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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 04-05-2009, 11:12 PM   #1
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Where to place the Cut-Out

Just curious, where would the ideal place to put an electric exhaust cut-out be?

Lets say the goal of the cut-out is not power gain, but sound, a nice deep V8 burble for when ur cruising down to road or something.

I would imagine that having a pair of cut-outs after the headers/manifolds would be the loudest, especially after a set of long tubes, but how bad would the interior drone be? Would you be better off having the cutouts closer to the back of the car, say just before the mufflers...would you still have good sound back there, and less interior drone as well?
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Old 04-05-2009, 11:20 PM   #2
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You have to place them after the O2 sensors. That means after the 1st resonator if you do not want to move the sensors.
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Old 04-05-2009, 11:32 PM   #3
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how much of a sound decrease will the resonators cause? Obviously they reduce drone (resonant sound) but how will they affect the overall note of the exhaust?

Essentially my question is this

1. After the Resonator
2. Just before the Muffler
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Old 04-05-2009, 11:35 PM   #4
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You are planning to put cut-outs on the car for sound?
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Old 04-05-2009, 11:37 PM   #5
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Well, i dont want to do a full exhaust mod, as it will be my DD, so i prefer to have the option of a quiet exhaust. But when the mood is right, id like to open up the exhaust cutout's to hear that puppy roar

(i drove a fiends '00 camaro, with a cutout just before the muffler, and it sounded nice)
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Old 04-05-2009, 11:40 PM   #6
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It will drive you less crazy the farther back you put it. If all you care about is sound, then place them to the back of the floorpan.
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Old 04-06-2009, 12:01 AM   #7
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so i wont loose much of the sound my placing them further back?
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Old 04-06-2009, 12:06 AM   #8
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Heck no. If you want it to sound good to YOU, you should put the cut-outs behind you, not ahead or underneath you. I hate the feeling of the floor vibrating directly underneath me and the sound of the exhaust right underneath my door when I am driving around with the window down.
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Old 04-06-2009, 12:07 AM   #9
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Cool, so as far back as possible for good sound...ill keep that in mind...now, one small problem remains....getting the car...lol
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Old 04-06-2009, 12:58 AM   #10
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i have mine dumped right off the cat just in front of the passengers feet in my truck right now and it is crazy loud and fun for short little spirted drives, but the drone inside is horrible for long trips. but i got a pretty loud system that takes care of that lol
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Old 04-06-2009, 02:12 AM   #11
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I plan on getting electronic cut-outs too and plan on placing them just before the mufflers. I live in a townhouse community and don't want it being too loud when I'm coming and going. Once I get it on the street, I'll open them up and let her scream.
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Old 04-06-2009, 02:15 AM   #12
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You'll get a lot more popping when you decelerate if they are placed too far forward.
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Old 04-06-2009, 03:07 AM   #13
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You'll get a lot more popping when you decelerate if they are placed too far forward.
yup
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Old 04-06-2009, 11:44 AM   #14
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I would suggest you get the one with a motor and remote that opens it.

You don't want exhaust gas under the car at a stop it can waft up into the cabin. Very dangerous.

I forget the URL but have seen it in a few vettes. You press the button and instant open headers. If you have half it will open half. Then closed and it's normal exhaust. Ultimate stealth for road killz.
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Old 04-06-2009, 12:36 PM   #15
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http://www.quicktimeperformance.com/

There's others out there, that's just the one off the top of my head.

I like the idea of having a decent stock or slightly modified exhaust note, and then opening them up and scaring all the little imports away

Edit: After the cutout, do you run a turn-down off the cut-out, or just leave it like it is?
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Old 04-06-2009, 12:38 PM   #16
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You'll get a lot more popping when you decelerate if they are placed too far forward.
This is true! The closer to the headers the worse it sounds. Open headers make the car sound like shi*/cheap old truck. there is no room any where right before the exhaust. With the x-pipe you are going to need 2. The best place to but them is right before the rear axle or before the pipes bend up over the axle. any forward will be annoying. And exhaust leaking up into the cabin is not only unsafe im sure you dont want ur car smelling like exhaust.

If you have them with manifolds there will be more droning and a deeper sound. not as loud. If you have them with longtubes it will have more of a higher raspy pitch, like a nascar.

Also if you plan on having them open for most of the time the important thing to do is get your car tuned for them other wise ur not getting the potential out of your car. being that this will be your daily driver is no reason to ignore getting an aftermarket exhaust for the extra horses. There are plenty of aftermarket exhaust that are not loud that improve the same gains. If your planning on doing Longtubes and cut out its a good idea to spend a lil extra on just getting full exhaust. Btw you dont have to spend a grand on exhaust in fact if you do your paying too much!!
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Old 04-06-2009, 12:44 PM   #17
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do a youtube search with LT's and cutout for ls3 or any LS model the sound is going to be around the same! unless you add a cam
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Old 04-06-2009, 01:08 PM   #18
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This is true! The closer to the headers the worse it sounds. Open headers make the car sound like shi*/cheap old truck. there is no room any where right before the exhaust. With the x-pipe you are going to need 2. The best place to but them is right before the rear axle or before the pipes bend up over the axle. any forward will be annoying. And exhaust leaking up into the cabin is not only unsafe im sure you dont want ur car smelling like exhaust.

If you have them with manifolds there will be more droning and a deeper sound. not as loud. If you have them with longtubes it will have more of a higher raspy pitch, like a nascar.

Also if you plan on having them open for most of the time the important thing to do is get your car tuned for them other wise ur not getting the potential out of your car. being that this will be your daily driver is no reason to ignore getting an aftermarket exhaust for the extra horses. There are plenty of aftermarket exhaust that are not loud that improve the same gains. If your planning on doing Longtubes and cut out its a good idea to spend a lil extra on just getting full exhaust. Btw you dont have to spend a grand on exhaust in fact if you do your paying too much!!
Hmm... I've noticed that too. I have my QTEC (Quick Time Electric Cutout - by QTP) mounted where the plates go in my Borla CB and noticed the drone with manifolds IS more than with LTs. The LTs are just plain louder, but I like the sound better.

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http://www.quicktimeperformance.com/

There's others out there, that's just the one off the top of my head.

I like the idea of having a decent stock or slightly modified exhaust note, and then opening them up and scaring all the little imports away

Edit: After the cutout, do you run a turn-down off the cut-out, or just leave it like it is?
There's something like DFM or something like that too. I would kinda' stray away from butterfly cutouts, at least like my QTEC (again, the QTP cutout). It doesn't seal great, and I don't really care about it because the exhaust just goes out that leg of the CB, but if you're planning on dumping under the car, I think the noise will be more apparent and eventually, more irritating. I'd definately put a turndown in, for sure, but, like was already mentioned, be worried about exhaust gas.

Hey Hilton - regarding the resonator you mentioned, are you talking about the ones near the center of the car, or just aft of the manifolds? I can't tell if we have four cats', but could swear I remember reading the car actually has two cats', so I'm wondering if the other pair I've seen are just pup cats' or indeed resonators. I'm a little confused about what they are supposed to be. I wonder, though, if putting the cutouts closer to the 02s, like no less than 13-inches or so, would be okay too. I know that having the 02s exposed to open air can screw with them, but know of many who run them not far past header collectors; I'm just wondering. I don't plan on going this route - just curious
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Old 04-06-2009, 01:44 PM   #19
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Hate to hijack the thead, but Sauce...that Camaro in your sig is sexy as hell. I hope we see the aftermarket coming out with stuff like that
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Old 04-06-2009, 01:55 PM   #20
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Hmm... I've noticed that too. I have my QTEC (Quick Time Electric Cutout - by QTP) mounted where the plates go in my Borla CB and noticed the drone with manifolds IS more than with LTs. The LTs are just plain louder, but I like the sound better.



There's something like DFM or something like that too. I would kinda' stray away from butterfly cutouts, at least like my QTEC (again, the QTP cutout). It doesn't seal great, and I don't really care about it because the exhaust just goes out that leg of the CB, but if you're planning on dumping under the car, I think the noise will be more apparent and eventually, more irritating. I'd definately put a turndown in, for sure, but, like was already mentioned, be worried about exhaust gas.

Hey Hilton - regarding the resonator you mentioned, are you talking about the ones near the center of the car, or just aft of the manifolds? I can't tell if we have four cats', but could swear I remember reading the car actually has two cats', so I'm wondering if the other pair I've seen are just pup cats' or indeed resonators. I'm a little confused about what they are supposed to be. I wonder, though, if putting the cutouts closer to the 02s, like no less than 13-inches or so, would be okay too. I know that having the 02s exposed to open air can screw with them, but know of many who run them not far past header collectors; I'm just wondering. I don't plan on going this route - just curious
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http://www.dmhperformance.com/ecutout.htm
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Old 04-06-2009, 05:22 PM   #21
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Hate to hijack the thead, but Sauce...that Camaro in your sig is sexy as hell. I hope we see the aftermarket coming out with stuff like that
dont really care for the front clip. I just like how she sets on her feet
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Old 04-06-2009, 05:31 PM   #22
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THAT'S IT!!! Thanks Milk'

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dont really care for the front clip. I just like how she sets on her feet
That's a bad@$$ sig'

I forget who another company is, but there's one that I remember that has a sliding cutout that it would seem would leak less, if any at all. I'm not sure how the DMHs are, but I recall hearing really good things about them. I know QTP has a bunch of little add-ons and such but I just want a cutout that doesn't leak, and opens and closes reliably when I want it to. The closer it is to the manifold, the better, power-wise, but you gotta' watch those 02s.
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Old 04-06-2009, 05:38 PM   #23
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Old 04-06-2009, 06:34 PM   #24
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http://www.camaro5.com/forums/showth...&highlight=cut
read the whole thread...

then check post 20....

replace the resonators with cutouts.... my plan at first. till the LT's go in the car
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Old 04-06-2009, 09:22 PM   #25
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Also if you plan on having them open for most of the time the important thing to do is get your car tuned for them other wise ur not getting the potential out of your car. being that this will be your daily driver is no reason to ignore getting an aftermarket exhaust for the extra horses. There are plenty of aftermarket exhaust that are not loud that improve the same gains. If your planning on doing Longtubes and cut out its a good idea to spend a lil extra on just getting full exhaust. Btw you dont have to spend a grand on exhaust in fact if you do your paying too much!!
Well, since i want to keep this car fully street legal, as well as for emissions tests i dont plan on foolin with the cats. As for the aftermarket exhaust, i dont really see the need for one, i mean, sure the stock resonators might be able to be improved, but the pipes already look to be of a decent size, i id rather just replace the mufflers for a better sound, but im going to accomplish that with the cutouts, and if i ever go the route of headers i think i would try to use as much of the stock pipes as possible to save money.

Anyways, as for the original reason for the thread....i guess the consensus is that the best place would be before the rear axle, or somewhere in that region. I think i would also include a small section of turn-down for good measure
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