cat or no cat that is the quiestion?
10-28-2010, 01:28 AM
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cat or no cat that is the quiestion?
Like the topic says cat or no cat I have a sub 3 inch pulley intake 42# inj gmc performance exhaust header front mount hear exchanger (do those come stock) so I was wondering if I would notice difference over having one..also could it cause problems..also could I run race fuel and do they make a throttle body spacer I like the sound they make
10-28-2010, 02:15 AM
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I am catless. Sounds fine. Not raspy. Not any louder than any other exhaust. A cat hardly resonates/muffles sound. That would the job of the resonator and muffler. A cat does not change sound as much as you think, despite what you hear, or what people tell you. I can personally say it does not. I noticed hardly any difference.
People will say that it makes it raspy, tin sounding, etc. Here's an idea.. Maybe it's that cheap ass chinese pot metal under your car that you call an "exhaust". And maybe you didn't notice it until you got an aftermarket DP.. You ever think of that?! Of course not.. It's much easier to say it sounds like **** because it has no cat..
God damn people are so easy to assume ****.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
10-28-2010, 09:55 AM
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i am going catless, it has been ordered, should arrive very soon... i will let you know the diff as soon as i install... remember i am also dual exits so if there is a huge sound change i will definately know hahahaha.... i assume it is like lsj says it wont make much diff in sound just hp...
10-28-2010, 10:03 AM
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Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
I can, if you have a ss/tc, personally attest to the only time the exhaust getting loud without a cat is on WOT. That is, if you still have the stock catback. The turbo actually acts as a fairly good muffler. You can't even hear the car while cruising.
10-28-2010, 10:10 AM
#7
My experience with downpipes :
zzp catless + gmpp touring exhaust on wot = Raspy- Highpitched tone.
zzp catless w/vibrant resonator on wot = Really aggressive sound, I loved it.
zzp catted downpipe on wot = sounds deep and loud, purrs while cruising " my current setup and it sounds amazing "
Oh btw i switched like 5 downpipes on my car in the last year and im satisfied with the last setup
zzp catless + gmpp touring exhaust on wot = Raspy- Highpitched tone.
zzp catless w/vibrant resonator on wot = Really aggressive sound, I loved it.
zzp catted downpipe on wot = sounds deep and loud, purrs while cruising " my current setup and it sounds amazing "
Oh btw i switched like 5 downpipes on my car in the last year and im satisfied with the last setup
10-28-2010, 10:31 AM
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So keep the resonator but no cat but will it sound raspy with the gm performance exhaust. And it has no negative side effects of no cat..... and could I run race fuel in the cobalt.... has anyone ran race fuel
10-28-2010, 12:50 PM
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Yes. You need a tune, otherwise you're wasting a precious $6.50 for each gallon that you pump in your car.
Another thing you have to take into consideration is the exhaust manifold. Typically a long(er)-tube exhaust manifold setup will quiet down exhaust note. Check out the OTTP setup, or the ZZP one when it is released. Personally I'd choose ZZP.
Just another something to look into.
10-28-2010, 02:06 PM
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Do not go 3" cat-back. There is absolutely no point, and it will sound like total ass.
10-28-2010, 02:58 PM
#14
Not true.
I am catless. Sounds fine. Not raspy. Not any louder than any other exhaust. A cat hardly resonates/muffles sound. That would the job of the resonator and muffler. A cat does not change sound as much as you think, despite what you hear, or what people tell you. I can personally say it does not. I noticed hardly any difference.
People will say that it makes it raspy, tin sounding, etc. Here's an idea.. Maybe it's that cheap ass chinese pot metal under your car that you call an "exhaust". And maybe you didn't notice it until you got an aftermarket DP.. You ever think of that?! Of course not.. It's much easier to say it sounds like **** because it has no cat..
God damn people are so easy to assume ****.
Not true.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
I am catless. Sounds fine. Not raspy. Not any louder than any other exhaust. A cat hardly resonates/muffles sound. That would the job of the resonator and muffler. A cat does not change sound as much as you think, despite what you hear, or what people tell you. I can personally say it does not. I noticed hardly any difference.
People will say that it makes it raspy, tin sounding, etc. Here's an idea.. Maybe it's that cheap ass chinese pot metal under your car that you call an "exhaust". And maybe you didn't notice it until you got an aftermarket DP.. You ever think of that?! Of course not.. It's much easier to say it sounds like **** because it has no cat..
God damn people are so easy to assume ****.
Not true.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
These setups were all connected to the OEM resonator and muffler, by the way. As usual though, the noobs will come on here with their hot rod Cobalts that the bank probably owns and hound away at the keyboard angrily in denial over their own nonsense claims with no actual supporting evidence to back themselves with.
Last edited by chris88z24; 10-28-2010 at 03:05 PM.
10-28-2010, 03:18 PM
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You're in ricer denial. I've had OEM exhaust, catless, Vibrant bullet resonator in place of cat, ZZP midlength with ceramic core cat, and ZZP midlength with ceramic spun cat. There's a HUGE difference with a converter on there. Assuming? Hardly. Go back and do your research before embarrassing yourself again with another falsely informed post.
These setups were all connected to the OEM resonator and muffler, by the way. As usual though, the noobs will come on here with their hot rod Cobalts that the bank probably owns and hound away at the keyboard angrily in denial over their own nonsense claims with no actual supporting evidence to back themselves with.
These setups were all connected to the OEM resonator and muffler, by the way. As usual though, the noobs will come on here with their hot rod Cobalts that the bank probably owns and hound away at the keyboard angrily in denial over their own nonsense claims with no actual supporting evidence to back themselves with.
Listen. I am telling you, I honestly cannot tell an audible difference. A lot of the sound you are describing is the cat-back. The muffler and resonator have MUCH more to do with exhaust note, than the cat.
Let me say it again - "People will say that it makes it raspy, tin sounding, etc. Here's an idea.. Maybe it's that cheap ass chinese pot metal under your car that you call an "exhaust". And maybe you didn't notice it until you got an aftermarket DP.. You ever think of that?! Of course not.. It's much easier to say it sounds like **** because it has no cat.."
I own my car, paid in cash. Thanks. I can show you receipts if you'd like. You're the one assuming things. Lol!
You can get a quieter exhaust than stock, you do know this right? Like I said.. MUFFLER AND RESONATOR..
You're not speaking very well for this forum..
10-28-2010, 03:25 PM
#16
Right, because personal experience/research > hearsay assumptions. I've owned my car for over 3 years, [scooped it up from the showroom floor at a local dealership and paid in cash, too] and have had MANY different exhaust setups under it. Trust me when I say that the catalytic converter plays a role in toning down the exhaust note, which is nothing more than sound waves travelling through the exhaust pipe. Peer inside of a catalytic converter, actually YELL into a catted and non-catted downpipe, and tell me that there isn't a difference in sound. 
You've been active on this forum for 12 days and have 66 posts, all of which are mostly just you typing about random nonsense that you have no clue about. Forums work best when you sit back, search, and read about what it is that you joined the forum to learn about. Feel free to ask questions (like the OP has done).
Have you ever attended college? Do you walk into the classroom on the first day and start telling everybody how things are run? Of course not, because your ass would have been kicked to the ******* curb (more figuratively these days than literally). The same principle works on the internets (although most are too dumb to grasp the concept). We've done things here and have learned from them, and have posted about it for others to read and learn about, too. So read up, you'll probably learn a thing or two anyways.
You've been active on this forum for 12 days and have 66 posts, all of which are mostly just you typing about random nonsense that you have no clue about. Forums work best when you sit back, search, and read about what it is that you joined the forum to learn about. Feel free to ask questions (like the OP has done).
Have you ever attended college? Do you walk into the classroom on the first day and start telling everybody how things are run? Of course not, because your ass would have been kicked to the ******* curb (more figuratively these days than literally). The same principle works on the internets (although most are too dumb to grasp the concept). We've done things here and have learned from them, and have posted about it for others to read and learn about, too. So read up, you'll probably learn a thing or two anyways.
10-29-2010, 01:26 AM
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Right, because personal experience/research > hearsay assumptions. I've owned my car for over 3 years, [scooped it up from the showroom floor at a local dealership and paid in cash, too] and have had MANY different exhaust setups under it. Trust me when I say that the catalytic converter plays a role in toning down the exhaust note, which is nothing more than sound waves travelling through the exhaust pipe. Peer inside of a catalytic converter, actually YELL into a catted and non-catted downpipe, and tell me that there isn't a difference in sound.
You've been active on this forum for 12 days and have 66 posts, all of which are mostly just you typing about random nonsense that you have no clue about. Forums work best when you sit back, search, and read about what it is that you joined the forum to learn about. Feel free to ask questions (like the OP has done).
Have you ever attended college? Do you walk into the classroom on the first day and start telling everybody how things are run? Of course not, because your ass would have been kicked to the ******* curb (more figuratively these days than literally). The same principle works on the internets (although most are too dumb to grasp the concept). We've done things here and have learned from them, and have posted about it for others to read and learn about, too. So read up, you'll probably learn a thing or two anyways.
You've been active on this forum for 12 days and have 66 posts, all of which are mostly just you typing about random nonsense that you have no clue about. Forums work best when you sit back, search, and read about what it is that you joined the forum to learn about. Feel free to ask questions (like the OP has done).
Have you ever attended college? Do you walk into the classroom on the first day and start telling everybody how things are run? Of course not, because your ass would have been kicked to the ******* curb (more figuratively these days than literally). The same principle works on the internets (although most are too dumb to grasp the concept). We've done things here and have learned from them, and have posted about it for others to read and learn about, too. So read up, you'll probably learn a thing or two anyways.
I stopped reading at "You have been on this forum for 12 days and have 66 posts.."You can take your ignorance and blow it out your ass you ignorant *****. Have fun with your catted setup and all of your incoherent, asinine, assumptions.
This is why this forum sucks, because of people like you. You could have just stopped and said - "Maybe you don't notice the difference, but to me if is quite prevalent.", and maybe respect the fact that "What sounds good" differs between each and every person, but no. You had to pull out your monster e-**** and attempt to be Mr. Hot Shot.
Congratulations, I hope you can sleep tonight.
Oh and just because I'm new here doesn't mean I'm new to the platform. I've been around it since day one. Talk about "Walking in and telling someone like it is." Moron.
10-29-2010, 08:51 AM
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From my experience with modding several different cars, the cat does cost you a little top end (i have always gained trap speed from ditching it), but it also controls the actual volume of the exhaust. The Muffler and resonator control the tone, not the volume AS much (not saying it has zero impact). Of course you can buy mufflers that cancel out all the noise, but if you remove the cat the same muffler it will sound the same, but it WILL get louder.
Anyway, removing it will do a few things. It will make the car louder, gain a few horses, and smell like ****. The last thing is why I left mine on this time. I just hate to smell like gas every time I walk behind my car while its running. It comes down to personal preference, OP. Try both and decide for yourself. Just make sure you have the cat tuned out so you don't throw a code.
Anyway, removing it will do a few things. It will make the car louder, gain a few horses, and smell like ****. The last thing is why I left mine on this time. I just hate to smell like gas every time I walk behind my car while its running. It comes down to personal preference, OP. Try both and decide for yourself. Just make sure you have the cat tuned out so you don't throw a code.
10-29-2010, 09:10 AM
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Not true.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.[/QUOTE]
I had it happen to me when I lived in Florida, the cop DID look under the car and DID write a warning ticket. Both I and the muffler shop that cut my cat off received a letter from the EPA 2-days later. Just because you haven't heard of it doesn't mean it has not happen. You can take your foot out of your big mouth now.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.[/QUOTE]
I had it happen to me when I lived in Florida, the cop DID look under the car and DID write a warning ticket. Both I and the muffler shop that cut my cat off received a letter from the EPA 2-days later. Just because you haven't heard of it doesn't mean it has not happen. You can take your foot out of your big mouth now.
10-29-2010, 09:18 AM
#23
Not true.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
Most states do have emissions, but inside each state, is a county, and inside of each county, a town.
My town does not have emissions. This does not mean that it is legal for me to run catless. However, no emissions means I will have zero reason for my car to be inspected. And I've never seen/heard of an officer physically looking for a cat under a car. Period end of story.
[/QUOTE]It is almost impossible to see the cat on a Cobalt. Especially if you just look under the car for it.
I'm not saying its right or wrong to have a cat. Just saying I highly doubt the cop new what he was looking at.
10-29-2010, 09:29 AM
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I had it happen to me when I lived in Florida, the cop DID look under the car and DID write a warning ticket. Both I and the muffler shop that cut my cat off received a letter from the EPA 2-days later. Just because you haven't heard of it doesn't mean it has not happen. You can take your foot out of your big mouth now.
I'm not saying its right or wrong to have a cat. Just saying I highly doubt the cop new what he was looking at.[/QUOTE]
I wasn't the Balt; it was an 85 Chrysler Turbo Laser. He did know what to look for, hence the warning ticket.
10-29-2010, 09:47 AM
#25
Ok. That makes more sense.
P.S. What the hell is going on with the quote button today?? It only quotes a portion of the post.