05 Focus road noise problem....

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kevox
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05 Focus road noise problem....

Postby kevox » Tue Aug 12, 2008 12:11 am

Ok so I put 3 rolls (193.5 sq. ft. if I'm not mistaken....) of RAAMmat in my friend's '05 Focus last month to do one thing - lower the road noise!! The guy is in his 50's and doesn't want a system - just a quiet car. He says stock it is hard to hear at freeway speeds sometimes and he hates that....so he contracted me to sound deaden the whole thing as I was talking to him about sound deadening as a good means to combat road noise so I did the job...before I say more here are pics to prove that I didn't skip any corners...
Image The trunk was just done with the excess I had after I did a firm 3 layers on the entire cabin floor and 2-3 layers on the outer shell of the doors plus 2 layers on the inner shell of the doors...Even so, I got 2 layers on most of the trunk floor...
Image
Again, I put THREE layers on the entire floor....
Image
Ok apparently I don't have any more pics (camera's battery died halfway through the job and it's battery was not a rechargeable one...) but the 2 passenger's doors were sound deadened equally as much as the driver's side doors pictured above...

I got as far up the firewall as I could - about as high as the pedal mounts on on each side...

My friend says he'd guess the road noise was only reduced by 20% if he had to stick a number to it so he's not too excited about the whole thing so I was wondering if you guys had any other recommendations? I thought there'd be a much bigger difference then that as my car's road noise went down drastically when I put my 2.5 rolls in....and I didn't even finish my doors!


He thinks most of the noise is coming from the firewall...what can I do to help him out here? I dont want him to have spent $636 ($336 parts, $300 labor) and be dissatisfied...
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KU40
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Postby KU40 » Thu Aug 14, 2008 12:17 pm

Maybe should have tried a layer of foam on top of the sound deadener? Sometimes deadening the front wheel wells makes a difference too.

Tell him to get some quiter tires :)

With those small, somewhat cheaply made cars, sometimes noise is a problem as they don't seal up the components going through the firewall very well.
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kevox
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Postby kevox » Thu Aug 14, 2008 1:36 pm

Ya unfortunately I didn't know you could cover up all that sticky goo with a layer of foam until after I did the work! I did a few google searches and found that there are some cheap spray-on deadeners you can get from Schuck's (forget the name though) and then just coat the underside of the tire well fenders with for some low-but-noticeable results so I'm going to suggest that to him...
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Postby jlaine » Fri Aug 15, 2008 2:04 am

Kevox -

Big thing that isn't mentioned and needs to be drawn attention to:

Tires on vehicle.

Lots of winter/all terrain tires are so hard/gritty that they are noisy as heck.

May not be the install but the equipment on the car.

JL
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kevox
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Postby kevox » Wed Aug 20, 2008 3:42 am

jlaine wrote:Kevox -

Big thing that isn't mentioned and needs to be drawn attention to:

Tires on vehicle.

Lots of winter/all terrain tires are so hard/gritty that they are noisy as heck.

May not be the install but the equipment on the car.

JL


Alright man I'll mention that to him as well...might as well I mean so far I only have 3 ways to combat his noise problem:
1 - deaden the interior - DONE
2 - deaden the underside of the tire well fenders - mentioned it to him a couple days ago and told him it was a cheap thing to try...
3 - try different tires - who knows how he'll respond to this one.


Thanks for the help...it's more than I could think of when I created this thread!
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Postby jlaine » Wed Aug 20, 2008 9:14 am

kevox wrote:Alright man I'll mention that to him as well...might as well I mean so far I only have 3 ways to combat his noise problem:
1 - deaden the interior - DONE
2 - deaden the underside of the tire well fenders - mentioned it to him a couple days ago and told him it was a cheap thing to try...
3 - try different tires - who knows how he'll respond to this one.


Thanks for the help...it's more than I could think of when I created this thread!


Well I just know a lot of audio buffs like to trick out the outside too...

Stiffer suspension + lower profile tires are going to increase road noise dramatically.

Swapping from my summer tires to winter tires on my 300m is a hideous difference in the cabin noise during regular travel.
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Postby TalNLnky » Wed Aug 20, 2008 1:21 pm

Duplicolor underbody ruberized spray... thats what i did to my 08 yaris hatch. 1 can to each wheel well.

Trick is to spray a thin amount the entire surface.. and then let it dry... you still live on the wet side of the state, so you might have trouble getting it to cure/dry fast enough. If you have a sunny hot day... use it. If you just spray it all on at once... it'll be soft... like dough almost and will take weeks to cure... or maybe won't even fully cure.

Cans are like $4 a pop at fred myers.

i live in eugene now.. recently moved from spokane... so its starting to be rainy, and i'm about to start teaching so i'm working & stressing again... SO... i'll wait until next year to spray the entire underbody of the car with those duplicolor cans... I figure... if nothing else, it'll help reduce the chance of rust or any damange in general to the underside of the car. and thats worth the $20 or so i'll spend on it.



like people have said tho.. Tires can make a huge difference... tho west siders usually don't run special tires since you never have snow....

Also... the lil strut towers and wheel wells on the inside of the car should always be hit up with mat... and yeah... i think foam would help too.

I have talked to guys who drive semi-trucks who've dynamatted with awesome results... so.... this focus should sow results as well too.


I recently put 1 pack (60sq ft) of raammat + 40sq feet of foam on my 08 yaris and I messed up by not doing the firewall because it sounded solid.... i did the hatch, wheel wells, and the floorsfrom the pedals back... also did the side panels behind the front seats.... I hear no noise from the back... but i hear a decent amount of noise from firewall & wheels... This just means when i pick up another roll of mat & foam for the doors, that i'll be putting some on the firewall, Thing is a ***** to get to unfortunately because of the way the carpet is made.

Its possible that you focused to much on doing the install evenly instead of focusing on whats close to his head.... the rear seats will help reduce the noise in the back.... so in my experience... do a 60/40, and not even... unless of course you got say 4 rolls to kill.


EDIT: oh yeah... as far as the door goes... from your pictures... it looks like you focused on the wrong part of the door. Flat panels without curves/bends/welds are whats going to be most susceptible to noise. That means the outside layer of the door should be hit up first with mat. I mean the layer that gets warmed up by the sun if its sitting in a parking lot. the side that people see... From what i can see.. you did in the inside panel. which the door trim attaches too, which is also nice to hit.. but is a secondary place, not primary.
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kevox
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Postby kevox » Wed Aug 20, 2008 2:19 pm

TalNLnky wrote:
EDIT: oh yeah... as far as the door goes... from your pictures... it looks like you focused on the wrong part of the door. Flat panels without curves/bends/welds are whats going to be most susceptible to noise. That means the outside layer of the door should be hit up first with mat. I mean the layer that gets warmed up by the sun if its sitting in a parking lot. the side that people see... From what i can see.. you did in the inside panel. which the door trim attaches too, which is also nice to hit.. but is a secondary place, not primary.
Oh yeah I know what you're saying there and i did do 2 (and 3 in the majority of the center) layers on the outer door shell and i even thought about the possible lack of effect of the deadening due to the numerous holes in the metal but I Figured it would be better than nothing so I went ahead and did it....
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Postby HawaiianBassHed » Thu Aug 28, 2008 4:14 am

some absorbing stuff over the matt should help imo... I used luxury liner and lux pro... I have a 5.6L truck with 35" mud tires and a flowmaster 40 series and intake and some other stuff so it's pretty loud... I matt'd my doors heavily for audio purposes.. and the floor and back wall for exhaust and road noise. the neoprene did cut it down. so I'd imagine any other absorbers would work the same.. flexible rubber matt is cheap enough to try :D would be made plyable with a heat gun imo :D
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Postby X-OvrDistortion » Fri Aug 29, 2008 9:39 am

Tires...tires...tires...tires...tires....tires.....different car....tires....tires...tires...

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