Has anyone put any sound deadening material in the rear of their Crossfire? It seems to me that a lot of the road noise I hear comes from the back - rear wheels, differential, etc., and I'm interested in finding methods to reduce it.

I'm not sure what materials to use, or where to place them?

 

Dynamat.
Or, good old carpet underfelt.

 

Is there much difference between the two?

 

i would recommend the dynamat... hands down for sound deadening purposes.

 

Thanks Andrew.

 

There's a product very similar to Dynamat (well, there are several, actually) called eDead. You can usually find it on ebay for a price waaaay below Dynamat. I picked up 120 sq-ft to line my PT Cruiser with - it does a great job! For the price you can't beat it. Shop around a bit at various websites, then look at the prices for eDead on ebay.

 

I have a bunch of never-used dynamat that I don't need...I'll give you a good deal.

email me at bhertwec at: highpoint.edu

 

NoCones:

I sent you an e-mail about the Dynamat.

Thanks.

 

Hi, its important to consider that the large contact area of the wide rear tyres causes more road noise and the tyres are much closer to the driver/cockpit area than most cars so you will notice road noise more. However, apart from using extra layer of carpet etc in the boot (or trunk) you will notice the vast empty spaces inside the rear wings which is accessed through the rear light bulb access panels. This spaces resonates road noise, and can be filled out with foam quite easily to reduce this.

Cheers,
Steve

 

Where do you add the dynomat? Do you remove the carpeting on the sides? Or just under that pad that covers the jack? How hard is it to remove (and replace) the carpeting on the sides?

 

Hi, My trunk floor carpet was badly soiled when i got the car, so I bought a piece of matching car carpet 1 metre x 2 metres. Using the original as a template I cut out 2 pieces and covered the original, sandwiching it between the new. Then stitching round the edge with an industrial sewing machine. It now looks as new and the extra thickness helps noise reduction. The trim on the sides has been left undisturbed for now but can be lifted with care just at the bottom edge if you want to slide some soundproofing in there. I have placed chunks of soft foam rubber through the rear light access panels to pack out the big empty spaces inside the rear wings. Results are good, all I hear now is the exhaust note - much better eh! Hope this helps !

 

Thanks Steve, I stuffed some towels and blankets in that area. It helped a little, but not much. I'm thinking of using eDead paint on the inside whatever part of the wheel wells I can reach, then putting the towels back. I hesitate removing any panels though. I'm not very mechanically inclined, when I take things apart, they seldom look the same when I put them back together.

Does any one know how to remove the panels in the hatchback area and the doors? Also what's the purpose of the vent in the back? Air circulation? What will happen if I plug it up a bit?

 

It is not hard to remove the panels on the sides. I just did what you are interested in. I had some left over rubber sheeting that I used for a water garden liner. I lined the sides, cut a sheet for under the removable cover where the jack is as well as ran a piece down the back of the divider behind the seats. This did help. I can't say I used the best choice for the material but it is a thick mil and was free. There is no evidence that it is there from an esthetics standpoint.

Steve

 

You're going to want to stick the Dynamat to the shell of the car (bare metal). If you think into the obvious places where noise might creep into the cabin (door panels, tire wells on the inside, under the driver and passenger seats, firewall) you should put it there. There are many imitators of Dynamat but, not one has the reputation they do. I'd recommend checking out the website. There's a lot of useful information on there including tutorials on where to put it and it's benefits.