Not sure if this would be relevant and count as exhaust, but heres my current setup:

ZZP catless mid length header/DP, stock catback

Fly-by

 

Totally relevant. It'll help those who want to put on a header and downpipe but keep the stock exhaust. Thanks for your input.

 

very wise/useful info here(especially since its from an integra forum...since we know how bad and raspy small displacement 4cyl sound...i.e. some exhausts on honda engines)

LINK
Exhaust design effects on noise - Team Integra Forums - Team Integra


Exhaust design effects on noise
Posted 06-03-2002 at 12:00 AM by SurferX

Which exhaust sounds best? The question pops up all the time but no one can ever agree. Of course everyone has a different perspective of what sounds best on their car. I see it all the time, guys rolling around with their raspy weed eaters yelling praises to themselves about how awesome their car sounds. It's a fact, our low displacement 4-cylinder engines by nature do not emit a very respectable exhaust note. Try running open header on your car and you'll see what I mean. In order to change that high pitched rasp into a respectable growl we need a properly designed exhaust system. Different methods of reducing noise in an exhaust system Restriction- The easiest way to reduce noise is to simply restrict the sound waves from exiting the exhaust system. You find this used mainly in OEM mufflers where sound waves are directed into dead end chambers. This of course is the worst performing of the bunch, as the exhaust gas pulses will also be directed into those dead end chambers. Absorption- Most common in aftermarket muffler designs. The absorption method uses a perforated tube wrapped in some sort of insulating material. The quality of the insulating material will determine the exhaust note in these cases. An insulating material to stay away from in this case would be fiberglass, also known as glasspacks when used in mufflers. Fiberglass does not have a high resistance to heat and can melt over time making your car sound worse and worse. Reflection- This method decreases noise by reflecting sound waves into each other. This causes a scientific effect known as "destructive interference". If a sound wave runs into another sound wave of the same frequency and opposite phase, then the sound waves are both cancelled out. Thanks to physics master cheezthis for explaining that to me. Next page we'll get into specific exhaust parts and how they can be designed to achieve different exhaust tones. Let's look at the Integra exhaust as a whole shall we? An exhaust is just a pipe, no taboo about it. There are only two main pieces responsible for manipulating exhaust noise. When choosing an exhaust, you can look at the design characteristics of both of these parts and get a basic idea of how the exhaust will sound. Resonator These are usually installed a couple inches after the cat outlet. The resonator uses the reflection method and will determine the exhaust note based on it's size. The shell of the resonator is sized so th when sound waves enter, they will bouce straight back to the center and be cancelled out by the following sound waves. The longer the resonator, the more sound waves get bounced around and cancelled out. Some exhaust manufacturers will use two smaller resonators instead of one large one. The method that the resonator uses to decrease noise does not have any adverse effect on performance. Alot of people are mislead into thinking removing the resonator can free up exhaust flow. HyTech Exhaust in Irvine, CA tested their catback with and without a resonator and the dyno showed a difference of 2whp in favor of the resonator. In case you were wondering, HyTech used a Magnaflow resonator on their system which looks like this. Looks real restrictive doesn't it? ;-) Muffler Exhaust manufacturers can use a single method or combination of methods to manipulate exhaust noise with mufflers. The main muffler designs are chambered, straight-through, and twin-pass. Chambered This is mainly a combination of restriction and reflection methods. The dead end chambers like I mention earlier serve to keep sound waves from exiting the system. For sound waves that reach the end of the muffler, the majority are reflected back to destroy any sound waves that may be trying to get through. Very quiet but also somewhat restrictive. Straight-through Absorption is the name of the game here. The size of the muffler is going to play the most important role in how the exhaust note will sound. A short thin muffler casing will ensure a louder higher pitched note while a long and fat muffler casing will give a deeper and quieter note. Also, exhausts like the Greddy EVO are designed so that the pipe enlarges when entering the muffler. This slows the pulses down and allows more sound to be absorbed. That's how a muffler that is relatively sma like the EVO sounds much better than other mufflers it's size. So sometimes you also want to find out what the piping size INSIDE the muffler is, as that can also attribute to how the exhaust will sound. N1 Straight-through A more extreme design of the straight-through systems are the "N1" style mufflers. As you can see, there's little to no sound absorption going on here. Muffler is short and very small. Insulation material is kept at a minimum. This flows no better than a regular large muffler straight through however will sound much louder and high pitched. Couple this type of muffler with no resonator and you'll turn your Honda automobile into a Honda weed trimmer. "Hey my weed trimmer sounds tiiite yo!" Twin-pass The method used with this muffler to reduce noise is mainly absorption. The pulses have to travel through the muffler twice, which basically makes the muffler twice as long with twice the sound killing power. Also some acoustical tuning goes into making a muffler like this as well. With brass wind instruments, you change the note by selecting different length tubes for the air to travel. Longer tubes will give a deeper note while shorter tubes give a higher note. This type of muffler basic lengthens the tube, allowing sound waves to spread out and emit a deeper tone once exiting the system. The twin-pass design flows as well as a straight-through but will sound much quieter.

Muffler design chart

Ranging from 1-3 (lowest to highest).
Exhaust Noise level Flow capacity Chambered (OEM) 1 1 Chambered (aftermarket) 1 2 Straight-through (larger muffler) 2 3 Straight-through (N1) 3 3 Twin-pass 1 3

It's usually a compromise of some sort, but there are ways around it. If you are willing to shell out the big bucks for a twin-loop system you will get the best of both worlds. Some like it loud, some like it quiet, it's up to you. There is no such thing as loud and deep with our cars, you get one or the other despite what the show boys tell me with their "super loud AND deep throaty" N1 exhausts. Some people have weird perspectives on what sounds "deep" so best to educate yourself on what makes a deep sounding exhaust rather than listen to whackos tell you how their weed-eater sounds "mean".

 

WOW! Great post rootbeer! I honestly think that it could be its own sticky. If you want to I will hold off in case you want to delete your post and make your own before I add it in. So it's entirely up to you.

 

lol i stole it....uhhh, i mean borrowed it from an integra forum so go for it if you want

 

ok. it will make a nice addition to the thread. for you

 

A cross compiler is a compiler capable of creating executable code for a platform other than the one on which the compiler is run. Cross compiler tools are used to generate executables for embedded system or multiple platforms. It is used to compile for a platform upon which it is not feasible to do the compiling, like microcontrollers that don't support an operating system. It has become more common to use this tool for paravirtualization where a system may have one or more platforms in use. Not targeted by this definition are source to source translators, which are often mistakenly called cross compilers.

 

for quiet exhaust... what is the best combo header downpipe with stock catback for a ss/sc???

 

I just want to say that this is actually my car....

YouTube - ‪08 Cobalt Sport Exhaust‬‏

i plan on getting the tsudo exhaust soon.. :P

 

Um... for quiet there's two routes you could go. You could go the cheaper route, Badmab header and ZZP Downpipe. Or the more expensive route, ZZP longtube header. Whichever you decide make sure you get the cat because catless will make it louder.


Here is a vid of the ZZP header and downpipe with the stock exhaust
Cobalt SS/SC Exhaust - YouTube

Hope that helps your decision.

 

I thought about the tsudo exhaust but iirc some people were having problems with their tsudo (muffler I believe).

 

Not sure if this will help at all, but here's a video of my exhaust setup. Car is a 2.4SS/NA running LSJ downpipe, with GMPP catback modded to dual outlet with a resonator delete.

Cobalt SS 2.4L Dual Outlet Exhaust With No Resonator - YouTube

 

Unfortunately I can't edit the op anymore. But yes that is helpful to those who would want to make a dual exhaust.

 

i wanna do the slp dual exhaust. but i cant even find it, even on the slp site! lil help herre plz(:

 

They no longer make it man. Only way you could get one is used. Sorry man.

 

Here's my addition I dunno how relevant this'll really be, but here ya go anyway

09 SS/TC w/ Badmab Catless 3" Downpipe, & SLP Loudmouth Dual Exhaust

SLP Loudmouth exhaust 09 Cobalt SS - YouTube

 

I have the slp loudmouth single exhaust if you decide to go that route

 

Thanks shake new vids are always welcome especially since it's on a LNF. Unfortunately I can't edit the op so I can't add to the main list. But thanks for the contribution!!

 

hmm, i was thinking, large resonator to custom side exit or underbody turn down for SS/SC? possibly the ZZP Whisper? how do you think that might sound?

 

loud and raspy

 

So I really want to get this megan racing muffler, do you guys know anything on it?? I mean it looks gorgeous and it should be a deeper noise not so high toned, correct? I want to keep it around 150 and under but have something that really adds some noise to the car. I already have an upgraded air intake, but nothing in the back. The stock ss non sc exhaust make a sad little noise. Just let me know whats up.


MU-MSPECII Megan Racing Stainless Steel Muffler - 4" TIT Tip w/ Real C.F. Body for 05-up Chevrolet Cobalt at Andy's Auto Sport

 

Bump. I plan on doing my exhaust come tax time. My plan so far is the ZZP header/downpipe combo. I plan to go with the 2.5 downpipe. I reaaaaally want the Corsa Touring Catback, but that's obviously not made anymore My next choice was the SLP Loudmouth II Dual Exit, which is also no longer made. What would be the next best choice? I'm looking for something with a nice "tone" at idle/city driving, but will really open up when I get on it on the highway etc. Any Ideas? Thanks!

And if it helps, car is an 06 LSJ.

 

Id say a super turbo muffler, but not sure how well thumps "open up" while WOT.

 

Right now the car has just a Magnaflow muffler on it. I want to go full cat-back. But I don't know if I want the whole Magnaflow cat-back, or if there is something that would sound better and almost be the same at the Corsa Touring..?

 

"Sound better" is all a matter of opinion of course, but the only thing I can think of that would sound like the touring is.the Sport... I'm pretty sure that it is also discontinued


If you want to try and keep the rasp away and keep it quiet, I recommend keeping a cat on the car, and getting as big of a resonator under there as possible(don't get a cherry bomb though, those just blow out lol)