Sound deadening?

spope · 16-09-2005, 06:26 PM

Well, it looks like I might be keeping the EA for a while now, so I'd like to do something about making it nicer to drive.
So this is a two part post, really.

Which door rubbers are generally regarded to be the best, in terms of sealing and reducing wind noise? ED? Or EL? And there is some special trick I beleive to fitting EL rear rubbers to an EA - anyone know what it is?

The other question is, what have people used, or what do people reccomended to use as insulation? I am referring to insulation/sound deadening to go under the carpet, on the inside of the firewall, inside the door shells, on the boot lid, and in the spare wheel well. I guess some of the guys with car audio experience may be able to answer this as well.
I know tru-fit carpets make bitumen underlay, has anyone used that? Any good?

And are there any other ways to reduce road noise? I already have eb mirrors, which helped, I'm running good tyres at the front, not sure what else to try.

Any info is appreciated.

Rmyers · 16-09-2005, 06:32 PM

Myself and thanatos have used bitumen underlay in our cars. We used these on my friends skyline's doors aswell, great stuff, but is a bit of a pain to fit in e-series door trims as there is fVck all room. My entire floor pan and sides of the boot are covered in this stuff. Thanatos it in his door trims but i just used EF ghia stuff in my doors as i couldn't be bothered getting the stuff to fit...

Brent-EA Ghia · 16-09-2005, 08:35 PM

Did it make much difference to road noise Rymers?

Rmyers · 16-09-2005, 09:36 PM

Yup, and it made a big difference to what the stereo sounded like from the outside aswell, you can barely hear it any more....

InitialD · 16-09-2005, 09:48 PM

yeah the sound deadening in Dave's ea is great. Just not fond of the HEAVY doors :P

XRated · 17-09-2005, 01:40 AM

Heavy doors are cool :P

I'd use bitumen underlay under the carpet, and in the boot etc. And if you have the cash, look for something like Brownbread - it is a sound dampener and moulds brilliantly to bumps, lumps etc when heated slightly. It has made a BIG difference in my front doors, and I am planning on adding 300% more of the stuff to the doors!

Walkinshaw · 17-09-2005, 02:20 AM

Look into stuff called G-Spot Sound Deadening or Brownbread.

Or if you use your wallet as a pillow Dynamat or Focal Plain Chant

Rmyers · 17-09-2005, 03:56 AM

Quote:

Originally Posted by Walkinshaw

Look into stuff called G-Spot Sound Deadening or Brownbread.

Or if you use your wallet as a pillow Dynamat or Focal Plain Chant

Hmm, should i consider myself a nut due to the fact that i have every sound deadening mentioned in this thread somewere in my car??? (cept dynamat)

spope · 17-09-2005, 09:54 AM

Quote:

Originally Posted by Walkinshaw

Or if you use your wallet as a pillow Dynamat or Focal Plain Chant

I'm not quite that keen - I've seen how much Dynamat costs, and it's a little out of my price range.
I'm not trying to win SPL contests or anything, just wanna reduce road noise a bit - and the bitumen underlay looks reasonable enough.

Papa Smurf · 17-09-2005, 10:28 AM

There is something that you could use for Rubbers. Ef onwards have a seal that is fitted on the sill. The only problem is the clips to hold it require a rectangular slot to fit into on the sill. The ED Door Rubbers are better and the Roof rail rubbers from an ED-EF as well. They play a big part in keeping a lot of noise out. You could also CAREFULLY bend the top of the doors a little to make them seal better? There is an extra two seals per side on late ED and EF,EL that will assist. They are small and fit at the front of the front doors and on the front A pillar.

What the other blokes said about the Bitumin paper and other sound deadening is MOST useful as well.

(BTW, these parts ARE still available Genuine Ford. Also, be careful Bending the door tops?)

:

**Polyal** · 17-09-2005, 11:36 AM

hmm sound deadening is interesting...but how much does this stuff end up weighing? Our cars are not enzo's but a falcon really doesn't need anymore weight..it would want to be a drastic improvement!

spope · 17-09-2005, 03:33 PM

Just got back from the wreckers with two front door seals, $9 each. Also picked up those little rubbers that go inside the a-pillar.
From looking, the EA seal is by far the skinnest - EB2 seemed much better, but the EF seal was the fattest that I found. Didn't see any EDs so I couldn't check.
Papa smurf: Saw that lower sill rubber on the EF as well, I'll go back next week and grab one to give it a whirl. I didn't see any good drip rail moulds on EF's so I gotta find a couple of them too.
Polyal: I know from what I've researched that sound deadening can end up weighing quite a bit. But it comes down to what you want out of your car.

For me, I like as much refinement and luxury for as little cost as possible. A slight increase in fuel consumption is a fair price to pay.

Rmyers · 17-09-2005, 08:09 PM

Quote:

Originally Posted by Polyal

hmm sound deadening is interesting...but how much does this stuff end up weighing? Our cars are not enzo's but a falcon really doesn't need anymore weight..it would want to be a drastic improvement!

All depends on how nuts you go and what stuff you use. Mine ends up weighing about 35kg or so but my sound deadening is quite extreme. I have heard of 50kg's of the stuff going into an e-series, but that's the most i've heard of (would love to do it tho :P). I think a roll of bitumen material ended weighing something like 6kg if i remember correctly, and this will do a decent size area, so i can't see it weing more than around 16kg if you were to do a once over of your whole car.

ilsautomotive · 17-09-2005, 08:34 PM

If you want to see the ultimate sound deadening thread, check out this guy in the US did:

http://forums.caraudio.com/vb/showthread.php?t=113534

TIKFD6 · 17-09-2005, 08:49 PM

I used the foil backed bitumen deadning that we sell at work(Jaycar), my bootlid floor and walls are covered.It works very well, doors are the next things that will be done.