Ok I love my car sound right now deep and angry, but that's gotta go. Has anyone made their exhaust quieter? My mods right now are cai, bpv, dp. I was thinking of adding a giant resonator but I'm scared it might restrict freeflow. If I add a resonator what size do I need a 2.5 or 3 in, I'm thinking 2.5 since mine is stock but help is appreciated. Thanks
How to make my car quieter
- Thread starter MPC12347
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oaklandopen
Member
To adjust interior sounds without messing with your exhaust flow, you'll probably want to add sound deadening stuff to the inside of your car
Id say, since most of the exhaust sound is coming from the back (for obvious reasons) you may just be able to add some deadening to the trunk. The trunk area is going to be the easiest to mess with since you don't have any majore stuff to take out. The spare would be the toughest part. Then, when you get to the bare body after removing the carpet and whatnot, put some dynamat or paintable sound deadening stuff on.
If the sound is still too much, take the plastic covering off your hatch and put stuff in there. And basically, work your way towards the front if the sound still bothers you
Id say, since most of the exhaust sound is coming from the back (for obvious reasons) you may just be able to add some deadening to the trunk. The trunk area is going to be the easiest to mess with since you don't have any majore stuff to take out. The spare would be the toughest part. Then, when you get to the bare body after removing the carpet and whatnot, put some dynamat or paintable sound deadening stuff on.
If the sound is still too much, take the plastic covering off your hatch and put stuff in there. And basically, work your way towards the front if the sound still bothers you
I purchased the Racing Beat Exhaust specifically for the reason of quieting the overall sound. It has done a fantasic job of doing that with the stock DP and stock cats in place.
I had a test pipe too, but that just made everything louder, so i put the cat back in. I think the Racing Beat with Test pipe is about as loud as the stock exhaust.
If you want quieter, get a quieter exhaust. Try that out and you might need to lose the DP too to make it more quiet.
My experience with Sound deadening material is that it didn't help much and just added a lot of weight.
I had a test pipe too, but that just made everything louder, so i put the cat back in. I think the Racing Beat with Test pipe is about as loud as the stock exhaust.
If you want quieter, get a quieter exhaust. Try that out and you might need to lose the DP too to make it more quiet.
My experience with Sound deadening material is that it didn't help much and just added a lot of weight.
Read my sig below. I have a 3 inch Vibrant Ultra Quiet stainless resonator welded into the middle of my racepipe. I'm running a catless dp/rp into stock CBE. It droned badly at 2,500 rpm range, especially when cruising or when decelerating though that range. The reso zapped the droning and took the edge off of the catless dp/rp volume. It's an easy install. There are threads here about this. I installed the reso right after hearing the drone which was at least 35,000 miles ago. It is holding up just fine. It is a big open straight through reso and will not steal any power. 60-100 comes up in 6.1-6.3 seconds depending on weather. 40-120 comes up in 12.5 seconds. The reso takes nothing measurable away from performance.
The size of the reso will depend on where you put it. If you have a one piece dp, you would put it close to the end in what would be the rp section. If you have a separate rp, it goes in the middle. The size will depend on your own piping at the location you chose. Since my rp was 3" that's what I got for the reso. It will slip fit over the outside of your pipe. You can then clamp it in place after rotating to fit, then remove it and take it to a muffler shop to get it welded. Easy.
Cost should be around $90 for the reso. Vibrant part # for the 3 inch is #1142 and for 2.5 inch is #1141. Extremely high construction. Amazon is going to have the best price.
Here is what it looked like before I took it to the shop for welding. Can't find the post-welded pix, but you get the idea.
The size of the reso will depend on where you put it. If you have a one piece dp, you would put it close to the end in what would be the rp section. If you have a separate rp, it goes in the middle. The size will depend on your own piping at the location you chose. Since my rp was 3" that's what I got for the reso. It will slip fit over the outside of your pipe. You can then clamp it in place after rotating to fit, then remove it and take it to a muffler shop to get it welded. Easy.
Cost should be around $90 for the reso. Vibrant part # for the 3 inch is #1142 and for 2.5 inch is #1141. Extremely high construction. Amazon is going to have the best price.
Here is what it looked like before I took it to the shop for welding. Can't find the post-welded pix, but you get the idea.
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Check out Noxudol 3100 http://www.youtube.com/watch?v=RkYrBpARXxw
Don't know why you want such a long reso, and not sure where you could fit such a reso in the CBE section. Most of the internal volume you are getting in the cabin is coming up through the floor via the general area of that frame cross member and resonating inside the cabin. Your racepipe runs right through that area. IMHO, that was the ideal place for me to attack the problem.
Of course, I was concerned about the drone primarily and secondarily the increase in volume. Your concerns may be different.
Let me say that the expensive part of the race pipe are the flanges on each end and the flex joint, if yours has one. Adding a reso does not affect any of that. You can go back to stock very easily. Just save the section you or your muffler shop cut out. Test the reso first with stainless muffler clamps before welding in place. If you like the result, and I think you will, you can then leave it with clamps or weld it in.
If it doesn't work, the removed part of your rp can be welded back in place.
Putting a reso further aft, if there is room, might help noise level outside the car, but if cabin noise is the issue, attack the problem at its source, and where there is room to make the change. I'd just hate to see you cut up your CBE which is way, way more expensive than your aftermarket race pipe.
Ultimately, do what you think best -- its your car, the mod choices are yours. Just wanted to share my experience.
Of course, I was concerned about the drone primarily and secondarily the increase in volume. Your concerns may be different.
Let me say that the expensive part of the race pipe are the flanges on each end and the flex joint, if yours has one. Adding a reso does not affect any of that. You can go back to stock very easily. Just save the section you or your muffler shop cut out. Test the reso first with stainless muffler clamps before welding in place. If you like the result, and I think you will, you can then leave it with clamps or weld it in.
If it doesn't work, the removed part of your rp can be welded back in place.
Putting a reso further aft, if there is room, might help noise level outside the car, but if cabin noise is the issue, attack the problem at its source, and where there is room to make the change. I'd just hate to see you cut up your CBE which is way, way more expensive than your aftermarket race pipe.
Ultimately, do what you think best -- its your car, the mod choices are yours. Just wanted to share my experience.
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