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Hi guys, I am trying to cut down on road noise so I'm going after the wheel wells since I think this is where most of the noise is coming from. Now this car is kinda hard to work on because of all the electronics in the back. So if anyone has any pictures or any clues on how to get to the wheel wells I would appreciate it much.

I will be using a sound deadening product to try to cut down on the noise. I'll report back here after the weekend.
 

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Ok Donovan,

But the rear wheel wells are sound "insulated" under the rear shelf. IMO an easier, lower cost and more effective point would be to add "regular" home carpet foam padding underneath the factory carpet. But for ultimate improvements you'll want to do both, and more.

For rear wheel well access start by removing all the carpet covering over the rear shelf.

The cut away pic at the top of this page:

InsightCentral.net - Interactive Encyclopedia

will give you a general idea of what you'll be seeing underneath. But if this is your first venture under the trim of a car then the factory service manual will have several helpful diagrams that will show just how things come apart.

HTH! :)
 

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Donovan,

Recently (within the last two weeks, I think) someone posted here on InsightCentral that they put sound deadening in the rear speaker wells to improve the sound of the (optional) rear speakers. He said (as I recall) that he was surprised at the reduction in road noise.

This might be an easy way to obtain the result you are looking for.

Eric.
 

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There are a variety of sound deadening materials used in the auto industry, so some clarification may be in order. There is what is best described as "tar sheet", that is self adhesive, about an eighth of an inch thick and sometimes has a foil surface. These sheets are mainly to prevent larger panels like door skins from "drumming" (Think Rolf Harris's wobble board) Then there are the multitude of felt or foam under- lays that go anyplace, but mostly under the carpeted areas as suggested above. There are even specialist sheets of sound proofing that have a lead sheet encapsulated within the layers, with fire proof outer skins! This is mostly found in the engine bays of things that have to be whisper quiet for their cosseted owners like the large "Gin palace" power boats. I put some in a car engine bay and it worked a treat, but that is really going too far! Areas to concentrate on are the wheel arches, spare wheel well, and behind the "B" posts and near the rear speakers etc. To get an idea of how the areas near the rear speakers and electrics are accessed, you could do no better than look at he pages that show how to fit MIMA that are found at 1. Disassembly - MIMA Honda Insight Modified Integrated Motor Assist Tour De Sol

Someone has fitted a lot of the tar style sheet all over the place in my Insight, followed up in the dry places with the felt sheet and then fine bubble foam. The tar sheet is inside the doors, all over the spare wheel well, and even on the outside surfaces of the doors below the hinges!!

All of this adds weight, so it is up to you how far down this road you go. The more of this stuff you use the quieter it will be, until you get to the sort of level that you see in the likes of the "executive "cars, which is about two inches of rubber based sound proofing just about everywhere, which weighs a ton. (well, half a ton)
 

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Just by ordering and installing the OEM cargo mat helps to cut down on the noise level and protects at the same time. I have also put some carpet under padding in the spare tire wheel area and surrounding hidden cargo area. Back when I first got the car, I installed speakers in the rear so I added some carpet padding in those cubby holes as well. I also took the inside door trim off and glued the carpet padding to the underside of the trim. It all still looks stock and every bit helps. I don't think that I added too much additonal weight compared to the benefits.

JoeCVT = Just your average CVT owner
 

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The right rear wheel well can be reached around the side of the battery pack from the spare tire compartment. The front aspect of the rear wheel wells can be accessed by unbolting the aluminum panel behind the seats following the instructions for one of the 4 soundproofing projects on this site. It is easier if you remove the seats but it is not mandatory. Basically, unscrew the net pocket and remove the 6 push in plastic trim rivets that hold the carpet near the floor using a notched nail pry bar. Remove the 2 handbrake housing screws and slide it forward and off to get to a lower center bolt behind it. Lift the back wall carpet. Prise off the plastic trim at the rear of the doors to access the lateral bolts. Pull away the panel and disconnect the speakers or dummy plastic plates. The wheel wells are back on either side of the battery pack. I insulated mine with Frostking 12" self adhesive duct wrap from Lowes. $15 for 15 feet. At 1/8' thick, I used double layers.
 
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