want to make a car quieter (wheel wells + under carriage). after how many cans or layers of this stuff will i reach the point of diminishing returns?
1466969
There probably isn't a practical point of "diminishing returns.." The thicker the layer is, the more noise suppression. Some of my pro auto body buddies use similar stuff, and using 3 normal layers seems to be about the norm in classic cars/restoration projects.
1466970
From my use I have found that using more than 1 + 1/2 cans per 1 square foot (approximately) proved pretty much a waste. I would recommend coating the area evenly up to about a 1/4 inch think. If you wanna really get rid of the noise I suggest coating under the trunk mat avoiding the wire and electrical bits.
708782
I have used this on two of my car projects, nice to work with on a fairly flat surface. It has to be glued in place, so I would recommend using on top only. It will make a definite noise reduction for you. You should look into the heat insulation/sound deadener also, it will also help the sound and vibration from the body and can be applied to the under side easily. jon
363881
I use "Parts Express" for larger amounts of sound deadening. Try this trunk kit- https://www.parts-express.com/cascade-tk-1-acoustic-sound-damping-trunk-kit--268-206 It will give you an idea of what amount you need.
2130299
The silencer does work, it does narrow down the sound with it. It doesn't get annoyingly loud with the silencer but it does sound as if the silencer is moving. Honestly, I would take it of but it's your option. I noticed the difference the moment I took it of from the outside and inside of my car.
339874
Sorry, but I can't give you an answer because I'm not sure if they are adding any dampening to my toyota 2003 Echo. Road noise is still quite noticeable even with the windows tightly closed.
2253535
At low-medium it's almost silent. High is not too disruptive, turbo is loud enough it will interfere a bit.
2240474
Thank you for contacting Parts Express. To follow is the Product Description: Acoustic Sound Damping Foam Specially designed acoustic foam to be used in automotive applications. Will not sponge-up water, and resists extreme temperatures. Can be used in place of open cell foam and fiberglass to reduce trunk and door panel resonance. Also helps alleviate buzzes produced by subwoofers. Sold in 18" W x 36" L x 1/4" thick non-adhesive sheets. I hope this answers your question. Kind regards, Customer Service Team
2110055
I did a few things all at once, adding the Airaid was one of them along with cat. back exhaust system. I do get a little better gas mileage, I have less low in torque but more top end. I am happy with it overall, it did change the sound of the car a little. I don't know if this helped at all
1692062
I've heard that using sound deadening material will do exactly what you want for your cart. I included a link below to something that I think would be even better. You're basically adding mass in order to change the harmonic resonance, i.e., stop rattling.GTMAT 12 sqft Constrained Layer Dampener Automotive Audio Sound Dampening Sound Deadener Deadening 80mil ULTRA - Audio Deadening Installation Kit Includes: 12sqft (qty 3 - 36in X 16in sheets), Instruction Sheet, Application Roller, Degreaser, GT MAT DecalsAnd after doing this, if your cart is still too loud, look into a muffler silencer. They are cheap and easy to install and will most definitely cut the noise out. I've heard that using sound deadening material will do exactly what you want for your cart. I included a link below to something that I think would be even better. You're basically adding mass in order to change the harmonic resonance, i.e., stop rattling.GTMAT 12 sqft Constrained Layer Dampener Automotive Audio Sound Dampening Sound Deadener Deadening 80mil ULTRA - Audio Deadening Installation Kit Includes: 12sqft (qty 3 - 36in X 16in sheets), Instruction Sheet, Application Roller, Degreaser, GT MAT DecalsAnd... » Read More I've heard that using sound deadening material will do exactly what you want for your cart. I included a link below to something that I think would be even better. You're basically adding mass in order to change the harmonic resonance, i.e., stop rattling.GTMAT 12 sqft Constrained Layer Dampener Automotive Audio Sound Dampening Sound Deadener Deadening 80mil ULTRA - Audio Deadening Installation Kit Includes: 12sqft (qty 3 - 36in X 16in sheets), Instruction Sheet, Application Roller, Degreaser, GT MAT DecalsAnd after doing this, if your cart is still too loud, look into a muffler silencer. They are cheap and easy to install and will most definitely cut the noise out. « Show Less
1153997
There's a lot of good info on the web- just depends on what you want out of the subs. we did 1.5 per chamber at 40hz http://www.ecoustics.com/electronics/forum/car-audio/699156.html
2164399
I don't think so. You are going to want to keep the material away from the muffler until it cools.
847149
They probably reduce about 95% of the noise around you when fitted correctly. I definitely wouldn't run near traffic in them.
2130298
The silencer is pretty good once you're on the move however on startup the silencer is pretty much useless... The car won't get to the annoyingly 1 mile away loud, but you'll actually get a nice deep growling noise that sounds similar to a WRX STi performance exhaust in tone but not as loud...
551565
I put one coat on my rear wheel wells and I wouldn't say it made a huge difference in sound. However if you used a couple of coats to make a nice thick coating I do think it would help a bit.
1927966
I can't be 100% positive. I've installed this product in numerous highly modified cars and even under the seats of hi po motorcycles. It works! Heat is suppressed , and various noises produced by harmonic imbalance and vibration is lessened noticeably. A semi tractor is most likely not louder than any number of highly modified and powerful cars (such as a Nissan GT-R) or race prepped 370z
862113
One time, break it in half if you have a medium size truck or small car and save one half and the bar will do two cars. Make sure you get some lube to glide it on the surface you don't have to buy anything expensive just some cheap quick Detailer by meguiars/mothers
385738
That's just because of friction between the leather brake and the flywheel. It will get quieter after more use.