Im thinking of putting some sound deadening in the trunk and rear of the car to help with the exhaust sound. It sounds fine from the outside but from the inside the deep sound and vibration is too loud. If you have done this with your Evo let me know if it helped.

 

What kind of exhaust do you have to be so loud?

Not sure if it would help any, but I wouldn't do it. Just adds more weight to the car. It might help with the vibration.

 

maybe your exhaust is leaking or touching the trunk (vibration).

 

Its not that kind of vibration when the exhaust is loose. It feels like when inside the car it echos and feels like your in a cave BTW Greddy Ti catback exhaust with K&N drop in filter

 

i have used a sound deadner for a sub setup in a honda of mine. it went under the spare, and on the top of the bottom of the trunck lid. i bet it would work for you, and maybe weighed 40 lbs or so. i got it pre cut at a local steroe shop, stipped the wax paper off of the back to the adhesive, and then i put it on. cost ma about 80 bucks, and a couple of hours.

 

yes, it will help my little brother put some on his 2.5rs subby that has a stupid loud header back exhaust and it made a world or differance. I have seen it done on alot of other cars aswell so, yea it will help to lower the sound.

 

i put some fatmat (cheap dynamat) in the trunk area over the exhaust & in the spare wheel well. without ever mentioning it to them, two of my friends commented how my exhaust was quieter

 

I just added a good 50 lbs to my car by using Fatmat in the trunk and the complete interior including the front doors. I removed EVERYTHING. Seats, carpet, console, etc. came out and I deadened the crap out of it. My stereo sounds better and you can't hear my exhaust at all unless I get into the the throttle. I like it. If I want to get back to stock weight I can always remove the spare and trunk trim.

 

Wait a minute, if it is the Greddy Ti, forget about sound deadening. That thing is loud and because of the thin-walled construction of the exhuast, the sound is almost everywhere around the car. Good luck,

 

or you could just do a complete thermal wrap on the whole turbo back piping!!!

 

I agree but most of it is coming from the rear end and noticable on the right hand side. I didnt know sound deadening would weight so much.

 

Seems like the logical solution would be to put your stock muffler back on and sell the aftermarket.

 

Hey man, it doesn't weight that much. I weigh 190 pounds. A lot of guys have 50 lbs on me. Besides, 100 lbs will slow you down about .1 second in the 1/4 mile and 50 lbs. will slow you maybe .05. Better driving can easily make that up. Also, all the weight is low in the car so maybe you will effectively lower your center of gravity if handling is your thing! I wouldn't worry about 50 lbs. Your comfort and your passengers comfort is worth more. Now, I am not saying trade it in for a Lexus by any means. I mean, it IS an Evo you know....

 

negative... unless you've willing to put a lot of time and money into it. A few sheets of dyna-mat will only make a minimal difference.

The deal is in the fact you said "deep sound". These deep sounds is low frequency waves which travel through just about everything. You'll need some serious undercoating as well as carefully researched material deadening points.

I'd just dyna-mat the car like you want to put a good stereo in it. You'll still hear the exhaust but it won't be so bad.

 

Just give it a week or two and maybe you will get used to it. I have an RS which has no sound insulation whatsoever and I don't mind it at all. But I guess everyone has a different tolerance level. Are you using the stock DP and cat?