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Old 08-31-2012, 01:57 AM   #1
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louder exhaust

As of right now my car has bbk long tube headers, a bbk o/r x and magnaflow catback exhaust. What can I do to make my exhaust louder. Take out the cats?
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Old 08-31-2012, 02:18 AM   #2
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Quote:
Originally Posted by bluegrassfever6
As of right now my car has bbk long tube headers, a bbk o/r x and magnaflow catback exhaust. What can I do to make my exhaust louder. Take out the cats?
I thought with longtubes you delete the cats??? Change you're catback and get slp loudmouths
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Old 08-31-2012, 03:54 AM   #3
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You shouldn't have any cats with a o/r x. Best you can do is delete the muff or replace with a bullet style muffler like the Loudmouths. But just a FYI with LTs and a o/r x your car will be absolutely ridiculously loud with no muffs. If you don't wanna attract any unwanted attention from police I would suggest not doing that. When I had my muffs deleted it was so loud as wot that it hurt my ears in the car with the windows down. I have the exact same setup as you except I'm cammed.
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Old 08-31-2012, 04:51 AM   #4
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[

Magnaflows are tame, get some spintechs. I love mine. They bark when i rev and scream if i open her up... Loudmouths sound like poop with no cats.
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Old 08-31-2012, 05:12 AM   #5
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I think they sound as good as flowmasters and increase performance by a billion. When I took my flows off I couldn't believe how bad they restrict the flow till I was forced to put them back on by Johnny Law. It was like someone put a chock hold on my car.
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Old 08-31-2012, 07:16 AM   #6
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Slp are nice but I think they take the sound of a true mustang away. They make a lot of popping sounds a high rpms. I have MAC I think they are louder than Flomasters. Try looking up bassani videos they're nice.
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Old 08-31-2012, 07:25 AM   #7
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Bassani's are just so ridiculously expensive though
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Old 08-31-2012, 08:07 AM   #8
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Originally Posted by t0t4lbl4ck0ut
Bassani's are just so ridiculously expensive though
Yea that's the problem
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Old 08-31-2012, 08:21 AM   #9
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Do you have Magnaflow Magnapacks? If not, they are louder than regular Magnaflow cat back setup. This setup would be stupid loud.
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Old 08-31-2012, 11:06 AM   #10
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Just get Magna packs and weld in place of your mufflers now. It would sound really good, I have 2 cats on mine still and no headers, and its still louder then my friends gt with straight pipes and flow masters.
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Old 08-31-2012, 11:45 AM   #11
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The area that I live in requires emissions testing and in order to pass you've gotta have cats. That's the reason I have them.
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Old 08-31-2012, 02:11 PM   #12
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Re: louder exhaust

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Originally Posted by bluegrassfever6 View Post
The area that I live in requires emissions testing and in order to pass you've gotta have cats. That's the reason I have them.
Then your car fails already... You don't have cats right now. Full length long tube headers with an offroad X or o/r x as you put it is exactly that for offroad use, as in NO cats. Putting cats back on it is only going to make it quieter, all you can do is change mufflers or loose them as well.
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Old 08-31-2012, 02:20 PM   #13
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Magnaflow CATBACK
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Old 08-31-2012, 02:30 PM   #14
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Old 08-31-2012, 02:51 PM   #15
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Re: louder exhaust

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Originally Posted by bluegrassfever6 View Post
As of right now my car has bbk long tube headers, a bbk o/r x and magnaflow catback exhaust. What can I do to make my exhaust louder. Take out the cats?
I went with BBK long tubes and the mid pipe and its loud....When you are kinda WO throttle have a kinda rattle in the mid pipe?
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Old 08-31-2012, 04:20 PM   #16
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It's just called a catback cause it starts right after the cats regardless of there being cats or not.
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Old 08-31-2012, 11:40 PM   #17
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I have cats currently. That's all I know. I don't know much about exhaust systems
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Old 09-01-2012, 07:31 AM   #18
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Quote:
Originally Posted by bluegrassfever6
I have cats currently. That's all I know. I don't know much about exhaust systems
If you have cats then you do not have an offroad x.

Removing those cats with an offroad pipe should make it a lot louder... Back pressure is good to have though. I'd just swap mufflers if you want a better sound.
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Old 09-01-2012, 11:07 AM   #19
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Re: louder exhaust

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Originally Posted by Brad.krieg View Post
If you have cats then you do not have an offroad x.

Removing those cats with an offroad pipe should make it a lot louder... Back pressure is good to have though. I'd just swap mufflers if you want a better sound.
Backpressure is NOT good to have.... No engine on this planet needs backpressure to run. All that does is hinder your performance hence why flowmaster mufflers suck so bad.
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Old 09-01-2012, 03:13 PM   #20
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Quote:
Originally Posted by Cobrarunnin9s

Backpressure is NOT good to have.... No engine on this planet needs backpressure to run. All that does is hinder your performance hence why flowmaster mufflers suck so bad.
Umm every car needs some form of backpressure to run to the best of its abilty... (Example; hook up a 3inch full exhaust to a honda prelude. That thing is goin to be loud and slow as hell.) all i'm saying is Some motors respond well with no restriction and some don't. Sometimes you need a little backpressure for optimal performance. Having a LITTLE backpressure is good to have in some cases. I say LITTLE because yes you still want a pretty free flowing exhaust. With his longtubes and catted x should be perfect. Also, Your not going to see much of a difference in muffler. Maybe 3-5hp max. Flowmasters aren't a bad muffler at all. Played out for sure. But still good none the less. They even make straight through designs. Its all about what you prefer.
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Old 09-01-2012, 07:41 PM   #21
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Backpressure isn't good. If it was, then why would cam manufacturers design cams with overlap? If the exhaust is trying to flow out but can't, because of the backpressure, then how would you benefit from that overlap? Putting a 3 inch exhaust won't solve the issue either because what you need is exhaust flow, if it's too big for the amount of air your engine is pushing then that defeats the purpose of that exhaust. Imagine trying to blow air through a straw and trying to blow air through one of those gift wrap tubes. The air may come out faster from the straw but it will take a lot of effort to do that.
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Old 09-01-2012, 09:01 PM   #22
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Re: louder exhaust

I was watching Gearz the other day and Stacey David said this about exhaust pipes , I don't have much experience with different sizes but I will be running a 2.5" duals all through in my exhaust when I finish it.

150hp 2" single pipe exhaust
250 - 350hp 2 1/2" single or dual exhaust
450+ hp 3" single or 2 1/2" dual exhaust
550+ hp 4" single or 3" dual exhaust

And keep in mind that on Gearz he mainly works on older Chevys. Those numbers might not be as true anymore due to modern advancements like 4V engines, Variable valve timing, variable intake manifolds, and computerized spark and timing.

But still it's a rough look at your question. Backpressure is a stupid arguement. But I really love the straw-vs.-gift wrap example JDF gave.

Here's some more information and great read:
http://www.pontiacstreetperformance....p/exhaust.html
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Old 09-01-2012, 09:17 PM   #23
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An engine has to have back pressure. No matter what y'all say it has to. If not, why not just run open heads? Why do ALL dragsters have headers if not more? Because an engine HAS TO HAVE BACK PRESSURE.
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Old 09-01-2012, 10:15 PM   #24
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Quote:
Originally Posted by 86 muscle
An engine has to have back pressure. No matter what y'all say it has to. If not, why not just run open heads? Why do ALL dragsters have headers if not more? Because an engine HAS TO HAVE BACK PRESSURE.
Umm because running open heads would light sh!+ in the engine bay on fire. Exhaust systems are on cars to direct where the gasses travel not because they are needed to create back pressure.
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Old 09-01-2012, 10:29 PM   #25
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Quote:
Originally Posted by 86 muscle
An engine has to have back pressure. No matter what y'all say it has to. If not, why not just run open heads? Why do ALL dragsters have headers if not more? Because an engine HAS TO HAVE BACK PRESSURE.
It comes back to the cam overlap part. when the exhaust and intake valves are both open then that creates a vacuum in the combustion chamber which draws in the intake charge. It's a much more efficient way to draw he air in. If it had back pressure then there would be no vacuum and you would just be mixing exhaust with the intake charge. An engine that breathes better runs better. Imagine of you were trying to take a breath through your mouth, you exhale and then inhale, but what if half of the air you inhaled was actually the carbon dioxide you were trying to exhale?
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Old 09-01-2012, 10:54 PM   #26
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Haha, ok.....
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Old 09-01-2012, 10:57 PM   #27
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That's what I've learned from my experiences. Take it or leave it.
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Old 09-01-2012, 10:58 PM   #28
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Re: louder exhaust

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That's what I've learned from my experiences. Take it or leave it.
+1
I can dig it.
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Old 09-01-2012, 10:59 PM   #29
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Originally Posted by ColeJohnson

+1
I can dig it.
+1 same
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Old 09-01-2012, 11:01 PM   #30
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Re: louder exhaust

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Originally Posted by bluegrassfever6 View Post
As of right now my car has bbk long tube headers, a bbk o/r x and magnaflow catback exhaust. What can I do to make my exhaust louder. Take out the cats?
And just a tip... An "x-pipe" isn't "o/r" unless it has no catalytic converters. If you still have cats then you have a restricted x-pipe.

Losing the cats will gain you a bit of volume, but more so will benefit air flow.

The big way to gain volume would be to trade out those magnaflows for SLP products, MAC, or Flowmaster. Those three brands are generally the loudest.
And if money is no matter then Bassani catback is loud and PURE SEX. However it's big money compared to the others.
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Old 09-01-2012, 11:17 PM   #31
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I'm just really confused. When I look at what's on my car on American muscle. I have the bbk off road x pipe. There are no cats. Then I look at the Magnaflow exhaust kit that I have. and that's where the cats are. They are after the resonators.
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Old 09-01-2012, 11:40 PM   #32
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Re: louder exhaust

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I'm just really confused. When I look at what's on my car on American muscle. I have the bbk off road x pipe. There are no cats. Then I look at the Magnaflow exhaust kit that I have. and that's where the cats are. They are after the resonators.
Magnaflow catbacks should not have cats... That's why it's a "catback." It starts after the cats and is the rest of the exhaust system.
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Old 09-01-2012, 11:44 PM   #33
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Quote:
Originally Posted by bluegrassfever6
I'm just really confused. When I look at what's on my car on American muscle. I have the bbk off road x pipe. There are no cats. Then I look at the Magnaflow exhaust kit that I have. and that's where the cats are. They are after the resonators.
If you can post up a picture that would be great
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Old 09-02-2012, 12:10 AM   #34
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(Stroke stroke) yeah for sure
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Old 09-02-2012, 12:14 AM   #35
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Never mind
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