Exhaust
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Mercedes and BMW
Exhaust
I just picked up a gently used C450 with 7630mi and have been looking at modifying the stock exhaust system. I have scoured the forum with what members have done and cant find specifics to my hypothetical idea. I am looking for anyone's thoughts in making it into dual exhaust. Yes, I have considered brand name exhausts. My idea is to remove the resonator and making a dual pipe (perhaps adding an x-pipe where the resonator is) all the way to the Y connector, cut that off and reconnect to the stock dual exhaust?. So in essence, it makes a dual exhaust using the stock setup. Will that setup still have the similar acoustics or just have an awful sound? Some posts describe droning when removing both resonator and mufflers. Thoughts?
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2018 C43 AMG
I was planning on doing the same, I just don't have much time. I was going to cut off the resonator and make it a dual exhaust down towards the mufflers. You will get drone removing mufflers or resonators, but if you can replace them with bullet mufflers so it can resonate some drone.
I was going to cut off the resonator and put in 2 mandrel pipes and have 2 straight pipes going down to the mufflers with an h or x pipe in the middle and replace the mufflers with jones resonators or some sort of bullet muffler
I was going to cut off the resonator and put in 2 mandrel pipes and have 2 straight pipes going down to the mufflers with an h or x pipe in the middle and replace the mufflers with jones resonators or some sort of bullet muffler
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2018 C43 AMG
I do believe it'll sound nice with the dual exhaust and no resonator. Hopefully, I can do it soon when i have the time ( I keep procrastinating). When do you plan on doing this?
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Mercedes and BMW
I was planning to do this in the next few months as I go in next week for a full clear bra application. I just got a full exterior detail treatment so they could apply the xpel. After that, then comes the exhaust
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Just a follow up to this thread that this morning the muffler shop removed the single exhaust and fabricate me a dual exhaust mirroring the PE exhaust except I dont have an H pipe or the valved mufflers. I reused the stock mufflers to avoid possible droning and to my surprise, no drone at all. Initial impressions are the sounds at idle are a tad deeper. The pipes to the xpipe and midpipes are press bend....didnt care if it wasnt mandrel bend because not going to see much of a difference. However, I made sure the bends after the rear diff are mandrel. A U-bend was cut in half to make the 90 bend. Since I drove there, there are no cold starts so that is TBD. The car doesnt resonate much at cruising speeds and appears to be smoother. At mid to moderate loads the burbles are much more apparent in the vehicle. WOT you can definitely tell its louder than stock.
As for the pops and crackles, I lost them after this project so I will do an ECU reset to get them back. Not sure why perhaps the new exhaust flow?? The overall cost OTD was $400...now this was done in CA and shop rates are $125-150/hr.
Last edited by b6tbfmp; Oct 30, 2018 at 02:37 PM.
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C43 AMG Coupe
"I lost them after this project so I will do an ECU reset to get them back"
How do you reset the ECU? My upshift bangs have vanished after a tune so while the tuner looks into it, I could give this a try.
How do you reset the ECU? My upshift bangs have vanished after a tune so while the tuner looks into it, I could give this a try.
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C400
Alex
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Mercedes and BMW
I apologize for that. One was for the diameter of the piping and the other is to follow up. I should have check and didnt realize that you could review past posts.
My tuner says:
OPEN YOUR HOOD, CLOSE YOUR VEHICLE DOORS AND ENSURE THAT THE VEHICLE HAS BEEN OFF FOR AT LEAST 10 MINUTES.
- Disconnect the two battery terminals. Negative (black) and Positive (red)
- You can use the red cover that once covered the "positive" terminal, put back into place to keep the positive terminal from touching the battery
- Once disconnected, let the vehicle sit for about 5-10 minutes.
- Now, carefully without touching the battery, take the positive and negative "wires" and touch them together.
- Again, make sure you are NOT connected to the battery or touching the battery in any way.
- Once this is done, you can put the terminals back onto the vehicle.
- Now your vehicle's ECU and modules in the car have been fully reset.
I think this discharges the capacitance with all sensors. I did this before I reinstalled my ecu back from my tuner......my pops and crackles disappeared and reappeared the next day.
[QUOTE=CA400;7590525]I've read on many threads that after a ECU tune the pops and crackles are lost but come back after driving the car for a few days/weeks. Search "lost pops and crackles after tune" I'm sure you will find lots of info. Pics look good and the price sounds very reasonable!
Thanks! This is true, you can wait a day or two but I want to ensure whatever sensor that detects exhaust flow takes note of the reduced back pressure
OPEN YOUR HOOD, CLOSE YOUR VEHICLE DOORS AND ENSURE THAT THE VEHICLE HAS BEEN OFF FOR AT LEAST 10 MINUTES.
- Disconnect the two battery terminals. Negative (black) and Positive (red)
- You can use the red cover that once covered the "positive" terminal, put back into place to keep the positive terminal from touching the battery
- Once disconnected, let the vehicle sit for about 5-10 minutes.
- Now, carefully without touching the battery, take the positive and negative "wires" and touch them together.
- Again, make sure you are NOT connected to the battery or touching the battery in any way.
- Once this is done, you can put the terminals back onto the vehicle.
- Now your vehicle's ECU and modules in the car have been fully reset.
I think this discharges the capacitance with all sensors. I did this before I reinstalled my ecu back from my tuner......my pops and crackles disappeared and reappeared the next day.
[QUOTE=CA400;7590525]I've read on many threads that after a ECU tune the pops and crackles are lost but come back after driving the car for a few days/weeks. Search "lost pops and crackles after tune" I'm sure you will find lots of info. Pics look good and the price sounds very reasonable!
Thanks! This is true, you can wait a day or two but I want to ensure whatever sensor that detects exhaust flow takes note of the reduced back pressure
Last edited by b6tbfmp; Oct 30, 2018 at 07:12 PM.
Thread Starter
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Joined: Jan 2009
Posts: 201
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Mercedes and BMW
Thread Starter
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Mercedes and BMW
Definitely felt more torque and power...no loss at all. The boost spooled faster. Dp's are coming so will let you know when I get them installed. I just installed semi forged 20s onto my car today so I know it will affect the acceleration! I got all my pops and crackles and its ridiculously louder like what a PE would sound!!! I couldnt believe it.....kept on asking if this is my car I am driving.
Last edited by b6tbfmp; Oct 31, 2018 at 10:42 PM.
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C400
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GLC43, X P100D, S P100D, CT200H
I just picked up a gently used C450 with 7630mi and have been looking at modifying the stock exhaust system. I have scoured the forum with what members have done and cant find specifics to my hypothetical idea. I am looking for anyone's thoughts in making it into dual exhaust. Yes, I have considered brand name exhausts. My idea is to remove the resonator and making a dual pipe (perhaps adding an x-pipe where the resonator is) all the way to the Y connector, cut that off and reconnect to the stock dual exhaust?. So in essence, it makes a dual exhaust using the stock setup. Will that setup still have the similar acoustics or just have an awful sound? Some posts describe droning when removing both resonator and mufflers. Thoughts?
But when youre on it, it will sound good.
Personally I think you should just get a custom valved muffler/midpipe setup.
I have a custom exhaust on my GLC43 and thats my experience. It would be a bit irritating if I could not close the muffler valve when I want to be quiet. You need to realize that after you delete the resonators the car will be louder than before and any drone you had previously as stock will be magnified. Just because you want the car louder now does not mean you will want the car loud all the time after you delete your resonators (when the car will be much louder).
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Without Resonators it will definitely have some low/mild drone. And since you did not change your muffler to something valved, there will be no way to turn off the drone when you are in comfort/eco mode on the freeway.
But when youre on it, it will sound good.
Personally I think you should just get a custom valved muffler/midpipe setup.
I have a custom exhaust on my GLC43 and thats my experience. It would be a bit irritating if I could not close the muffler valve when I want to be quiet. You need to realize that after you delete the resonators the car will be louder than before and any drone you had previously as stock will be magnified. Just because you want the car louder now does not mean you will want the car loud all the time after you delete your resonators (when the car will be much louder).
But when youre on it, it will sound good.
Personally I think you should just get a custom valved muffler/midpipe setup.
I have a custom exhaust on my GLC43 and thats my experience. It would be a bit irritating if I could not close the muffler valve when I want to be quiet. You need to realize that after you delete the resonators the car will be louder than before and any drone you had previously as stock will be magnified. Just because you want the car louder now does not mean you will want the car loud all the time after you delete your resonators (when the car will be much louder).
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C400
Alex
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10 C63 AMG
I was thinking the same thing. I was just thinking that maybe the C400 has different mufflers then a C450/C43. Making the sound different, I do have a ECU tune and was told that burbles/pops were added. I can hear them slightly on S+ mode when the car downshifts. I was wondering if maybe this would make them louder? Definitely a tons cheaper then aftermarket exhaust, but aftermarket exhaust has been tested. I just would hate to cut up the OEM system then need to put it back.....oooh the choices!!
Alex
Alex
I think you and I are looking to do very similar things to our cars so let me know what you find out or decide on.
I came from a C63 so having little to no exhaust sound has been somewhat disheartening. I do however love the comfort, ride quality and look of the car - just want to give er a lil nudge in the right direction
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I was thinking the same thing. I was just thinking that maybe the C400 has different mufflers then a C450/C43. Making the sound different, I do have a ECU tune and was told that burbles/pops were added. I can hear them slightly on S+ mode when the car downshifts. I was wondering if maybe this would make them louder? Definitely a tons cheaper then aftermarket exhaust, but aftermarket exhaust has been tested. I just would hate to cut up the OEM system then need to put it back.....oooh the choices!!
Alex
Alex
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C400
I'm going to look for a shop around me that does mandrel bends and talk to them about this, without cutting up my stock exhaust.
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Thanks for that info. I wonder how different the sound would be, because if I did the this all the piping would be the same except for the mufflers?
I'm going to look for a shop around me that does mandrel bends and talk to them about this, without cutting up my stock exhaust.
I'm going to look for a shop around me that does mandrel bends and talk to them about this, without cutting up my stock exhaust.
