I usually keep my cars for a long time, and will probably be driving this GS for at least 6 or 7 yrs. So, I figured I'd put in the effort up front to make it perfect....and then have many years of pure enjoyment. Yes, it was a pain in the *** to spend two weekends soundproofing it.....but after experiencing the results, it was definitely worth it.

 

One thing that i did was in the rear section, since i do not have a subwoofer was after putting in the mat and pad was to fill that voided area with foam.

 

You would really really really hate my car lol. That’s some serious dedication! Great job.

 

Where do live??? I'd love to have you do it!!.... I'm only half joking, I'll help and I'll pay

 

Does adding a cargo mat help reduce noise at all?.......

 

The only thing I see wrong with your thread is you equate silence inside the car with quality. Silence inside the car has to do with the designed purpose of the car. As you found silence can be low cost to add. However, it impacts performance because it adds weight. When you buy a $75K Corvette you are buying something the other cars you mention do not have. Performance. The emphasis is on performance and reducing things that cost performance and don't add much value.

The cars you are using as a reference do not have the undercarriage and suspension that you get on the Corvette. You get a basic run of the mill suspension used on thousands of other cars. With the Corvette you are getting an aluminum frame, super lightweight body panels, double A race car suspension made from forged aluminum control arms at all 4 wheels. If you take all the things you get in a Corvette and put those in a car similar to your quiet reference point the cost of the car might double. Adding performance capabilities can be very expensive. The old adage still applies, "So how fast do you want to go son? Performance Costs Money!" What is amazing is GM some how provides that at a reasonable cost.

Bill

 

I dropped in a set of Block It sound mats (cargo area plus one behind each seat) in my C7 Stingray coupe.
Using the Decibel X Pro app, I measured 2 - 5 dB lower noise levels on varying roads at varying speeds, which was noticeable, but more importantly, the cargo pad cut down the reverberations from the drum head that is the cargo floor and reduced the noise spikes generated by road joints and seams... The 'Vette is now about as quiet as my '11 Mustang GT 5.0, my previous "touring" car...
The pads aren't cheap, and do add weight, but they attenuate much of the most annoying noise from the back of the car. IMO worth the money.

 

Depends on what Loewy was designing....

Weight sometimes is very beneficial....

 

I doubt that adding a cargo mat will help much. However, if you were to put a sheet of mass loaded vinyl under the cargo mat, that should help some, but you will still have noise coming through from the wheel well housings.



It was such a pain in the *** to do that I am now retired! Sorry. If you are ever traveling up east, you ought to see if the man himself, Don Stamford of Sound Deadener Showdown will do it for you. They are located in Manchester, MD.



I agree with you completely, which is why I bought a GS. The technology and level of performance are unbelievable for the money - what a steal....and absolute proof that God loves us!

Since I began driving, I've always been modifying my cars and trying to improve them and have never really been fully satisfied. However after soundproofing, this GS is damn near perfect....and the only reason I say "near" is because there are occasional times when I would like 650 lbs of LT4 torque to play with.

Anyway, my goal in soundproofing it was to try and "have my cake and eat it too"....and to not have to spend three times as much $$$ for something like a Porsche Turbo S. And it worked. This car brings me so much joy....every single day I can't wait to go out and drive it.

 

Wow...this is a nice write up Thanks.

 

So just how much does say 25 lbs in sound proofing affect performance? Will performance be impacted enough that a major of owners will ever notice the difference?

I would say the bigger impact to weight to performance would someone seating in the passenger seat.

 

For me the vette is a vehicle for the street. Anything that improves my enjoyment is valid. If adding weight improves my enjoyment then it makes sense. If I were concerned with every last bit of performance I would pull all the carpets, the passenger seat, and just about anything I could to reduce weight. But that makes it suitable for the track and unsuitable for the street (at least for me).

I live in a urban area. 460hp has way more performance than the laws, streets, and traffic allows. Am I concerned about an additional 100lbs of sound deadening? Not a bit.

 

All these people complaining about noise and heat in a C7 must have never had previous generations. The C7 is far quieter and cooler. I don't want my sportscar to be luxury sedan quiet. Whatever floats your boat.

 

Did the exact same thing with the exotic vette insulation kit and found it to be more than acceptable. No more road noise or mysterious squeaks/rattles. Many products to achieve same result, So good that your happy with end result and good write up.

 

Thanks to the op for his thoughts and procedures in addressing the interior noise issue. It’s forum members like him that represent the best in membership. Weather you drive your Vette 2000 miles a year or 20,000 it’s nice to know you have a viable option if interior noise bothers you. Great post. Thanks for your time.

 

Awesome. Thanks for the feedback. Whats nice is even though the BLOCKIT mats have some weight to them, they are not permanent.
You're not gluing weight to the car. You can take the Blockit out if you hit a track event.

Thank you again for your purchase and for taking the time to post your feedback!

 

I think I will start here, as taking the interior out is a disaster waiting to happen if try it

 

TKO, Can I put wheathertech or Lloyds mat on top of it in the cargo area?

 

I put the Block It pad over the stock carpet, then put a Lloyd's mat on top of it...

 

Hey, Where did you get this kit? For now I think I will go with the TKO combo kit of Blockit and Lloyds mats.
However I did an insulation kit on my previous C5 Z. Just can't remember where I got it. It was all pre cut.......