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Safe to run no catback?

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Old Jan 6, 2017 | 09:14 PM
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Default Safe to run no catback?

Trading my catbacks with someone else, we are both shipping to each other. Is it safe to run the car with no catbacks until it arrives? Has long tubes and o/r x. Thanks!
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Old Jan 6, 2017 | 09:32 PM
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Originally Posted by crazykyle709
Trading my catbacks with someone else, we are both shipping to each other. Is it safe to run the car with no catbacks until it arrives? Has long tubes and o/r x. Thanks!
if you're asking to drive with no mufflers, then I say yes it totally perfect and you may love the sound.

I drive without mufflers, well actually 1 fell off and I cut the other off.
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Old Jan 6, 2017 | 09:35 PM
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Originally Posted by crazykyle709
Trading my catbacks with someone else, we are both shipping to each other. Is it safe to run the car with no catbacks until it arrives? Has long tubes and o/r x. Thanks!
Problem could be it would make the motor run leaner. Increase combustion temps.. The factory tune is rich by design. so that would help... but I would not run it very long... or at sustained speeds. the car wont blow up but the increase with put a nail in the longevity column. Then there is the Carbon monoxide issue. deadly especially in the winter. "Be careful who you listen to here ". This could be a deadly action under the right circumstances. Everything is a trade off. Also Illegal anywhere where emissions are regulated.

Bill aka ET

Last edited by Evil-Twin; Jan 6, 2017 at 09:40 PM.
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Old Jan 6, 2017 | 09:51 PM
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Do you have to drive the car? It would be way loud on top of other issues already pointed out. I test drove one with an exhaust leak and the drone was unbearable, I could not believe the dealer let me drive it like that
awful sounding.
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Old Jan 6, 2017 | 09:53 PM
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Originally Posted by Evil-Twin
Problem could be it would make the motor run leaner. Increase combustion temps.. The factory tune is rich by design. so that would help... but I would not run it very long... or at sustained speeds. the car wont blow up but the increase with put a nail in the longevity column. Then there is the Carbon monoxide issue. deadly especially in the winter. "Be careful who you listen to here ". This could be a deadly action under the right circumstances. Everything is a trade off. Also Illegal anywhere where emissions are regulated.

Bill aka ET
Thanks for the info! There is no piping after the O/R x pipe that is installed since I'm shipping him the whole catback. The farthest I would see myself driving in one run is 30 minutes. As soon as I get his exhaust (I'm hoping by the end of next week but it could be a little longer) I'll be installing it. Plus no emissions where I live so I don't think I'll be bothered.

Last edited by crazykyle709; Jan 6, 2017 at 09:57 PM.
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Old Jan 6, 2017 | 09:54 PM
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Originally Posted by Forcedvert
Do you have to drive the car? It would be way loud on top of other issues already pointed out. I test drove one with an exhaust leak and the drone was unbearable, I could not believe the dealer let me drive it like that
awful sounding.
Car is my daily driver but I'm off of school right now so the only places I'm going is short runs and an occasional trip to the town. I have droven it around town a little and it's insanely loud and drone is trying to kill my ears lol. But I can live with it since it's only for 1-2 weeks.

Originally Posted by Nurburgring
if you're asking to drive with no mufflers, then I say yes it totally perfect and you may love the sound.

I drive without mufflers, well actually 1 fell off and I cut the other off.
There is no piping after the O/R x pipe since I'm shipping him mine. So it's pretty much straight piped with absolutely no catback piping/muffler. Sounds pretty gnarly drones pretty much constantly.

Last edited by crazykyle709; Jan 6, 2017 at 09:56 PM.
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Old Jan 6, 2017 | 10:07 PM
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Why 1 to 2 weeks? you can ship it anywhere in the country from coast to coast in 1 week? I've seen porcelain insulators on spark plugs melt because of increased combustion temps. Get his first then send yours. or rent a car for a week, about 100 dollars, if you rent a compact just for transportation. Just offering some alternatives.
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Old Jan 6, 2017 | 10:17 PM
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Default One other thought

IM giving you the worst case scenario, these are factual effects under certain circumstances, but not all circumstances. Many people burry their head with the possibilities of negative effects. My stance here on this forum is to at least know the potential of an action like this.. I am not saying these will happen but don't dismiss them as not happening.
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Old Jan 6, 2017 | 10:46 PM
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Originally Posted by Evil-Twin
Why 1 to 2 weeks? you can ship it anywhere in the country from coast to coast in 1 week? I've seen porcelain insulators on spark plugs melt because of increased combustion temps. Get his first then send yours. or rent a car for a week, about 100 dollars, if you rent a compact just for transportation. Just offering some alternatives.
We planned on shipping yesterday but I guess in Maryland where he lives he didn't get to ship today as planned. Could possibly ship tomorrow if he gets off work early enough. I already uninstalled mine yesterday thinking we would be doing everything yesterday. If we are able to ship tomorrow then I should get it sometime next week. I'll defiantly be limiting my driving until its here. If I need to go anywhere I can most likely use my fiancees car. Thanks for all the info!
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Old Jan 7, 2017 | 01:27 AM
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Your rear leaf spring is fiberglass. It may not like the hot & cold cycles you are going to put it through. Others have had this problems with their exhaust dumps.
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Old Jan 8, 2017 | 10:46 PM
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Originally Posted by crazykyle709
We planned on shipping yesterday but I guess in Maryland where he lives he didn't get to ship today as planned. Could possibly ship tomorrow if he gets off work early enough. I already uninstalled mine yesterday thinking we would be doing everything yesterday. If we are able to ship tomorrow then I should get it sometime next week. I'll defiantly be limiting my driving until its here. If I need to go anywhere I can most likely use my fiancees car. Thanks for all the info!
im going on two years with no mufflers, sounds bad to the bone and ZERO issues.

Btw I will take it for smog without the muffler, just to see if I pass since they didn't even look at mufflers. Think I'll pass with the ziptie mod??
​​​​
going on 2 years with no mufflers in California! Next major mod will be no cats and long tubes.
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Old Jan 9, 2017 | 12:50 AM
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The good thing about this forum is the level of competence of its members... some people are so talented, resourceful, and helpful, while others are hacks, incompetent, and willing to offer horrible guidance.

Now let's see... IM driving down the road and my muffler falls off.
Common sense would dictate that I get it fixed since it plays an intricate part in the tune, safety, and compliance of my car.

Now for others, common sense, is not so common and does not play into it for them.. so what do they do? They hack off the other one muffler.... certainly not something many of us would do, but then again, that's why this forum is good, you get to see who you should listen too and who you should be careful not to listen too. Its anyones choice.

Without mufflers, as most would know, causes nothing but drone, a horrible frequency response that is not neutralized by proper exhaust tuning, to which mufflers are the most important part. Yet some members say " That it is Bad ***"... of course everyone has a right to their opinion.

For me, If my muffle fell off, my first thought would be , why did it fall off in the first place. My next thought would be to fix it as soon as possible since my exhaust note is something that I chose to make.

IM not trashing anyone here, just offering my thoughts on advice given here... so when I tell newbies to this forum and Sat " Be Very Careful who you listen to " these are the situations where people are 180* degrees apart.. Usually when someone gives bad advice, they always give it... So for the newbies , use common sense to decide who you want to listen to, look at their credentials, and their input, then make a conscious decision to gather a list of competent advice givers. There are some really great and talented and professional members here with good advice that are willing to share. Unfortunately, there are a lot of members whos advice is very questionable. If you want to gather a list of those " Not to listen too " you can make a list of ET haters who constantly stalk me, and take every opportunity to discredit my advice.. only because they can.

Most people will tell you its not a good idea to run around without mufflers, but there are some who will tell you that if your mufflers fall off, its plus because it sounds bad ***.

Bill aka ET
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Old Jan 9, 2017 | 11:04 AM
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Originally Posted by Sydwayz
Your rear leaf spring is fiberglass. It may not like the hot & cold cycles you are going to put it through. Others have had this problems with their exhaust dumps.
You are correct on that one. There is a member here who ran with no mufflers and broke his leaf spring from the heat and I believe he also melted some of the transmission wires. On top of that you also have your transmission right at the area of the flange and I would think that having exhaust spewing out it would heat up your transmission as well.

Me personally I would not drive it at all until he can put the exhaust back on.
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Old Jan 9, 2017 | 11:24 AM
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Originally Posted by midnight01
You are correct on that one. There is a member here who ran with no mufflers and broke his leaf spring from the heat and I believe he also melted some of the transmission wires. On top of that you also have your transmission right at the area of the flange and I would think that having exhaust spewing out it would heat up your transmission as well.

Me personally I would not drive it at all until he can put the exhaust back on.


I recall it did serious damage to the leaf. You need to do a downturn end pipe to dump the exhaust straight down at least.

No louder than with cut outs. Still damn loud, though.
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Old Jan 9, 2017 | 02:26 PM
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Originally Posted by 66dts-v


I recall it did serious damage to the leaf. You need to do a downturn end pipe to dump the exhaust straight down at least.

No louder than with cut outs. Still damn loud, though.
i don't feel it's that loud. Yes it drones around 1500 rpm but it's no biggie since it smooths out and won't notice it much anyways.

I chopped my mufflers at the rest sway bar and I like the sound I'm getting.

Good luck!
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Old Jan 9, 2017 | 02:39 PM
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For a week or two you shouldn't have any issues, I started to melt my tr6060 trans mounts on mine so I had to make some turn downs till I get the cat back, back on. After you drive it for a couple days I'd at least take a look underneath just to make sure everything looks ok.

I have b&b bullets and my A/F didn't change without them.
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Old Jan 9, 2017 | 03:37 PM
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Originally Posted by Nurburgring
i don't feel it's that loud. Yes it drones around 1500 rpm but it's no biggie since it smooths out and won't notice it much anyways.

I chopped my mufflers at the rest sway bar and I like the sound I'm getting.

Good luck!
How old are you bud?
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To Safe to run no catback?

Old Jan 9, 2017 | 03:38 PM
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Originally Posted by Nurburgring
i don't feel it's that loud. Yes it drones around 1500 rpm but it's no biggie since it smooths out and won't notice it much anyways.

I chopped my mufflers at the rest sway bar and I like the sound I'm getting.

Good luck!
I had the borla straight pipes and after 4 months I could not take the loudness anymore. Even after installing an xpipe. straight pipes sounded cool on my 72 camaro ss, and my other older cars but in my opinion sounds like crap on these newer motors especially since the firing order is different. Pairing that with no cats and longtubes you might as well purchase stock in hearing aids now.
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Old Jan 9, 2017 | 03:52 PM
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Originally Posted by Sydwayz
How old are you bud?
LOL, how intuitive.
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Old Jan 9, 2017 | 04:01 PM
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Originally Posted by Nurburgring
i don't feel it's that loud. Yes it drones around 1500 rpm but it's no biggie


Good luck!
Can you imagine cruising at 1500 rpm for an hour going to the beach, or just a cruise, and having to put up with that done and its visceral vibration? For some, it's no biggie. That would make me "NOT" want to go to the beach , or a highway cruise. And drone on an LSX motor occurs in a 400 rpm range, meaning anywhere from and including 1400 to 1800 rpm.

I don't doubt that some like it... some people like to have their nose, lips and eyebrows pierced too.

Just an observation in the attempt to discuss this issue.

Bill aka ET
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