its the esmm, along with possably the RH hitting your front sway. my RH pretty much sits on my front sway and vib's like crazy.
In-cabin Resonance
I am very happy with my car right now, except for the in-cabin noise when idling. I am running an 06 rsx-s stock muffler with a 2 1/2 inch custom axleback exhaust pipe, so the exhaust is almost as quiet as stock. Standing next to the car at idle, 850 rpm, the car is quiet, but sit in it and the resonant sound inside the cabin is annoyingly loud, like a sympathetic vibration that just fills your head, it is uncomfortable.
Anyone else this, or have a cure for this? I am not sure what the cause is. If it is because of the esmm, or just the particular tone of my exhaust at idle that sets up a vibration in the cabin. I was wondering if I were to shave down the esmm where they contact the mounting bracket on the outside of the esmm if that would reduce the vibes. Has anyone tried that? If I did that would it reduce the effectiveness of the esmm? I was also considering something like dynomat to reduce the noise.
luvmyrsx
Anyone else this, or have a cure for this? I am not sure what the cause is. If it is because of the esmm, or just the particular tone of my exhaust at idle that sets up a vibration in the cabin. I was wondering if I were to shave down the esmm where they contact the mounting bracket on the outside of the esmm if that would reduce the vibes. Has anyone tried that? If I did that would it reduce the effectiveness of the esmm? I was also considering something like dynomat to reduce the noise.
luvmyrsx
1 - 20 of 26 Posts
RH and ESMM, that's your problem.
I sat in another RSX last night that also had Innovative and ESMM. The car had the same in-cabin noise as mine.
With so many people using after market mounts, has no one figured out a way to reduce the noise inside the cabin? There are sound dampers by the front and rear mounts, has anyone tried removing or changing them to reduce noise?
luvmyrsx
With so many people using after market mounts, has no one figured out a way to reduce the noise inside the cabin? There are sound dampers by the front and rear mounts, has anyone tried removing or changing them to reduce noise?
luvmyrsx
G
There was a pretty in-depth discussion of the droning issue in some Mustang forum I was surfing a while back. Basically, the issue on any straight-through exhaust is that it propagates harmonics of a certain wavelength (which varies from setup to setup) and that generates the drone.
These guys were eliminating it by having a pipe of same diameter as the cat-back welded as a "T" at some point on the mid-pipe. Apparently, that generates a sympathetic frequency and cancels out the drone. Honda actually does this on the S2000 exhaust, so the technology is legit. I have though about doing it to my car but just been busy. Google "removing droning exhaust", or that sort of phrase and you can probably find it. Good luck.
These guys were eliminating it by having a pipe of same diameter as the cat-back welded as a "T" at some point on the mid-pipe. Apparently, that generates a sympathetic frequency and cancels out the drone. Honda actually does this on the S2000 exhaust, so the technology is legit. I have though about doing it to my car but just been busy. Google "removing droning exhaust", or that sort of phrase and you can probably find it. Good luck.
Pics of this "T"?There was a pretty in-depth discussion of the droning issue in some Mustang forum I was surfing a while back. Basically, the issue on any straight-through exhaust is that it propagates harmonics of a certain wavelength (which varies from setup to setup) and that generates the drone.
These guys were eliminating it by having a pipe of same diameter as the cat-back welded as a "T" at some point on the mid-pipe. Apparently, that generates a sympathetic frequency and cancels out the drone. Honda actually does this on the S2000 exhaust, so the technology is legit. I have though about doing it to my car but just been busy. Google "removing droning exhaust", or that sort of phrase and you can probably find it. Good luck.
meh, I'd rather not have the restriction and just deal with the noise.
G
What restriction? The tee only has to do with sound waves; exhaust doesn't go there. Nothing changes from a power standpoint.meh, I'd rather not have the restriction and just deal with the noise.
So the "T" is just a piece of solid metal?
G
No, it is hollow. The exhaust gases will follow the path of least resistance and move down the pipe. The sound waves operate differently and that's why the pipe is there.So the "T" is just a piece of solid metal?
Very interesting. I will look into this. However, the only problem I have with noise is at idle. And like I said earlier, the car is louder inside the cabin than outside at idle.
What I was thinking about is that on a stock front or rear mount, the bushing through the rubber mount is thicker than the mount itself, and the rubber of the mount doesn't appear to hit the bracket. I was thinking of shaving the rubber of the esmm where it would make contact with the bracket so that it no longer contacts the bracket, but I am unsure if that would affect the effeciency of the mount.
luvmyrsx
What I was thinking about is that on a stock front or rear mount, the bushing through the rubber mount is thicker than the mount itself, and the rubber of the mount doesn't appear to hit the bracket. I was thinking of shaving the rubber of the esmm where it would make contact with the bracket so that it no longer contacts the bracket, but I am unsure if that would affect the effeciency of the mount.
luvmyrsx
solution is KPRO. increase your idle, no more vibe.
G
Very interesting. I will look into this. However, the only problem I have with noise is at idle. And like I said earlier, the car is louder inside the cabin than outside at idle.
What I was thinking about is that on a stock front or rear mount, the bushing through the rubber mount is thicker than the mount itself, and the rubber of the mount doesn't appear to hit the bracket. I was thinking of shaving the rubber of the esmm where it would make contact with the bracket so that it no longer contacts the bracket, but I am unsure if that would affect the effeciency of the mount.
luvmyrsx
I have my idle set at 1,000rpm's, but have Innovatives. If there is any metal-to-metal contact, I could def. see the sound being loud.
Not metal to metal, but the rubber of the esmm being wedged into the mounting bracket on the frame, between the motor mount and mounting bracket.I have my idle set at 1,000rpm's, but have Innovatives. If there is any metal-to-metal contact, I could def. see the sound being loud.
Erik, you have all four innovative mounts? Is your car louder inside than out at idle? Did raising the idle rpm fix it?
luvmyrsx
G
My car is quite quiet at idle. No excessive noise that I am aware of.Not metal to metal, but the rubber of the esmm being wedged into the mounting bracket on the frame, between the motor mount and mounting bracket.
Erik, you have all four innovative mounts? Is your car louder inside than out at idle? Did raising the idle rpm fix it?
luvmyrsx
I was reading an Innovative ad the other day, and they talk about their tapered bushings that don't make contact with the chassis mount, thus reducing vibration to the chassis and cabin.
I would still like to hear from anyone who may have shaved their esmm to not make contact with the chassis mount. I would like to know if it reduced vibration without reducing the effectiveness of the esmm.
Anyone?
luvmyrsx
I would still like to hear from anyone who may have shaved their esmm to not make contact with the chassis mount. I would like to know if it reduced vibration without reducing the effectiveness of the esmm.
Anyone?
luvmyrsx
You have to sound deaden your car. /thread
A full discussion of the concept of a dead-end resonator pipe may be had in the Smith and Morrison book, Scientific Design of Exhaust & Intake Systems.
A lot of effort went into Honda's design for their mounts. Whenever you think you need to modify something, ask yourself " What do I know they don't". Maybe it is cost. Maybe it is a trade off you are willing to take. Maybe it is newer technology. Maybe they are smarter than us.
A lot of effort went into Honda's design for their mounts. Whenever you think you need to modify something, ask yourself " What do I know they don't". Maybe it is cost. Maybe it is a trade off you are willing to take. Maybe it is newer technology. Maybe they are smarter than us.
WTF? Read the post above yours. The compromise is sound vs weight. To properly sound deaden your car to rid of what you are talking about you are looking at close to 100lbs.A full discussion of the concept of a dead-end resonator pipe may be had in the Smith and Morrison book, Scientific Design of Exhaust & Intake Systems.
A lot of effort went into Honda's design for their mounts. Whenever you think you need to modify something, ask yourself " What do I know they don't". Maybe it is cost. Maybe it is a trade off you are willing to take. Maybe it is newer technology. Maybe they are smarter than us.
1 - 20 of 26 Posts
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