this. O well
After about 8 hours of welding, cutting, grinding I finally have them on! woohoo they sound sooo much better than the chambered powersticks, and they weigh less! Ill be posting a video tomorrow. Ill also post the link to the vid I have of how it sounded before with the powersticks. All in all I spent out of pocket $5 for some flat steel, the 3" piping I had left over from my Dual build along with the 3"id to 3"id connectors.

 

Ok heres the vid of the dual chambered mufflers in the place of the tail pipes.
Video - Stock bottom end LT1 with LE3 heads and LE2 cam LT's and 3" true duals with H-pipe and Short chambered mufflers DAMN ITS TO LOUD FOR THE STREET!

Heres my custom muffers shown above in the AutoCAD drawing.
Video - LE3 heads LE2 Cam, Stock bottom end, long tubes w/ 3" duals and H-pipe through custom mufflers

listen to them at the same volume and you can hear the difference, My custom mufflers are still kickass at idle but sound much deeper at higher RPM's, After driving it around all day the car feels the same as it did before but I can actually hear the radio!! woohhoooo and it only cost me 6 bucks! anyway what do you guys think? good/bad?

 

well first of all I think your car sounds damn mean both ways.. and I love how quickly it accelerates and deaccelerates!

your custom mufflers are definatly quieter and deeper on the throttle.. but deeper tones have a longer wave frequency, therefore the sound will eminate for a longer distance.

I say keep the custom mufflers, at least you can hear the radio! I too am now looking at alternative exhaust options cause I can't hear a damn thing.

 

ya its really hard to tell Db levels from the video since the camera will only record up to a certain level. but ill tell you standing behind the car under throttle with the chambered mufflers peirce your ears!

 

heres a pic of the passenger side, my welding isnt the best but its def not the worst!

 

so you've got a L98 350 with LT1 heads and cam?? It accelerates very quickly.. I love it!

 

No, its an LT1 from a 97 Z28 thats been massaged with heads and a cam from Lloyd Elloit

 

Very cool! I love the sound, any pics from the construction process?

 

thanks, No I dont have any in progress pics I should have taken some but o well

 

I agree. With the ground clearance our cars have, you would think more people would be interested in different ideas regarding true duals. I have thought of building my own muffler (low profile) that would fit under the car, however, I never thought about the location that you chose (similar location to the Corvette). I think you have a great idea here, and imo, you did a fantastic job creating a nice looking, great sounding muffler. Cool.

 

Thanks man, I know after doing the duals I cant believe more ppl arent doin it. its fairly easy and its something most muffler shops could do as long as you had pictures showing it. The only part of my system that required modification was the crossmember. As far as ground clearance I dont notice mine being any lower than my old system. overall I wouldnt think twice about doin duals on another third and my muffler should perform pretty well, I looked at ALOT of different designs and locations from both the mustangs and the vettes, I like the overall sound but it is still very loud, I wont get a ticket but its still loud. I may lengthen the next mufflers I build from 11" to 14" and add more fiberglass maybe add more reliefs for phase cancellation and maybe even work on some formulas to cancel specific frequencies. but that wont be for a while.....

 

im not much of a fabricator myself but i really like the design of the corsa power pulse muffler and i am now looking to buy one for my new exaust set up. i want hedman lt's into a 3 1/2" y pipe with a corsa muffler in the stock location with single out on the drivers side.

- has anybody ever done this before?

 

Have you been able to find a place that sells the muffler by itself? If so, where? I've been looking.

Tricked Out- Thats sounds pretty mean! I'm sure the sound clips don't do it justice.

 

i was going to contact corsa by phone and ive seen a couple on ebay

 

Ya I love that design, but without some pretty extensive frequency research I had no idea what frequencies I would be canceling out or how big to make the gaps that collect the sound waves. for the next mufflers I have another Idea which will use the corsa phase cancelation design but ill incorporate it into an offset in center out muffler. but this is going to take ALOT more research and prolly wont happen till next year. Let us know if they sell just the mufflers, I was under the impression they only sold them with full catback systems.

 

When I listened to the first video, I thoughth it vsounded pretty nice. But of course, video rarely gives true sound quality/level.

On the system you made, it was definately a deper tone, and sounds better, from what I can tell.

One thing though, from the pics, I couldn't see a hanger for the muffler. Maybe just the angle of the shot. If there isn't a hanger ON the muffler, I would be afraid the weight of the muffler would eventually break the welds from leverage.

 

I like the idea and thought of that myself


but dood you still have a stock style baffled style muffer. that's not performance


though I am curious as to howlong the fiberglass holds up

did you use perf or louvered core on your muffers?



EDIT: just want to say haven't actually heard the clip yet I'm at work
so will report back later

 

That muffler setup looks real familiar

Fiberglass insulation will start to melt around 950°.. probably won't see those temps at the rear of the pipe where the mufflers are.

Over a year use on my camaro and, aside from soot, the insulation was just fine. Muffler mounted in place of the converter.

 

I ride a Buell with a Jardine slip on and I have been trying to figure out a way to make a lot quieter without sacrificing power. Here is my findings:

Fiberglass packing is good for 5k at most. The heat and corrosive effects of the exhaust along with the positive/negative pressure of the exhaust kills the packing.

So instead of just buying the typical fiberglass repack kit (for motorcycle exhaust cannisters) I decided to make my own packing. I first picked up some kiln lining. It is a ceramic blanket that is similar in construction to the fiberglass blanket. I stuff the exhaust can full and rode for a few thousand miles then tore it down. i found that all of the contents were gone. So I went back to the drawing board and found that Borla offers a 1 million mile warranty on some of their stainless cans.
I looked their design over and found my error. They use the same type of kiln lining but also use Stainless Steel Wool to wrap the perforated core the wrap it with the "thermal blanket". The reason for this is that the stainless wool will hold up to the heat and does not corrode.

So I ordered a roll ( a BIG roll) of the stainless wool for me to use. I then tightly wrapped the perforated core with the stainless wool. Then wrapped the core with the thermal blanket. I installed the exhaust can and started it up............I as amazed. In the past I could not make a phone call while being within 25 feet of my bike while at idle, it was just too loud. Now I could hold a conversation on the phone while sitting on my bike with it running at idle.

I will go on to say this. The thermal blanket IMO does not do much in the way of muting the sound. I attribute this to the ss wool. If I were to build a muffler I would use the stainless wool around the perforated portions of the pipe and I think it would be great.

One last thing. If you decide to buy any stainless wool make sure it is STAINLESS. Regular steel wool will burn and in the by scouts they are even taught to start a fire with flint and regular steel wool. Also buy the coarsest stainless wool available for durability.

 

speedfreak, thats some excellent information! I never even though about anything other than fiberglass. Now you got my mind spinning again lol just when I thought I was happy with my mufflers!

Hey deadbird, I didnt know you made similar mufflers, the last time I saw your setup you were still using a straight through design. do you have any specs on yours? Or are you refering to how I routed the piping? If so then yup very much like yours I think you and willie are one of the first guys on here that did duals and your the only one I remember that did it by going over each side rather than bringing the pipes to the pass side. Anyway it was your pics that first got my head spinning on my system last year so THANKS! btw do you have any sound clips?

 

I was referring to layout. My original and current design muffler is straight through. I'll be changing that yet again.
Current design looks almost stock...
http://www.deadbird.org/swin/uploads/exh009.jpg

Car sounds real good.

I had a clip of my original singles awhile back but, lost it when my webhost servers crashed.
Unfortunatly, it will be quite sometime before the engine makes noise to record again.

 

What do you think you will end up making next? I like you current setup with the muffler in the stock location, looks real clean. I think mine may be to restrictive, I havent been able to get to the track yet but ill be pulling these mufflers off and running the old chambered one and see how much im leavin on the table. with the mufflers so far back do you think ill see much power lose?

 

The diy muffler v3.0 will probably look similar to the current as far as outside appearance. It will probably be somewhat taller to allow for more dampening material though. The design will be kind of a mix between a turbo muffler and a chambered muffler. The pipe will enter and exit on the same side, sort of a corvette-ish muffler style only, not.. lol.
Mainly I'm just looking for a little more reduction in noise.

With the mufflers at the rear, 3" pipes and, if you have some form of x-over (h or x pipe), I can't imagine your choking off much of anything.