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OK, so let me try and explain where I am at, and what I am asking..
I have an 02 base a4 coupe, all stock except for a cat-back and wheels.
While driving, I can hear a lot of tire noise - which I expect, but I can hear some other noise.
1. It often sounds like a wind tunnel back there, I often check to see if the hatch is open (this is with the windows up) although I dont feel any air movement.
2. I often hear what I can only describe as the sound of a small garden waterfall. just light trickling noises. comes and goes.. and its not raining.
So, Im planning on some sound proofing back there, but Im wondering if the other two noises Im hearing may need attention first?
It's the ghost of the previous owner. Call a medium to resolve it. Lol.
I did sound deadening. There are pre cut kits out there.... And I used one for the cabin.... But I had bought sound matting from an audio dealer some time ago and did the trunk and doors with it. Adds weight, but a bit quieter. Also put some between the inner wheel well shrouds and the fiberglass trunk tub. Pretty easy to do.
You're going to hear a lot of noise thanks to the targa coupe's "greenhouse." Any vehicle with that sort of greenhouse - a rear hatch that has no seats - is going to experience some additional wind and road noise by nature. The convertibles and FRCs/Z06s do not have the same noise thanks to the lesser greenhouse behind the occupants. I have a daily driver hatchback that has one of those trunk cover partitions and every time I remove it I can hear swooshing and swirling sounds in the back.
Per above, the rear "tub" is an SMC fiberglass style structure that has some sound proofing material present but not a lot. Sound proofing it will remove some of the road noise and possibly reducing the swirling effect to a degree, but you're not reducing the greenhouse from the cabin.
If your car has both tops then you can keep one of the tops in the rear. That reduces the overall space that the greenhouse takes up, at expense of losing that storage space and adding weight. Another option may be to purchase one of the partitions you see for sale by vendors. Some make them for targa coupes and having a protrusion between the cabin and rear trunk area will help reduce swirling sounds.
I have a daily driver hatchback that has one of those trunk cover partitions and every time I remove it I can hear swooshing and swirling sounds in the back.
Thanks for the in-depth input, makes sense. it is a pretty large open area back there...
Do you have any idea where I could find this partition that you are talking about? the only thing I have seen is the 'Cargo Shade' which is a fabric piece that attatches to the hatch and looks a little like a hammock, supposedly to keep your car cooler & hide the cargo.
One partition out there is made by Crazy Cowboy. That's his handle on corvetteforum. I have one of his. Along with the cargo shade it helps reduce noise from the rear hatch area.
Get in touch with him on here and he will give you more information. This partition works very well.
The Outlaw
Also if you are running run flats they seem to make more noise vs non run flats, the rockers are hollow I fixed a lot of noise by taking the access panel off and spray foaming them stops the factory echo chamber.
If you really want to block off sound from the rear, you will need a partition that goes from floor to roof - just a regular cargo partition will not do it. I've also read on here previously that a lot of noise comes through the rear vertical partition. I forget who posted it, but he had done a lot to make a real impact on interior noise. You will have to search.
Personally, I don't buy that just because there is a big area back there it will be noisy. I used to run a Fox Mustang hatchback - a big open area back there also, but the C5 noise level is significantly higher.
If you really want to block off sound from the rear, you will need a partition that goes from floor to roof - just a regular cargo partition will not do it. I've also read on here previously that a lot of noise comes through the rear vertical partition. I forget who posted it, but he had done a lot to make a real impact on interior noise. You will have to search.
Personally, I don't buy that just because there is a big area back there it will be noisy. I used to run a Fox Mustang hatchback - a big open area back there also, but the C5 noise level is significantly higher.
Big tires + wheelwells that you're sitting very close to make a big difference in perception of road noise.
Big tires + wheelwells that you're sitting very close to make a big difference in perception of road noise.
Come for a ride in the rear seats of our "family" car - 18" rims. big, low profile tires, yet almost no tire noise makes in into the cabin. You are just as close if not closer to the rear tires as in a C5. It really is a matter of the manufacturer deciding to take sound insulation seriously. Trouble is, it adds weight.
It's the ghost of the previous owner. Call a medium to resolve it. Lol.
I did sound deadening. There are pre cut kits out there.... And I used one for the cabin.... But I had bought sound matting from an audio dealer some time ago and did the trunk and doors with it. Adds weight, but a bit quieter. Also put some between the inner wheel well shrouds and the fiberglass trunk tub. Pretty easy to do.
I did something similar in preparation for a stereo. The carpet in the rear comes out easier than I thought it would. I placed squares of thinner 50 mil (to save weight) butyl sound deadening mat strategically in the back and behind the seats covering about 50%. Then I covered the cargo area almost completely with neoprene insulation (this stuff is really light weight). The back wall and fenders are where most of the noise was coming from. There was noise coming from the storage areas too so I stuck a sub woofer in the center one and tools in the sine ones. You cant get much insulation in the storage cubby holes or the carpet wont fit right.
I ordered 48sqft of 50mil butyl/aluminum sheeting.
I am currently building a 1/2 height divider, 12" high, it is level with the top of the tub with the hatch open, Im incorporating a cargo/storage unit into the divider.
Depending how that goes, I will order some neoprene.
It definitely made a big difference for me. It took all of a minute to put in my car and did have a noticeable effect on the sound. Great product.
Originally Posted by thptrek
I installed the Blockit sound insulation mat and the behind the seat panels this weekend and I am very impressed. The mat just goes in the hatch area and the fit is excellent. I installed the two panels that go behind the seats behind the carpet. The carpet in that area is not tacked down so it is easy to do.
The mat looks very polished in the rear cargo area so I don't think that I will add an aftermarket cargo mat on top of it.
While commuting to work this morning on the freeway I really did notice a difference. I did not have to crank the radio way up and the voices and music were much clearer.
If you are looking for a real easy sound insulation solution I would recommend this product.
Originally Posted by C6Vette2009
Great product! It does work. I also bought the LLoyds cargo mat for the hatch and now the car is super quiet. It's worth the money!
Originally Posted by snowman0920
I just put one in my '05 coupe. The difference in interior sound was instantly noticable. After cranking it up I had to put the window down a little to make sure the engine was running OK.
Originally Posted by Joy c7
Worth it, made a big difference.
It did however, take me double the 30 second recommended install time, due to me flopping it in there upside down and then having to take it out and flip it over because I didn't read the instructions.
Originally Posted by casting kid
I install on my 2005 and could tell a difference immediately. Now I know when the wife is in the car!Great product, does what Ed claims.
Originally Posted by RtStuf
Very pleased w this addition!
Originally Posted by Brian@RPT
I have had mine over a year and love it.
Originally Posted by barduch
Very evident reduction of noise level. Easy install under the factory carpet behind the seats as per the instructions and the rear mat was cut to perfection. Well worth the $ spent.
Originally Posted by vince48
Ed,
I finally received my Block It yesterday. Install was less than 10 minutes and YES it does make a differents. Well worth the wait.
Vincent
Originally Posted by Nick996
I got mine yesterday and installed it last night.
First drive to work this morning and I can tell you it makes a big difference. Those that say it doesn't must have some really frickn' loud exhausts.
It took the resonance away that the road puts through the rear hatch area (hatch floor, plastic) and the road noise from the tires is probably cut in half.
There's also a noticeable "quietness" inside the rear now that I never had before. I always had that "white noise" behind my head from all the noises coming from the rear hatch area. Now it sounds like the entire car is quieter.
It made such a difference I am no longer worried about putting dynamat or peel and seal in my car. I will however still do the peel and seal on the floor boards under the car because now that the rear is so much quiter I hear road noise from under the car... lol.
Overall, it's a great buy and I'm glad I bought mine!!
Originally Posted by iridelow
To start with, I am not a vender and do not sell these things, but WOW! What a difference. I have an 05 vert with borla stingers and love the sound. But on the interstate and highway speeds, the car is just kind of loud. Not just from the exhaust, but from road noise. So I bought the new "blockit' insolation kit sold here on the forum. Not the kind that requires you to remove the carpet or anything. Just put two pads behind the seats and one pad in you truck, or cargo area for a coupe. I drove my car at 70+ MPH for a good ways last night and WOW!!! Much smoother and peacefull sound. The stereo sounded better and the car just seems so much quieter in the cab area. I have had a C6 coupe and now have a C6 vert, and I promise you, this thing works! Just wanted to shout out a nice mod.
Originally Posted by BB 2005
installed yesterday, wife noticed the difference! Works for me. Seems to work despite the lack of software or complex electronics
Originally Posted by C607RF
I received the BLOCKIT from TKO Performance just in time for
me to test it on a run to NCM. Install was a snap.
Good product, promptly shipped,
The noise difference is very noticeable and makes the Bose sound better. I am very happy with this
purchase.."
Rich, Cinn. OHIO
Originally Posted by Wass
I was at Carlisle and the Blockit was sold out, so I bought the demo kit that was inside the Corvette parked under the TKO tent. In my opinion, it was worth it because it works. My C6 is very loud, as it is cammed, etc., with headers & NPP. It has an annoying low rpm drone. With muffler flaps open it is unbearable for cruising below 1,950 rpms. Even with flaps closed, the drone was very annoying below 1,950. Most of my cruising is between 1,700 and 1,950 rpms in 6th gear with 4.10 gears. With the blockit installed, the drone is gone at these rpms with flaps closed. Not just reduced, but gone. Below 1,700 drone is reduced to a bearable level.
With muffler flaps open the drone is reduced with the kit, but still louder than my comfort level. But it's a moot point now.
Originally Posted by LOUSVETTE
Worth the couple of bucks it costs
Originally Posted by okbkvette
Did it myself last week. Like it. I also put the pieces behind the seats UNDER the carpet. Cleaner look.
Originally Posted by Dif
I have it also and give it a
Glad I got it and it makes a nice difference
Originally Posted by T's C6
Originally Posted by laread
I bought it from TKO as part of the group purchase. I think it is well worth the investment. It really reduces cabin noise from the Goodyear run flat tires.
Originally Posted by Jakeross
I have had mine installed about a week. The noise difference is very noticable and makes the Bose sound better. I am very happy with this purchase. Not able to tell about the cabin heat since it has been in tthe 100's here.
Originally Posted by 9C1
I'm happy with my BLOCKIT drop in kit. I have had it on several road trips and it does work. Easy install too. I can't say about the heat. It was relatively cool last few weeks. Now Summer is here.
Originally Posted by rpoz06
Having had Blockit in my Z06 - I thought it did a great job reducing noise so I added it to the C7 - Z51.
It arrived packaged well. Easy install with a precise fit. I was able to use the rings and shade. I found it able to make a nice noise reduction on all surfaces around Little Rock including interstate and different road surfaces including concrete and asphalt.
I'm very happy with the product!
Originally Posted by doopoco
…..On rough pavement we can actually have a conversation without yelling. Stereo sounds great but we can still hear and feel that awesome exhaust!
Thanks TKO
Originally Posted by Boiler2
Installed on my C7 Z06. TRANSFORMATIONAL! The reduction in tire noise is astonishing. Being an engineer I had planned to use my laboratory dB meter to measure noise levels with and without the TKO Blockit kit. As it turns out there is no need to do so because the noise reduction is truly dramatic. This kit is a "must have" for all but deaf C7 owners. I had a '14 Z51 which had hellacious tire noise. I was exhausted after driving it for 3-4 hours. The '15 Z06 was significantly quieter and rides more smoothly....think Chevy vehicle engineers softened the suspension bushings. Seems to be well known that the '15 is a quieter car. Just can't believe how such a relatively inexpensive and easily installed kit can be so effective. I could now drive the car across country....yes, it's that good.
Originally Posted by Spinny
I have used this product on my C6 and C7 and am very satisfied. It works as advertised.
Originally Posted by tome
Well, I had a chance to test drive my car on some roads that previously had some serious tire noise due to the road conditions. For the ease of installation and simpleness of the product; I'm very pleased with the it. I was able to lower my radio volume from where it used to be, and hold conversations without raising my voice. In fact I am now aware of other noises that I hadn't previously heard.
So bottom line: I'd recommend(your hearing my vary) .
I can't say it's equal to the kits that require full interior dis-assembly since I didn't do that, but I definitely feel there is value in the product. If you are in Southern Calif and want to try in your car, come by and we'll throw it in and you can hear for yourself. Or just take my car for a test drive.
Tom
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Originally Posted by GizmoZ
I ordered two sets of the three piece kit-- one for me and one for my dad. We both agree that there is absolutely a noticeable difference after the mats were installed. The car is noticeably quieter at highway speeds. We're both happy with them!
Originally Posted by GizmoZ
We're still happy with ours. Definitely takes the edge off tire noise/rumble on the highway.
Originally Posted by MRHTRD
Received my set of sound deadeners yesterday and promptly installed them in about 10 minutes.
Started the car in my garage and could hardly hear the exhaust with the windows up. Backed it outside ( a lot of snow here now ) and tried the same thing, windows down ,windows up. I will not get to take the Z06 out until spring, but I can tell you that there is a substantial difference in the noise factor just sitting in the car and listening to it run.
Great product. Can't wait to do a more extensive test in the spring, but initially this seems to be a great product !!
Many thanks,
Dave
Originally Posted by txapezl1
Got mine in today. 5 minute install. Works great. Fit and finish on point. Nicely done. Highly recommend. Not a bad way to spend $220. (In my Toretto voice).
Originally Posted by griff122
I just installed mine (took about 2 min) and the difference is night and day. Definitely recommend.
Originally Posted by joemessman
I installed the basic 3 piece set and they really cut down on the road and noise.
Originally Posted by tr6drvr
3pc set with aftermarket carpet on top in hatch works great. Almost too great for exhaust sound.
I installed Mich A/S tires which helped a lot but the Block-it mats finished the job. Almost no road and tire noise. And I still have the deadmats to install if I want.
Originally Posted by iew
I can now carry a conversation and listen to radio. The Blockit Kit was super easy to install maybe 5 minutes. Amazing reduction of road noise.
Originally Posted by The Sea
Got mine for my 16 coupe and works like a charm..Very easy to install.
Jerry in Minnesota.
Originally Posted by zras01
I added the "blockit" to my 2008 C6 and it made a huge difference in the cabin noise. I can actually have a conversation and/or listen to the radio without the overwhelming road noise that is usually generated in the cargo area. Great Product.
Originally Posted by mtaxman
Just got my Blockit mats today and did a roadtest on the concrete I16 around Savannah and a couple miles on local black top.
Super easy install - drop in and forget it. I have a coupe.
Big rear mat had the slits for rings.
Put my Stingray logo rear carpet on top of the mat and also put the mats behind the seats.
I can tell a difference in noise ; can hear the radio better and believe a long cruise will be far more pleasant.
Originally Posted by joemessman
I have the Blockit mats. My wife can hear like you wouldn't believe. She is the perfect test for these. She stated to me that there was a significant difference in sound reduction. That's good enough for me. I thought there was a difference too, but I didn't want to rule out wishful thinking on my part so I had her listen before and after.
Originally Posted by NSC5
I put it in my 2016 Z06 last week and the difference is very noticeable. Less tire noise, radio volume setting is lower now and much more enjoyable. As another poster noted the exhaust sound now stands out more; my Z06 exhaust is normally set to track mode.
I did notice the action of the Bose audio pilot (auto volume compensation) is much more noticeable now and I turned it off.
Pics look good. I've thought of making my own, too. Interesting design with the angled back. Is this a drop in design, or are you securing it somehow?
What are you doing for finish? Carpet? Matching to factory? Other?
I decided on the laid back angle to match the angle of the backing behind the seats.
I have no plans to secure it, it is removable, it is shape fitted to the wheel wells so it cant really go anywhere side to side, and once its carpeted (im using black subwoofer carpet) it will be a fairly tight fit.
I added the two small pieces at the back to stop it from potentially flipping backwards.
I have driven with it in the car as is, and even though I dont drive on the limit, I am known to not slow down for corners. and it didnt move at all.
My motivation behind building this was purely costs. while Im not poor, I like making my own stuff when I can save.
I was thinking about buying a divider that I had seen, and a cargo organizer, but together they were almost $250.
My unit once completed will be approx $40 and will be one unit rather than two separate pieces.
1/2" MDF 4' x 2' $10
8' x 4' Black speaker carpet $17.99
Spray Adhesive $9.99
Plus a few screws and wood glue I had in my garage..
Last edited by aussie_g; Jun 18, 2017 at 06:01 PM.
Coupe noise reduction - advice please
Great product, does what Ed claims.
I have an 05 vert with borla stingers and love the sound. But on the interstate and highway speeds, the car is just kind of loud. Not just from the exhaust, but from road noise. So I bought the new "blockit' insolation kit sold here on the forum. Not the kind that requires you to remove the carpet or anything. Just put two pads behind the seats and one pad in you truck, or cargo area for a coupe. I drove my car at 70+ MPH for a good ways last night and WOW!!! Much smoother and peacefull sound. The stereo sounded better and the car just seems so much quieter in the cab area. I have had a C6 coupe and now have a C6 vert, and I promise you, this thing works! Just wanted to shout out a nice mod.
