Converting a Chambered Muffler into a Straight Through Muffler
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- เผยแพร่เมื่อ 26 มิ.ย. 2019
- How a take a Flowmaster 50 HD and convert it to a Straight Through (absorption) muffler using Stainless Steel Wool and Ceramic Fiber commonly used in straight-through mufflers. This video will show you how to build your own muffler. I've built mufflers in the past, for an 82 Chevy Truck with a 6.2 diesel. I made stacks through the box for that one and built a complete exhaust system including muffler for a GMC Sierra with a 6.5 diesel turbo. This is a great Cambered vs Straight Through Muffler test.
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what we learned from this video is that everyone wants that plasma cutter
Lol...they are worth it, I've had this one since 1998
Hell yeahhh
Dear Santa get me one of those plasma cutters.
Me too
The cutter is the best.
Yeah beats the torch big time
I watched your video because I'm going to build a 3 inch muffler out of an old 20lb bbq tank. Good content 👍
I'm glad you liked it and found it helpful. Thank you for watching. 🙂
Another great martinbuilt video! Thank you so much for taking the time to share this with the world sir!
Your modded muffler sounds awesome!!!! Great job bud!!! 👍👍👍
Thanks 👍
Excellent creative solution and we enjoyed watching the customization process!
Thank you, I appreciate that, glad you liked it.
Nice work. In my limited experience a smaller muffler body often has a louder an aggressive exhaust tone, whereas a larger muffler body often has a slightly quieter less aggressive exhaust tone at least with straight through exhaust systems. And the same can generally be said for chambered exhaust systems except that chambered mufflers are slightly quieter and at the same time a deeper exhaust tone.
Great video and job keep the video coming I enjoy watching your channel
Great work over ,with a awesome sound
Thank you, Anthony!
Sounds real nice. I like when it’s not too obnoxious but still has a rumble
Thank you. I like the sound level as well.
I can’t believe I’m just now seeing this pop up in my feed… great work man… if someone has the plasma cutter and mig welder, it’s really a very affordable way to make your own muffler!!! Sounds great to!!!
Good afternoon Nick, nice to hear from you, really enjoy this muffler enjoy building it as well it does have a good sound thanks again have a great Thanksgiving.
Very interesting the next time I plan to do a new exhaust setup for tuning on my built Datsun I may consider this. Keeping the old-time tuning alive
Thank you for sharing, just did it to the stock muffler of my Mercedes w202 and sound way better!
Great video, very thorough!
that V8 sound AWESOME!
Thank you!
Amazing Work 👍
Subscribed!
Thank you. I appreciate that. Thank you for watching and subscribing
Sounds much better. Great job.
Thank you, I think so.
Great job and very good explanations wish you Merry Christmas
Thank you, and a Merry Christmas to you and yours.
Nice, I have a friend, long time a go make a job, like this, for me.
I like it.
This man is a machine!
Another very creative video Martin. Great job... I enjoy all your vids and ideas.
Thank you!
Pretty smart wokring👌 keep it up!
Thank you 😊 I'm glad you liked it 👍
Hello drin Germany! I need this for my BMW e91 ✌️ the Sound is amazing. Great Video. Greetings from Germany
Thank you I'm glad you liked it and found it helpful.
Thank you for watching always nice to hear from people from my father country.
You are an artist
This is really interesting material. I appreciate the effort you put into providing it. Many thanks!
I'm glad you like it and found it helpful.
Thank you for watching.😎
Thumbs up for that sound !! 😁
Oh yeah, thank you!
thank u so much.i learn many thing from your video. love you sir
You are most welcome
Dude you ROCK man. I'm a professional auto mechanic and do a lot of custom work, so it's hard to impress me, but you're ideas and methods are awesome. Great cutting and welding job too! Hell, I sure wish you were my high school shop teacher back in the day, I would have skipped way less classes! LMAO. Triple thumbs up Martin! Forget the haters too.
Thank you, Jimbo, I really appreciate that, I can't tell you how much that means to me. Take care!
Martin
@@martinbuilt 👍👌 I can't wait to check out your other videos soon too! I've been following Scotty Kilmer and Project Farm for the LONGEST, now I have another cool & badass auto channel to follow! Thank YOU my friend! 👍💪
You know what really ticks me off, even though I totally understand where the HATERS are coming from, (talking about "buy a magnaflow for 100 bucks, I get it) is that you took PRIDE in doing something with your OWN 2 HANDS AND SKILLS, not just a trip to the auto store or exhaust shop... NOW you can say you've got a MARTINBUILT muffler on your car! That's what I'm talking about. The non creative gearheads won't understand such things. BUILT, NOT BOUGHT BABY! KEEP IT UP BROTHER!
@@jimbosmith6031 I agree 100% with you, I am watching these videos because I like new ideas that I can use on my HOMEBUILT aircraft! I am presently re-doing my exhaust system from my turbo charger from my 1835 VW powered experimental airplane, there is minimum space in the engine compartment but I want to silence the exhaust as much as possible with as little weight as possible. For all you nay sayers out there, there is NO available store bought muffler for what I am trying to accomplish! Thanks for the info. Signed a Vietnam era veteran and experimental home builder/pilot.
Buy a new one dumbass
great work,
Thank you 😊
Great video. I was wondering if they made a muffler that is a combination of a chambered muffler and an absorbtion muffler. Like it uses chambers and has an outer layer with some fiberglass or similar packing. i found something called the flowermaster dbx but its not quite chambered.
Great sound
Thank you
Good technique!
I'm fascinated! A Retired Wrench of 35 years, I'd say this was a first!! I was also an Engine Builder and Racer.
It's fairly obvious that you simply turned a Flowmaster into a Magnaflow.... Without the huge cost of a Magnaflow. Genius in its simplicity!
In my book, anything that eliminates DRONE in the Cabin is a Win. You're a little louder at Idle (NOT a bad thing), but a decent amount quieter at high revs.
.... If I can ever afford a Plasma Cutter, I'd try that myself! 😉 Only thing different is, I'd try to find a sheet of Stainless Steel - purely for looks.
Thank you, I appreciate that!
I have Borla ProXS on my 02 HO with 3” from factory y pipe back to the Borla, no 3rd cat and factory 02 chrome tip tail pipe and mine sounds almost identical. I have another WJ with a 4.7 that needs to have its OEM from 99 exhaust fixed. I also have a spare flowmaster laying around and I’m gonna try this
I love the sound of your equipment (welder and grinder) really perfect, like in NOT
Thank you
good idea, good freeflow
Thank you Edward
Great job
Thank you!
Having owned a set of Martinbuilt mufflers for over 17 years I can attest to the performance & durability!
It don't get much better than Martinbuilt!
Thanks James, that was my first set I ever built. I got to make it down there we will do a walk-around video on the war wagon..
I realize you're extremely busy! Eventually :- )
looking good I have made an air rifle silencer exactly the same only on a smaller scale .
Thank you, I could use one for my pellet gun.
Nice job.
Thank you.
ive had visions of making my own mufflers and testing them on my truck and possibly modifying other already made mufflers to see how they would sound ? like half of a magnaflow mated up with half of a flow master 40 minus the dividers and v shaped sound plates ? also it would be cool to cut out the top outter panel like you did on the muffler on other brand name mufflers but replace it with a sheet of plexy glass and seal it. then using a shop vac with no filter and a fog machine I would hook up the vaccum on the exit port and have the fog machine pushing for through the inlet to show what the exhaust gases are doing aka flow and or turbulence inside the muffler . maybe even starting my own line of performance mufflers?
yeah, I like that idea, maybe next time.
From Flowmaster to Flowfaster! 👍👍😎😎
That would have made a great title!
Cool video😎
Thank you!
I could do the same thing that your doing but instead of the heavy duty screen for internal pipe just buy cheap sections of pipe pieces from O reallys and just drill holes all over the piping. I'd use bag of steel wool and a roll of insulation from a home improvement store and wrap the internal pipe and fill the rest with insulation
the plasma cutter rocks
What timing chain kit would you recommend for 2000 dodge Dakota 4.7 litre?
Hey Martin, how has this muffler held up these last few years? I'm interested in doing this to a stock muffler I got from a junkyard. What kid of fiberglass insation did you use?
Awesome!
Thank you! Cheers!
cool well done
Thank you!
I have always seen ones with packing but what does on sound like with just an empty chamber
Martin Built a muffler. How custom is dat. This dude is a Jeep genius. Your horsepower should increase a lil bc there's no restriction in the muffler. Excellent idea dude.
Thank you, I could have probably just got myself a Borla muffler they are very much the same design but then what fun would that be.
@@martinbuilt I really need to get an air compressor and a plasma cutter and a welder........... Shucks I need a whole shop. I got ideas fa da xj
Thank You
Glad you liked it.🙂
@@martinbuilt : 😀
Good day Martin, have a question for you...nor related to exhaust ,but to power. I have a JGC 2005 with a 4.7 i know that the same engine develop quite a bit more since 2008 I believe...as far as I know here are the difference between the two.
1- dual plug head , 2- increase compression , 3- better cylinder head flow , 4- new combustion system (better fit to handle E-85)
just about everything seems centered around those cylinder heads. (Do you think it is possible to swap the newer head onto my 2005 GC. Any information would be greatly appreciated. You have a fan for life. Thanks for all you do. It really helps.
Many Blessings
AL
yeah that sounds about right. I believe there are some other changes to like the connecting rods got heavier the Pistons got heavier things like that. I haven't had a real close look at the 08 cylinder heads to compare them. But by looking at from pictures that would seem to me that the combustion chamber CC's has increased. But they're probably increasing compression from the Dome of the Pistons And if that is so you would lose compression by bolting them on your 4.7
Been waiting for one of these engines to show up at Pick-A-Part. There was a cylinder head on eBay a few days ago that was complete I almost bought it for the $300 they wanted for it. But I do believe that the swap is possible.
PS the bolt pattern for the exhaust manifolds is different between the two
sounds better and makes less noise. good
Yes, and yes, thank you!
@@martinbuilt you're welcome
The things we do to keep ourselves out of trouble 😄
yep, it seems to be working, I haven't been in trouble for a long time...lol
@@martinbuilt that's great man. I did a chassis lube this weekend. That kept me busy.
Thanks again for another great video! I wish I could do this in PA in some situations. Inspection out here prohibits welding on a muffler period! I run a Thrush Welded muffler ( That is it's name) which has the same flow thru design, and sounds great, much like your finished product. My muffler costs about $30.00. How much total did yours cost between purchasing the muffler, then all the extra metal, and packing?
Thank you, I originally paid $50 for the Flowmaster 50 HD picked it up on Craigslist the guy only had it for like a couple months. Then I probably got $35 in packing material. And the perforated metal I got from a friend of mine that has a welding shop he gave that to me for free.
What part of Pa do you live in? My county it's legal to weld a muffler
I've lived in PA my whole life and am an auto mechanic of 16 years with an inspection license for roughly 12 of those years and I have never heard of anything like that 😂
I'd buy a similar sized Magnaflow muffler and compare the two
Her: He's always working late. He's probably cheating on me.
Him:
Nice work. But the next one you do just grab two sheets of stainless and build it how you want it. It is easier.
Good vidio
Thank you I'm glad you liked it and found it helpful.
Just curious why you used steel wool and the fiberglass insulation instead of one or the other? Does using both make for a different exhaust tone?
I had purchased the fiberglass 1st and then when receiving it realized it was not nearly enough then I purchase the steel wool because it is much cheaper by volume.
Did your custom straight-through muffler have less drone than the flowmaster 70? I know they advertise the 70 as being drone free.
You can't beat the 70 for lack of drone. It is a quiet muffler, to begin with. Yes the 70 has no drone.
you just convinced me........i am gonna buy a plasma cutter
Have you ever hear the sound if its hollow ?
Patience of JOB!
i am preparing to do that but i am in doubt: i wanna make it quieter for high frequency, and what diameter of hole is the best: small 2-3mm or big 5-6mm or it would be better to use inox net with 1mm wire and hole that can be any from 0.5mm to 10mm
I personally don't know if the whole size would make any difference as far as dB would go.
A lot of work, but it sounds damn good.
I like diy mods like this. Chambered are supposed to be quieter than straight throughs but it's the other way round in this case because of the larger than normal holes in the perforated tube, you could have had it abit more quieter had you used more glass pack than scour pads.
I would have liked to used more of the glass pack material but it would have been costly to fill that muffler.
I have a question, how much horsepower is your Jeep making, and another question does the 4.7 power tech rev to 5,800 rpm or only the h.o
I really don't know for sure, never had it on a dyno. I have revved it up beyond 6000 rpm, hasn't come apart yet.
Sounds good I would've made it half of the pipe and half holes stuff so it's a little deeper good job though
Thank you.
Hey Martin! I tried to call the Jeep parts department in regards to a 2001 Jeep WJ 4.7L rear catalytic converter. I just had one stolen off of one of my WJs here in Vegas and am looking to find an original one; However, I can't find one for the exact year, because they are discontinued. There are 2003 and 2004 converters available but the parts department wasn't able to answer whether or not I would be able to use those. Since you are one of the most talented mechanical engineers I've seen on TH-cam and have a lot of experience with this vehicle, I figured I would ask you. Any thoughts on whether or not I would be able to use the newer converters and if not, is there a particular rear cat you can recommend? Thank you in advance!
Thank you. I really appreciate that. I would think that the newer one would work just fine. On my WJ I used a MagnaFlow hi-flow cat. It is a lot cheaper and the thieves won't steal it.
@@martinbuilt You're welcome Martin! I appreciate your input and suggestions!
It’s like a Magnaflow so much better than the hollow sound
yep, like a Magna Flow or Borla
Nice. Don't have to buy anything and can I borrow your plasma cutter haha
Sure come on over.lol
Why not just put on a Glass pack muffler? Same thing.
Glass pack mufflers burnout quickly
Now that’s what I call a custom exhaust lmao!
Thank you, glad you liked it.
Nice video. Been meaning to ask. What happened to the XJ?
I still got the XJ, matter of fact I'll be working on a project this weekend for it. Will be installing a Ruff stuff over the knuckle 1 ton tie rod and ends..
@@martinbuilt thats great to hear! If you make a video I'll be looking for it for sure. Always got good content on here.
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How does it sound under driving ? Any performance drop ?
It has less drone then before and a little bit quieter Overall. No performance drop
I'd love to know if you gained at touch of HP & or torque with the straight through? Quieter with more power would be a real win imo.
That is something for the dyno, hard to feel a few ft. lbs of torque.
It’s a known fact that flowmasters are highly restrictive! Flow tests have proven this!
I have seen videos where they put the stainless steel wool inside the tube and just put some barrier so that the steel wool will not be blown away...
That would seem to be restrictive and cause backpressure.
A stupid question, I have one muffler from China and what would happen if I would just strip the inside and put nothing in it. Would I get just basic muffler delete for cheap?
yep, that's what it would be with the illusion of a muffler.
Basically he turned a tone rich chambered Flowmaster muffler into a deeper muffled tone perforated Magnaflow Street muffler.
Being an old street rodder, wouldn’t just using a 67 thunderbird resonator / rear muffler component accomplish the same outcome ? Awesome thin profile, super flow and noise tamer.
You should have welded a couple bolts on the neck and called it Frankenmuffler...nice work.
that's funny, thank you
How much you thing sum like that will cost ?? In a muffler shops
This is really for the do it yourselfer. A muffler shop probably wouldn't do it.
Not the best welds I've seen but good vid
WOW perfect..ho Italy 👋
Thank you for watching appreciate it.
Just a tip for the future. The further back you place a muffler, the quieter it will be. It will also be less restrictive because the exhaust gasses are cooler.
Thanks for the tip, I could have moved it back 6 more inches.
I was taught hot gasses flow faster than "cool" thats why we use thermal tech wrap on exhaust pipes.
Can i cut the things that block the sound and just reweld it . Will it be a good idea?
I would think if you just removed everything from inside the muffler and then reweld that would be nearly as loud as a straight pipe. 🤔
@@martinbuilt ok thanks . This is my another phone
It was more silent at 5K rpm after the modd?
Yes it is, thanks for watching.
This muffler should be cleaned after how many kilometers it runs Sir.
Motor affect your omissions when you have to go to omissions testing
There is no test for omissions.
Martin, seemed like a lot of work for just 3db's. I am sure I am going to get hammered on this but, wouldn't it have made sense to just find a muffler that suited your needs? Not knocking your workmanship. You are awesome...
yes it would have been easier to just install a Magnaflow or Borla but then it wouldn't be a martinbuilt built video. 3 db doesn't sound like much but there is a big difference between 100 and 103. db have an exponential growth. Thank you for commenting.
@@martinbuilt Awesome... if I had the tools you had . I most likely would have done the same thing ....Love your Vids...
It’s about sending a message
Get your piece of quarter inch brass clamp it to those holes then weld the holes
Greetings. Do you think that if a metal mesh made of sufficiently thick wire is used in a direct-flow muffler as a central pipe instead of perforation, noise absorption will improve? The grid will reduce the speed of passage of gases, which will add time to filter noise in the muffler. And the mesh will increase the contact area with the fiberglass.
Yeah, I liked that idea. You would most likely end up with a quieter muffler. 🙂👍
What would happen if you just take the insides out without putting anything back in! Like what would it sound like?
I would imagine it would be load, almost like a straight pipe.
@@martinbuilt ok, I had the idea to do it to my V6 Accord! Do you think it would be to aggressive?
@@tim6398 it all depends on what's too aggressive for you and your neighbors.
@@martinbuilt yea, Thanks for replying! Really appreciate it!
Buenas tecnicas...😉
Thank you. I'm glad you liked it.
Thank you for watching.
@@martinbuilt gracias a usted por su tiempo. Bendiciones
Will doing this void the Flowmaster warranty?
: D
Lol..I'm sure it did. I voided the warranty back when I cut the ends off and swapped the inlet and outlet.
No it will not😁.
you did a very nice job 👌👌👌... but now it's time to change those hand gloves.... safety must.
thank you, yep I bought a bunch of them but I still cut the tip of the left-hand point finger off so I can answer the phone.
i wish i had a plasma cutter !!
They have gotten a lot cheaper over the years I paid $1600 for this one back in 98. You could get yourself one for several hundred dollars.
@@martinbuilt thanks for the respond i would have to star saving for one of them definitely , liked your video thanks for sharing !! greetings !
Wow that was a lot of work Martin.Seems you could have just bought an off the shelf muffler and been done...lol...
Yeah absolutely could have just bought a MagnaFlow or a Borla they are basically built the same way I did this one straight through with absorption material.. but then it wouldn't be a martinbuilt...lol
Genius at work... ❤️