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This instructable will explain in depth how to rework your exhaust system to make it purr/roar/growl (which ever description you like)

NOTE ABOUT THE VIDEO, AND I WANT TO PUT THIS NOTE RIGHT HERE TO MAKE SURE EVERYONE SEES THIS NOTE..... THE FIRST PART OF THE RECORDING, THE CAMERA WAS REALLY CLOSE TO THE ENGINE, SO THE CAMERA PICKED UP THOSE SOUNDS.... I HAD NO IDEA BECAUSE WHEN I WAS THERE WHERE THE CAMERA WAS, IT SOUNDED FINE.... AND THEN THE SECOND PART WHEN I DIDTHE CAMERA ADJUSTMENT, WAS DOWN THE SIDE.... NOT RIGHT BY THE MUFFLER, BUT ON THE SIDE NEED THE PASSENGER DOOR KINDA.... BUT IM REALLY HAPPY WITH IT... ILL GET SOME MORE SOUNDS UP IF THIS GET POSITIVE FEEDBACK.... OR IF ANYONE REQUESTS IT........ HOPE YOU LIKE......AND I SWEAR TO GOD IT WAS BECAUSE OF THE HILL!!!

id also like to say that if there is another instructable about this...(yes i did search) then ill delete mine..... unless mine is totally better

First off I'd like to appologize for no pictures. I know even after i appologize for this people are still going to complain. but ive already done this to my truck, i didnt think about instructables because time was against me (needed my truck up and running to go to school tommorow) but again sorry for no pictures, cuz there is no way im putting it back the old way so i can show pictures..... if i ever do this to another vehicle ill be sure to take pictures.

but due to the lack of pictures i will try to detail as much as possible.
also I'll try to get around to getting audio up of what my truck sounds like (ok i have the sound now.... sorry sound quality is bad.... and also i wish i had a before recording of it :( )

basically we're going to remove the muffler (NOT THE CATALYTIC CONVERTER!, thats illegal)

oh one more thing, this instructable is designed for those who are lucky enough (or in some others opinion, unlucky) to have clamps that hold their pipes together {see 2nd picture}

i repeat: pipes are not welded together. pipes ARE held together with clamps...... note* the way its held together (weld/clamp) only matters for the two connections on the muffler.

Step 1: Aquire Tools

You will definatly need an adjustable wrench

it is recommended to use a ratchet/socket wrench ? see photo, im bad with tool names
have an assortment of fittings, i used 4 types 10 mm, 13mm, 14mm, and 15mm. (fricken metric system)

if you dont use a ratchet/socket wrench then you'll need 2 adjustable wrenches

possibly (and in my case) a compressor and a die grinder. if you dont have either of those.... youll need a hand saw or whatever kinda saw you can find that will work, and alot of patience.

possibly a flat headscrew driver and a hammer
1985 Yugo - 3 cyl street mod, tubbed and blown (hair dryer) last 1/4 @ 27.5 seconds. <br>Fuck you all... my next beast is a Prancer
Hmm, all these loud mufflers are getting a little old. When i hear one i don't think &quot;wow, that guys car is probably pretty bad-ass,&quot; i think &quot;Wow, that guy just put a $20 muffler tip on his truck or car.&quot; Heres a secret, that coffee-can/fart-pipe muffler is not nearly as impressive as you think. take your money and make your car *actually* run better.<br/><br/>I'm going to give $10 to the first person to make an instructable about modifying your muffler to make your engine completely silent. That, i think, would be cool.<br/>
Same here, I like the deep sound on a truck or sport coupe but not on anything else (Honda or any kinda import) I don't even look anymore :(
haha, my camaro has the muscle to back up that beastly rumble, I love pulling up to a little riced out honda and revving it up, he revs back and when the light goes green all he sees is tire smoke and I see him in the rear view, and hear that little engine revving so hard it's probably going to give
Just putting my opinion in here. your &quot;beastly Camaro&quot; probably isn't all that. I'm not saying that Honda's are the bomb. I'm just honestly stating the fact that your &quot;beast&quot; can lose to a foreign car. Don't let your head swell up too much because you have a two ton car that runs 12's on the quarter mile stock. &lt;--- If driven too it's full potential of course. <br><br>
In 1980 My combination: 1964 Chevy II. 327 2.02 (fuelie) double hump casting iron heads. street port. 11.5 to 1 compression TRW pistons. Forged rods ARP bolts. <br>Factory forged crank. Offenhauser port-o-sonic intake manifold. 1-3/4 primary fender well exit heddman headers 6qt. Moroso oil pan. two stage oil filter relocated to inner fender. 600cfm vacuum secondary Holley w/ modified annular discharge, different power valve and jets. Corvette dual point w/re-curve kit and Accel coil. Autolite plugs 1 step colder. Mcleod HD clutch and M-21 4 speed turning 4.11 posi and 9 inch slicks. Best ET. 12.1@115 mph Bandimere Speedway Morrison Colorado summer 1980. I drove this car everyday to work for 3 years and just had to change tires at track to race. Total invested: $2100.00. You can't do that in a Honda with your &quot;B&quot;series or Integra motor unless you turbo, run Nitrous and gut the interior. BTW my Nova wet weight was 2700lbs. RICE SUCKS.
Well my car was sold in December of 09. It actually did run 12s lol. But I am at a much higher elevation than sea level, about 4400 above, if I'm not mistaken. It wasn't stock though. I had to do a few things to get it to run 12s. Anyway, yup, it's gone and I want another one.. =(
(Old comment I know, sorry) My friends car has over 500 horsepower with the dyno to prove it. The exhaust is a bit annoying, but people still think it's a ricer car. Rotary engines!
Rotary engine is (Rice) Mazda (Japanese) too bad they stopped production of rotaries in 2011 . Felix Wankel really had a good idea. The Japanese really spent a lot of time on it. 500HP? I am assuming it is Turbo/Nitrous or also a three rotor? I toyed with bridge ported 13B's in the 80's. Rotaries just got too expensive.
rx-7 for the win!!!!!!! i miss mine
could probably kill blind people because they dont hear your car its like getting hit by a prius but bigger still hurts tho
That would be amazing, but I think Rolls Royce has the market cornered. lol Plus, it'd probably rob power. :(
I have actually scene a car who's exhaust was modified to nearly silent. <br>I believe that had a walker exhaust Quiet-FlowSS Muffler something in the 20000 series, I dont have the exact model number, but they had dual mounted these mufflers, with what appeared to be steel pipe about a quarter inch thick welded to the exit pipe, on the end of that was a reverse conical header. Their car was very quite, and i imagine it had no trouble passing smog what so ever.
will cutting the exhaust right after the muffler make my truck louder? i have a 1994 dakota v6 and its already kinda loud and i was wondering if it would work and will it make it perform better?
our schools race car does not have a catalist and it runs better without it i dont know why
that's because everything in the exhaust system creates more back pressure now some back pressure is good to an extent but beyond that u start loosing power most cars produced now a days have such a restrictive exhaust that u could easily see 10 - 20% in cress in power if u ran pipes from the header straight out the back of the car
i love strait pipes thanks for the reply
what do yo drive
i took every thing behind the header pipes off : )
you could gut out the cat and put it back on so the garage would not notice then put on some glass packs: }
haha, nice. my truck has glass packs. my camaro's getting one glass pack, it has a y-pipe so it only gets one =( later I'll build a completely custom exhaust with full length headers, dual cats, and dual glass packs<br/>
I find the idea that backpressure as a good thing humorous...do you actually know what back pressure is and it's use? Back pressure whorks against the valves in an engine, thereby worknig your engine harder. Back pressure is not agood thing generally speaking. However Back pressure is used in the scavenging effect of RACE motors, as street motors are very rarely tuned in sch a way as to use scavenging to any large effect. Back pressure good for cars? Ha
a little back pressure is good because it keeps the valves from moving too freely and wearing out faster since it pushes against the valves.
yeah ok um valves don't need back presser to help close them they have springs noob..
Two words: Valve springs:)
On top of that... Valve springs close valves, cams open them. If you need backpressure to get your valves to work your car is probably not running. Not being free float devices, valves movement comes from mechanical parts (well, USUALLY). There fore backpressure works against the valves which works against the mechanicals which operate them
must be a chebby guy, that or you drive a civic.<br/><br/>stfu you dont know enough about cars and engines to talk about backpressure. turbo+backpressure= not good<br/>BUT! n/a+backpressure= better fuel burn and mpg(stock cars)<br/><br/>n/a+backpressure=better burn(= more hp) faster revving....<br/><br/>please go away you car guy noob<br/>
mufflers create allot of back pressure which holds back power. it is best without a muffler.
heheheha <br/>RE: <strong>I find the idea that backpressure as a good thing humorous...</strong><br/>And<br/>RE: <strong>Back pressure good for cars? Ha</strong><br/><br/>Unless of course you happen to be taking about a Two Stroke engine.<br/><br/>Detroit Diesel 2 strokes use this principle.<br/><br/>What I did not know was that Racing Engines use the principle.<br/>I guess you must be talking with fuel injection...<br/><br/>BTW, Nice idea for a post.<br/>Wallpaper... Um... No.<br/>The slits... I have no idea what that was - made no sense.<br/>
Eight, The slits he was talking about were necessary in order to remove the muffler from the exhaust pipe due to the muffler clamps deforming the flange of the muffler where it attaches to the exhaust pipe. Evidently, he didn't have a set of oxygen acetylene torches to heat up the area where the muffler clamp deformed the metal the flange of the muffler. Therefore in order to separate the pieces he had to use a die grinder, (or what ever he had at his disposal) to cut a slit in the muffler flange, (parallel to the exhaust pipe) so he could pry the flange of the muffler open in order to separate it from the exhaust pipe. Hopefully, this helps to clear up what he was trying to explain.
It did indeed. Thank You.
I beg to differ heheheha, back pressure in almost all unmodified little four bangers, is a necessity, but only on non-modified, (performance enhanced) four-cylinder engines. In fact, I'm sure there are quite a few people associated with instructables, whom own four-cylinder vehicles, and can back up my claim after having a leaking exhaust system repaired, and they've noticed an increase in power, (and/or performance) after the repairs. However this is only true for little four-cylinder engines, which have never had any performance enhancements done to them! From my well-trained ear, (I was a certified Master mechanic for a number of years) I would say that this guy should have spent his money on a throw out, or release bearing, (from the sound of the noise I heard prior to relocating the camera) not to mention a tuneup! But hey, give the guy credit because his intentions were noble even though to most of us his efforts were more of an annoyance to our ears.
just pop holes in the muffler, many many holes.
That picture of your desktops wallpaper was a little...odd...but back to business. To get a decent sound get a good quality muffler some new headers for a nice deep but not extremely loud sound. The sound also depends on what type of muffler you get. Some starting mufflers are at around 50 bucks and up. Just another idea.
QUOTING EARLIER COMMENT by ROTOROct 18, 2006. 11:53 PMrotorsays: or you could do what I do and wait for 10 years and allow a baseball-sized hole to rust through your muffler, giving it that rich, full-bodied sound that satisfies that deep-down body thirst. Jan 18, 2008. 3:55 PMsunspunsays: HAH! rotor says you can get the same effect "by accident", if your muffler happens to develop a hole in it from rust. That's exactly the approach I took, rotor - or rather, the approach my car took. It's been at least a year since I first noticed something... different... about how my car sounded all of a sudden. Just got awful loud for some reason; I was embarrassed at first, mainly when idling in traffic. I thought the muffler must've fallen off, so I asked someone to look under my car, and he said "There's a hole in your muffler!" I'm perpetually broke so never have done anything about fixing it. Apparently, though, that doesn't make it run worse or anything - just makes it louder, which, after I got used to it, I decided I like it better this way (most of the time). Makes my 92 Beretta (I'm the original owner) almost cool! (Or so I like to think at least) ;-) THANKS FOR POSTING THIS sunspun
It's not illegal around here (Toronto) I don't think. Everyone does this to their little tin can Civics and Integras. But this doesn't make your car sound more powerful, it just makes it loud. Remember, power is in the engine, not the muffler. Speaking of mufflers, aren't they supposed to muffle the sound? In which case this makes literally no sense.
yes it literally does make sense. he wanted a meatier sound so he removed the muffler. what is it that you don't get?
I'm aware of his intentions, I just don't... agree with them. But, to each his own I guess.
this instructable is taking the muffler off.
I believe that little tooly thing you have there is a ratcheting socket wrench... so you were basically mostly pretty right.
No offense.... ...nobody cares about your computer's desktop. What we DO care about is the information you're teaching us. How's about pictures that are more in-line with what you're doing. That would be more helpful than pictures of your desktop. Not trying to be mean, but if you're going to attach photos, make them relevant to the instructable, not your personal workspace.
hey I have a good wee project you'd like I'm in the process of creating a new air filter box for my mum's car cos the standard stock filter/box combo makes it a bit breathless and the turbo's on it's way out so this seemed like a great plan to suck a little extra air in... I know a scrap-man who ends up with a million and one air filters including many K&N etc so I dug up the best conical filter I could get for fitting onto the intake directly and have just to get a section of pipe to fit around it and get sealed on then it has to cone inwards to where the other intake pipe which would have gone into the airbox cost so far: £0.50 Gave fifty pence for the filter
Sounds like crap really. You just did a standard straight pipe job. Sounds like your truck is a 4 banger or a low end V6. If you live in a state that doesn't have emissions and you can get away with a straight pipe might as well take out the cat too. Who will know unless you take it to a shop and they lift the car or find out why you have a engine code for a missing cat.
Your not going to notice any power by only the straight pipe unless you get rid of the catalytic converter. Furthermore you'd be better off to invest in upgrading your intake or simply a K & N air filter is a great investment. You'll get much more air coming in, this translates into more power and better gas mileage plus its reusable.
you shouldnt do anything that opens upexahust flow on smaller engines... the smaller engines may sound stupid with there exhaust... like riiiin tin tin tin tin instead of purring but they NEED the back pressure for more power... in short smaller engine go with intake mods/ exhaust mods that dont increase flow greatly and with the bigger engines GO CRAZY WITH YOUR EXAHUST... thats the reason the little cars come with tiny exhaust pipes
by tiny i mean tiny diameter
so apparently not many people here knows too much about cars. as a matter of fact straight piping does in fact add hp. if only a little by increasing flow of exaust, the down side to that is that it reduses the amount of back pressure on the engin which you dont want, lucky cars like my del sol, have a catback exause which adds backpressure to compansate for the lack of pressure by removing the muffler.
What is it with kids' lack of self esteem these days that requires them to do crap like this to draw attention to themselves? Why don't you put this effort into learning to spell? Or perhaps some grammar lessons?
heh heh must admit I'm becoming a right old lurker on this project, just got an email from another fella or lass, who can tell with user id's ;), asking for some advice after reading this thread (good luck with the side exhaust project btw! If you build it make sure to put it up on the site and shoot me an email so I can find it.) Anyway got the email so thought I'd stick my head back in again see what's shaking over here. Thanks for your kind words jesus10555, hopefully you've had a chance to look around on the web and ebay and pick up a cheap muffler, trust me for the $20 your ears and sanity be thankful and your setup will be all the more impressive for it, get that quieter, more menacing sound. Good excuse for adding another chapter to your project too ;). Anyways, I just have to say I did a genuine double take and had a good belly laugh at this particular gem. A two line post, first line: what's wrong with kids self esteem these days, second line: ragging on the dudes spelling and grammar... ahh comedic gold mate... But seriously, it's not about self esteem, your not going to believe me, but hey, until your willing to look at why they do it with an open mind, your just not gonna get it. Comments like that aren't doing anything more than showing us you don't get it, and you don't want to get it. But you need to trust me on this, if you keep spouting things like this you'll end up looking like someone who says Picasso couldn't paint properly and was just trying to get attention... Sure we're not all Picasso's, even if a lot of car projects out there end up looking like one lol, doesn't mean we shouldn't each take our chance to get up and do what we want to do though... Hope ya don't take this personally mate, but this is a public forum, you've had your chance to share your views, and I'd like a chance to comment on it, in public, where a lot of people who share both our views and many more, will have a chance to read them, and maybe a few of them will take a moment to ponder on them. I can't resist... such a bad example of me being a hypocrite too... buuuut... "...learning to spell? Or perhaps some grammar lessons?" That's a sentence fragment mate.
Dont write in comments here to often but thought I'd just stick my head in. I'm one of the owners of a modifiers workshop in Perth Western Australia, and like to lurk around sites like this, just to see what people out there are doing, and all of us who last in the scene any amount of time are tinkerers at heart ;) Really warms the heart to see more young modifiers out there crawling around under cars and trying things out, exact same way i started, every mod had to be done for $20 or less, and invariable led to a small fire or work order from the police lol. One can get a bit jaded when you deal with so many rich kids and buyers not builders. They just dont get that the rewards of a modified car isnt how much money u can spend on your compensator, its about building something of your own and testing it against other machines (in a controlled environment of course) Of course also knew the second I started reading there'd be complaints about the noise too ;) Dont sweat it man, all part of life, people are going to get wound up about loud exhausts, same as they will about lawnmowers on sundays, planes flying to low overhead, and insane neighbours who spend all day in the driveway making bizarre projects they found on some online site... Can't please everyone, if theyre gonna be so selfish that they wont give you the room to do what feels good for you, whatever, of all the things u could be doing that hurts others or yourself... eh, people who get wound up over stuff like this, just aint worth paying attention to. Right enough of the wisdom of the ancients lol. First a few corrections. a) this is a power increasing modification, believe it or not, for a N/A engine like this the majority of the power that can be gained by scavenging exhaust flow is determined by the manifold/extractors (sorry if my terminology doesnt match with the Americanised names for exhaust components but if it doesn't, deal), and with a cat in place anything after it will just be causing excessive back pressure. Running a straight though cat back exhaust like this will give you the minimum back pressure, allowing the Extractors to come into their tuned frequencies and do their things. Having a sports muffler on there would dampen down the sound a bit though and make it more liveable. I find most people want their car to have a deep noise, but a relatively quiet one. Having a loud exhaust really does start to grate a bit when your caught in traffic or listening to tunes. b) Brazing is a good idea, only thing is you want to choose your solder well, because if it reverts back to liquid again when the exhaust warms up your going to be leaving your exhaust behind at the lights. c) Clamps are a good idea, and I know getting hands on a welding rig or someone to weld it for you can be tricky especially for modders starting out. But remember that when the metal heats up it is going to expand, some wriggles may appear in the piping and if it gets bad, again peices may get left behind, make sure its well attached. The other thing is the system is going to leak unless its welded, so be really mindfull if the car is stuck in a traffic jam. If those fumes are leakin from the exhaust right under your seat, u may be sucking them in, and they dont do you any favours. So well done, you've joined the ranks of car modders, maybe have a think about getting the car in to an exhaust shop and getting some welds banged on, and i think a nice muffler will make it much more liveable. Find a cheap chinese muffler that can be welded in, the "brand name" stuff is just what people like me use to keep the rich kids happy, truth is it all comes in the same box from the same factory from china. A $25 chinese muffler with a decent exhaust diameter will give u the same flow characteristics as a brand name.

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