[fl0wmastr]

ah bummer. did it help decrease the loudness of the wastegate rattle or rasp at all ?

[Rotorocious]

Originally Posted by fl0wmastr

ah bummer. did it help decrease the loudness of the wastegate rattle or rasp at all ?

Nope.

Eventually I stopped caring about the noise and just drove the car.

[SCS15]

@cn555ic do you know if it matters if the resonators are side-by-side or staggered? I don't think the vibrant resonators will fit side-by-side on my magnaflow exhaust

[cn555ic]

Mine are staggered a little but it shouldn't be to the point one is at the front and the other at the rear! A little should be fine

[SCS15]

Originally Posted by cn555ic

Mine are staggered a little but it shouldn't be to the point one is at the front and the other at the rear! A little should be fine

No I plan on having them both in that straight section after the downpipes but I don't think they will fit right next to each other because my piping looks tight together already.

[neilvosko]

the resonators WILL in fact help with drone, they will break up the long sound waves to reduce the resonance in the pipe

[jake1829]

Originally Posted by cn555ic

All you need to do is verify that you have at least 14 inches of straight piping on each side of the midpipe and have enough clearance to weld the resonators in...

Here is AA exhaust from the bottom..Hope that helps! Look at the pic past the xpipe and brace parallel to the gas tank where there is straight piping on both sides...I would think that would be your install location, only thing have that needs to be verified is height clearance which shouldn't be a problem since exhaust piping is 2.5 and the diameter of the resonator is 3.5.....One inch should not be a problem IMO.

Has anyone done this for the AA, just had my AA exhaust installed on m 6AT 335i and low rpm's - cabin is loud and raspy - not exactly what i was looking for

[cn555ic]

Originally Posted by jake1829

Has anyone done this for the AA, just had my AA exhaust installed on m 6AT 335i and low rpm's - cabin is loud and raspy - not exactly what i was looking for

Do you actually read threads fully or you go straight to the last page? lol Look at post 62 and you will find your answer..

[jake1829]

Originally Posted by cn555ic

Do you actually read threads fully or you go straight to the last page? lol Look at post 62 and you will find your answer..

I've read the thread and haven't seen anyone reply that they have installed resonators with their AA exhaust.....

post 62:

Originally Posted by ar design

you stay out of this!!!!!!!!

not sure how that can help

post 76 was the informative post on where they could be installed in conjunction with their AA exhaust - i wanted to hear feedback if anyone has done it or not...

[cn555ic]

Originally Posted by jake1829

I've read the thread and haven't seen anyone reply that they have installed resonators with their AA exhaust.....

post 62:

not sure how that can help

post 76 was the informative post on where they could be installed in conjunction with their AA exhaust - i wanted to hear feedback if anyone has done it or not...

The person with the AA exhaust got it done from what I remember and it did reduce the drone and rasp...You have nothing to worry about go ahead and do it as the resonators are not all that expensive]

[chezbmw]

I have an e93 328i. I had the muffler deleted this weekend, and I absolutely hate the sound from low rpm. I get a really cheap honda-type ricey sound. I know the basics of frequencies and how resonators work, but I can't quite figure out what type of resonator corresponds to this unpleasant tone and where I need to have it installed to get rid of this embarrasing sound. Is this the same problem that you were able to fix with these resonators? And would I only need one resonator for the 328i? Also, should I replace the OEM resonator, or install this one further towards where my muffler was deleted?

[cn555ic]

Originally Posted by chezbmw

I have an e93 328i. I had the muffler deleted this weekend, and I absolutely hate the sound from low rpm. I get a really cheap honda-type ricey sound. I know the basics of frequencies and how resonators work, but I can't quite figure out what type of resonator corresponds to this unpleasant tone and where I need to have it installed to get rid of this embarrasing sound. Is this the same problem that you were able to fix with these resonators? And would I only need one resonator for the 328i? Also, should I replace the OEM resonator, or install this one further towards where my muffler was deleted?

Yes I was getting this raspy sound and it was terrrible...Since 328 has only one pipe I would put the resonator in place for sure

[chezbmw]

Originally Posted by cn555ic

Yes I was getting this raspy sound and it was terrrible...Since 328 has only one pipe I would put the resonator in place for sure

Ok, awesome. Thanks! Can't wait to get rid of that sound.

[D335NUTZ]

Originally Posted by cn555ic

Yes I was getting this raspy sound and it was terrrible...Since 328 has only one pipe I would put the resonator in place for sure

Lol wow someone dug up this thread lol. I didn't even see it. I bought the 18" long 3.5" resonator. Gonna finally get rid of my secondary cats.

[napeHbNYC]

Installed with my PE and fully catless. Night and day difference compared to without and fully catless. Cleaned up the sound. Definitely a must with PE and fully catless.

[Isaiah5411]

This will probably make you laugh (unless you've already seen my questions about this on other threads ), but...

I installed a PE in my E93 328. It is actually a little loud for my taste (at or near WOT) with the top down. (It is actually almost too quiet with the top up). It is growing on me but it was just louder than I thought it would be with the top down. Before I bought it, I hadn't read many E93 owners report what they thought of the PE. Most who had it had also modified cats, headers, etc.

What do you think adding a Vibrant 1792 to the PE system would do? (Note: Everything else is stock except for the Euro airbox and 3.0 3-stage manifold conversion). Would it totally destroy the sound of the PE or do you think it could produce the happy medium I'm looking for?

[JasW]

Worth resurrecting this thread again as a current PE thread has been transformed into a discussion of rasp, drone, etc. when paired with catless DPs. I have ar design DPs paired with the stock 335is exhaust (which is of course different than a stock 335i exhaust). I'm also driving an MT, so I tend to wind out the lower gears more.

Drone and rasp may well be a part of it all, but what I really find a bit much is the incredibly loud Honda fart cannon sound when I get close to 5K RPM in 1st or 2nd gear. Holy Rice-a-roni, Batman!

Anyone know (1) whether the resonators will put this particularly annoying type of rice back in the box, and/or (2) whether the stock 335is exhaust needs the 2.25" Vibrant 1790 or the 2.5" Vibrant 1792?

[JasW]

cn555ic

Hey, this thread is your baby, how about some moral support here?

[Joey911]

Originally Posted by JasW

Worth resurrecting this thread again as a current PE thread has been transformed into a discussion of rasp, drone, etc. when paired with catless DPs. I have ar design DPs paired with the stock 335is exhaust (which is of course different than a stock 335i exhaust). I'm also driving an MT, so I tend to wind out the lower gears more.

Drone and rasp may well be a part of it all, but what I really find a bit much is the incredibly loud Honda fart cannon sound when I get close to 5K RPM in 1st or 2nd gear. Holy Rice-a-roni, Batman!

Anyone know (1) whether the resonators will put this particularly annoying type of rice back in the box, and/or (2) whether the stock 335is exhaust needs the 2.25" Vibrant 1790 or the 2.5" Vibrant 1792?

Hey I have N55 with VRSF catless, the rest from a 335is(secondary cat, xpipe, 335is mufflers)

And it drones pretty badly even with the flap closed.

Since I already have the secondary cat in place, I don't know where else I can put resonator... So I am thinking to put the center muffler from older sedan model to my coupe.

What did you do to fix the drone?

[JasW]

Originally Posted by Joey911

Hey I have N55 with VRSF catless, the rest from a 335is(secondary cat, xpipe, 335is mufflers)

And it drones pretty badly even with the flap closed.

Since I already have the secondary cat in place, I don't know where else I can put resonator... So I am thinking to put the center muffler from older sedan model to my coupe.

What did you do to fix the drone?

I'm still trying to figure out what the consensus is before I buy and then go into the muffler shop. That is, the consensus as to not only where to put the resonators, but also which model Vibrant to use, the 1790 or 1792.

It's been made a bit difficult by having to sort through apparent exhaust differences among E9x's -- pre- or post-LCI E90, X-Drive, etc. Here's a pic of a completely stock E92 pipe set-up for reference:



From what I've been able to gather thus far, for the stock E92/E93, including the 335is exhaust, there are three basic places, using one or the other Vibrant model:


(1) In place of the secondary cats using the Vibrant 1792. The view in the pic here is looking toward the front of the car. This is apparently the easiest, and you can use the wider 1792s because that location is designed to accomodate the cats. But I want to avoid this primarily because of the smell and fumes. Although some people say it's not bad, others say it is. I have a vert, so there's that. Also, backing into my garage with catless DPs leaves enough of a stink that I can only imagine would get worse, although it's not horrible and does dissipate quickly.


(2) Just behind the x-pipe (i.e., the side toward the rear of the car) using the Vibrant 1790. The view in this pic is toward the rear of the car. This placement of course allows you to keep the secondary cats. However, it doesn't appear to be as straightforward as just swapping out the secondary cats. As you can see from the reference photo at the top, the driver's side of the exhaust coming out of the exhaust pipe is slightly crushed and curved, apparently on purpose to accommodate the pipe positioning. You can see in the pic with the 1790s here that there was some artful welding work done, with wrap or tape or something. I imagine if you have a good local muffler shop, they could do this, but I don't know.



(3) In front of the x-pipe (i.e., the side toward the front of the car), presumably using the 1790. I don't have a picture of this; someone in another thread advised it a couple of days ago as the proper place to put it when wanting to keep the secondary cats. But as the picture I do have shows, there is a brace plate of sorts in this position, and I don't know how or whether even the narrower 1790 would fit here, or whether it's ever actually been done, and this was just a thought.

My inclination is to buy the 1790 resonators and go into the muffler shop and see if they can do option #2. If they say they can't, and even option #3 is out, I'm apparently stuck with having to swapping out the secondary cats with the 1790s, where I'd want the 1792s (although I imagine I could just return the 1790s, buy the the 1792s and go back to the muffler shop, and deal with the waste of time).

[Joey911]

Originally Posted by JasW

I'm still trying to figure out what the consensus is before I buy and then go into the muffler shop. That is, the consensus as to not only where to put the resonators, but also which model Vibrant to use, the 1790 or 1792.

It's been made a bit difficult by having to sort through apparent exhaust differences among E9x's -- pre- or post-LCI E90, X-Drive, etc. Here's a pic of a completely stock E92 pipe set-up for reference:



From what I've been able to gather thus far, for the stock E92/E93, including the 335is exhaust, there are three basic places, using one or the other Vibrant model:


(1) In place of the secondary cats using the Vibrant 1792. The view in the pic here is looking toward the front of the car. This is apparently the easiest, and you can use the wider 1792s because that location is designed to accomodate the cats. But I want to avoid this primarily because of the smell and fumes. Although some people say it's not bad, others say it is. I have a vert, so there's that. Also, backing into my garage with catless DPs leaves enough of a stink that I can only imagine would get worse, although it's not horrible and does dissipate quickly.


(2) Just behind the x-pipe (i.e., the side toward the rear of the car) using the Vibrant 1790. The view in this pic is toward the rear of the car. This placement of course allows you to keep the secondary cats. However, it doesn't appear to be as straightforward as just swapping out the secondary cats. As you can see from the reference photo at the top, the driver's side of the exhaust coming out of the exhaust pipe is slightly crushed and curved, apparently on purpose to accommodate the pipe positioning. You can see in the pic with the 1790s here that there was some artful welding work done, with wrap or tape or something. I imagine if you have a good local muffler shop, they could do this, but I don't know.



(3) In front of the x-pipe (i.e., the side toward the front of the car), presumably using the 1790. I don't have a picture of this; someone in another thread advised it a couple of days ago as the proper place to put it when wanting to keep the secondary cats. But as the picture I do have shows, there is a brace plate of sorts in this position, and I don't know how or whether even the narrower 1790 would fit here, or whether it's ever actually been done, and this was just a thought.

My inclination is to buy the 1790 resonators and go into the muffler shop and see if they can do option #2. If they say they can't, and even option #3 is out, I'm apparently stuck with having to swapping out the secondary cats with the 1790s, where I'd want the 1792s (although I imagine I could just return the 1790s, buy the the 1792s and go back to the muffler shop, and deal with the waste of time).

I was expecting that the secondary cat will do a better job than resonator in terms of quieting down the exhaust note?

What do you think about swapping xpipe with center muffler?

[JasW]

Originally Posted by Joey911

I was expecting that the secondary cat will do a better job than resonator in terms of quieting down the exhaust note?

What do you think about swapping xpipe with center muffler?

No, you need to put in resonators if you're talking about getting rid of or reducing the rasp. Secondary cats don't do anything about that, which is why some people replace them with the resonators.

I don't see how a muffler is going to fit where the x-pipe is.