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.
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.
Well, I don't have any of one but here is a schematic from the S2000. You can clearly see it on the mid-pipe: #11.Pics of this "T"?
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.
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.
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.
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?
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.