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C4 Cabin Noise Reduction

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Old 10-25-2013, 10:21 AM
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stevbullock
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Default C4 Cabin Noise Reduction

I recently installed sound reduction material in the rear of my C4 convertible. The 1100 rpm "drone" was driving my wife nuts and she was reluctant to ride with me. I have stainless flow through mufflers from Corvette Central and they really do drone between 900 and 1300 rpm. I went to Home Depot and bought three rolls of 1/8 inch, rubber foam/aluminum foil, self-adhesive heat duct wrap @ $17 a roll. Then removed the seats and carpet and installed the wrap. Cutting each piece to fit as required. This took about three hours. When finished with the wrap, I used some spray foam, like you would use to seal a crack in your basement, to fill in spots the duct wrap could not reach. Be careful installing the spray foam as it expands in place.

The sound level has been reduced substantially and it's a lot more comfortable for both me and my wife.
Old 10-25-2013, 11:20 AM
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don hall
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Make a choice........ exhaust noise or stock/Corsa mufflers.
Old 10-25-2013, 11:27 AM
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Default C4 Cabin Noise Reduction

I don't need to make a choice. I now have both: Good sound and quiet interior.
Old 10-25-2013, 11:29 AM
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Originally Posted by stevbullock
I don't need to make a choice. I now have both: Good sound and quiet interior.
Old 10-25-2013, 11:34 AM
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Thank you!
Old 10-25-2013, 11:39 AM
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UNCLEBILL
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Originally Posted by stevbullock
I don't need to make a choice. I now have both: Good sound and quiet interior.
Old 10-25-2013, 11:48 AM
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Thanks! It doesn't need to cost hundreds of bucks.
Old 10-25-2013, 11:51 AM
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Originally Posted by stevbullock
I recently installed sound reduction material in the rear of my C4 convertible. The 1100 rpm "drone" was driving my wife nuts and she was reluctant to ride with me. I have stainless flow through mufflers from Corvette Central and they really do drone between 900 and 1300 rpm. I went to Home Depot and bought three rolls of 1/8 inch, rubber foam/aluminum foil, self-adhesive heat duct wrap @ $17 a roll. Then removed the seats and carpet and installed the wrap. Cutting each piece to fit as required. This took about three hours. When finished with the wrap, I used some spray foam, like you would use to seal a crack in your basement, to fill in spots the duct wrap could not reach. Be careful installing the spray foam as it expands in place.

The sound level has been reduced substantially and it's a lot more comfortable for both me and my wife.
Have any pics of this project ?
Old 10-25-2013, 11:52 AM
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Goldcylon
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Originally Posted by Goldcylon
Have any pics of this project ?
Did you just do the front end ?
Old 10-25-2013, 12:05 PM
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stevbullock
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Default C4 Cabin Noise Reduction

Originally Posted by Goldcylon
Did you just do the front end ?
I did the rear end - storage area, tops of the rear wheel wells, behind the seats, the bulkhead in the back of the storage area, the storage compartments, everything I could reach. That which I couldn't reach I got with the spray foam. Unfortunately no pics, it was 98+ degrees in the garage that day. Although I did document the installation of a factory luggage rack I installed in March. It was cooler then and I took my time. I'm 67 and hate the heat. This is a picture of the completed project.
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Old 10-25-2013, 02:41 PM
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Originally Posted by stevbullock
I did the rear end - storage area, tops of the rear wheel wells, behind the seats, the bulkhead in the back of the storage area, the storage compartments, everything I could reach. That which I couldn't reach I got with the spray foam. Unfortunately no pics, it was 98+ degrees in the garage that day. Although I did document the installation of a factory luggage rack I installed in March. It was cooler then and I took my time. I'm 67 and hate the heat. This is a picture of the completed project.
Nice install on the luggage rack but Im 65 and know whaqt you mean. I have thought about mounting a rack on my 1990 Vert but finding one and installing one are not on my to do lists yet.
Bill
Old 10-25-2013, 03:00 PM
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383vett
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Originally Posted by seabright
Make a choice........ exhaust noise or stock/Corsa mufflers.
I thought you were going to say exhaust noise or wife.
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Old 10-25-2013, 08:01 PM
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Great idea to insulate the interior. I was looking for ideas and found this one. Looks to me I will be at Home Depot in the morning!
Old 10-25-2013, 08:11 PM
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TorchTarga94
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I did the same in my 94' coupe's rear cargo area







Old 10-25-2013, 09:31 PM
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stevbullock
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Default Love the Quiet

Originally Posted by UNCLEBILL
Nice install on the luggage rack but Im 65 and know whaqt you mean. I have thought about mounting a rack on my 1990 Vert but finding one and installing one are not on my to do lists yet.
Bill
It took several years to find a rack. I was about to give up when a guy at a regular old junkyard gave me a call last February. He actually had two! I brought a small refrigerator home on the rack yesterday. I comes in handy.

I hope your insulation works as well as mine. You used the same stuff I did. Looks like you did a great job. Take care!
Old 10-25-2013, 09:34 PM
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Default Love the Quiet

Originally Posted by UNCLEBILL
Nice install on the luggage rack but Im 65 and know whaqt you mean. I have thought about mounting a rack on my 1990 Vert but finding one and installing one are not on my to do lists yet.
Bill
It took several years to find a rack. I was about to give up when a guy at a regular old junkyard gave me a call last February. He actually had two! I brought a small refrigerator home on the rack yesterday. It comes in handy. Take care!
Old 10-25-2013, 09:38 PM
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Default Nice job as well

Originally Posted by TorchTarga94
I did the same in my 94' coupe's rear cargo area







Looks like you used the same stuff I did. A lot less expensive that the Ecklers/Corvette Central stuff. Works just as well.

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Old 11-27-2013, 06:38 PM
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103047boat
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Default Luggage Rack

Originally Posted by stevbullock
I did the rear end - storage area, tops of the rear wheel wells, behind the seats, the bulkhead in the back of the storage area, the storage compartments, everything I could reach. That which I couldn't reach I got with the spray foam. Unfortunately no pics, it was 98+ degrees in the garage that day. Although I did document the installation of a factory luggage rack I installed in March. It was cooler then and I took my time. I'm 67 and hate the heat. This is a picture of the completed project.
You don't have the template for the rack holes do you if so would pay for it. 103047boat
Old 11-27-2013, 06:46 PM
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103047boat
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Default Luggage Rack

Originally Posted by UNCLEBILL
Nice install on the luggage rack but Im 65 and know whaqt you mean. I have thought about mounting a rack on my 1990 Vert but finding one and installing one are not on my to do lists yet.
Bill
Bill if you are near a salvage yard see if they have any Fiero's the rack they have on them look just like the vette rack, I picked a vette rack at Grand Valley Corvette in Grand Rapids ( Not sure if he has another) but coming out with my rack a Fiero was setting there I set mine on top, it was the same width, mounts the same the only thing you would need to do is buy two because the vette has two extra bars on it, other then that they look the same and are designed the same with the little spoiler 103047boat
Old 11-27-2013, 09:11 PM
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roadcaqpt
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Thanks guys was gonna order the kit from a vender here. Now off to Lowes we have no home depot.


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