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Unread 12-23-2013, 02:28 PM   #1
underpowered
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Home Built Muffler?

anyone ever built their own muffler?

yes i do realize the cost effectiveness of this is terrible considering the numerous muffler options and relatively low cost of many of them. i want it more the the novelty than anything else really. That, and i am building the entire rest of the exhaust myself including the headers, so why not the mufflers as well.

thoughts, opinions, any input at all?

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Unread 12-23-2013, 04:06 PM   #2
AtTheHelm
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Sounds like a fun project to me. Getting the chambers right might be hit or miss.
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Unread 12-23-2013, 04:56 PM   #3
BESRK
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I would look for a dissected Flowmaster (or something similar) and basically copy the design. If you can scale the drawing, you should be able to get pretty close on the dimensions.

It would actually be pretty simple to do if you have CNC Plasma/Laser/Waterjet capability. You can cut the top/bottom halves with all the little "slots" for the baffles to lock into. Just cut the baffles with "tabs" to fit into the upper/lower slots. Drop it all together and weld the slots closed.. locking the baffles in place. Would be a fun project.. especially in polished 304 Stainless
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Unread 12-23-2013, 07:44 PM   #4
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i just happen to have a few piece of polished stainless laying around and and old flow master to cut up as well. but i want to modify the design a bit to possibly get a different sound out of them. possibly try an arc instead of the wedge flowmaster uses. who knows what i will end up with, but it will sure be unique.
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Unread 12-24-2013, 06:41 AM   #5
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http://www.expeditionportal.com/foru...r-own-mufflers
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Unread 12-24-2013, 07:51 AM   #6
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Quote:
Originally Posted by andrewmacc View Post
thats pretty cool, thanks.


his is built much thinner than mine will be. 18ga simply won't cut it IMO but with all his internal baffles it will strengthen the inside considerably but i plan on building mine more like a flowmaster, which his in no way resembles any flowmaster i have ever seen.
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Unread 12-24-2013, 10:11 AM   #7
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You could also use a off the shelf muffler and build a custom shell around it and then say you built it yourself
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Unread 12-24-2013, 12:02 PM   #8
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You could also use a off the shelf muffler and build a custom shell around it and then say you built it yourself
and what fun would that be?
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Unread 12-24-2013, 03:45 PM   #9
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Here's a video of Rick Bacon from Power Block TV building a muffler:

http://www.powerblocktv.com/two-minu...make-a-muffler
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Unread 12-24-2013, 04:32 PM   #10
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Yeah.. if there's a chance the muffler is gonna be dragged over obstacles (like rocks), I'd probably lean more toward something like 14ga.. maybe even skin the underside with 1/8" or 3/16".

I had an old Flowmaster that had been dragged over the rocks to the point where you could see the baffle "outlines" in the mangled lower skin.
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Unread 12-26-2013, 11:09 AM   #11
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You could also take a straight tube, drill it a bunch of times then build a box around it and even pack it with fiberglass to keep it quiet. This is how Dynomax builds some of theirs and I believe a few other brands are similar.

I've thought about this multiple times. I've got a few designs in my head but never put it on paper
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Unread 12-26-2013, 02:08 PM   #12
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You can pick up high temp insulation (Roxul) from McMaster Carr. I bought a bunch of it a couple years back for my powder coating oven project (still waiting in the wings.. )
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Unread 12-26-2013, 04:15 PM   #13
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Quote:
Originally Posted by Lifted96ZJ View Post
You could also take a straight tube, drill it a bunch of times then build a box around it and even pack it with fiberglass to keep it quiet. This is how Dynomax builds some of theirs and I believe a few other brands are similar.

I've thought about this multiple times. I've got a few designs in my head but never put it on paper
a glasspack is a simple design and would be easy to execute. i am thinking of a chambered (flowmaster) style with a unique internal baffle system. something truly my own.
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Unread 12-26-2013, 04:41 PM   #14
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I think the way to attach this, is by copying a successful (in desired sound) design, and then modifying it from there. Otherwise, it might take several revisions to get what you're looking for. That could eat up quite a bit of time/money.
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Unread 12-26-2013, 05:02 PM   #15
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Quote:
Originally Posted by BESRK View Post
I think the way to attach this, is by copying a successful (in desired sound) design, and then modifying it from there. Otherwise, it might take several revisions to get what you're looking for. That could eat up quite a bit of time/money.
that is basically the plan. i know what the insides of both a flowmaster 10 series and a 40 series looks like. i plan on essentially mocking their design but with my own style baffle. maybe look at others (spintec, hooker aero chamber, thrust, Cherry bomb) and kind of see what makes each one different while all still being a chambered muffler. then use one base idea but with my own twist.

current thinking is use a flowmaster 10 series design, but possibly use a curved baffle instead of the angle baffle flowmaster uses.
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