Dynamat Extreme
Discussion
Has anyone tried to dampen down the transmitted noise from the differential ?
I was thinking of adding a sheet of dynamat extreme on the bulkhead behind the seats so to stop the aft bulkhead plate from resonating.
Anyone has done this?
Any better ideas?
The car has no carpets nor mats and is emitting all kind of resonant noises most of them seem to come from the diff which is directly bolted on to the chassis.
I was thinking of adding a sheet of dynamat extreme on the bulkhead behind the seats so to stop the aft bulkhead plate from resonating.
Anyone has done this?
Any better ideas?
The car has no carpets nor mats and is emitting all kind of resonant noises most of them seem to come from the diff which is directly bolted on to the chassis.
Funnily enough I did add some silicon between the aluminium and the square chassis section behind the seat to stop it rattling and that also reduced some of the harshness of the diff noise. There's no doubt that the noises created by the diff are amplified by resonances in the panel work. I suspect some careful checking to see how well you panels are bonded to the chassis would help (but perhaps not eliminate noise)
I wasn’t joking about hearing protection - it doesn’t take much time in the car, with engine, exhaust and wind noise before it starts causing damage. Don’t believe me get a DB app on your phone and test the volume!
If you have some dynamat, stick a bit on and try it. It doesnt need complete coverage to reduce vibrations. If it doesn’t work its just a bit of effort with a plastic scraper and some white spirit to remove it.
Having been an owner for 20+ years I’ve never heard of anyone fitting sound deadening pads but thats not to say someone hasn’t tried it.
If you have some dynamat, stick a bit on and try it. It doesnt need complete coverage to reduce vibrations. If it doesn’t work its just a bit of effort with a plastic scraper and some white spirit to remove it.
Having been an owner for 20+ years I’ve never heard of anyone fitting sound deadening pads but thats not to say someone hasn’t tried it.
Paynewright said:
I wasn’t joking about hearing protection - it doesn’t take much time in the car, with engine, exhaust and wind noise before it starts causing damage. Don’t believe me get a DB app on your phone and test the volume!
If you have some dynamat, stick a bit on and try it. It doesnt need complete coverage to reduce vibrations. If it doesn’t work its just a bit of effort with a plastic scraper and some white spirit to remove it.
Having been an owner for 20+ years I’ve never heard of anyone fitting sound deadening pads but thats not to say someone hasn’t tried it.
I know I am wearing sound cancelling headphones at ALL times.If you have some dynamat, stick a bit on and try it. It doesnt need complete coverage to reduce vibrations. If it doesn’t work its just a bit of effort with a plastic scraper and some white spirit to remove it.
Having been an owner for 20+ years I’ve never heard of anyone fitting sound deadening pads but thats not to say someone hasn’t tried it.
They work a treat.
Strange no one seems to have done this or is there to report ...
DCL said:
Funnily enough I did add some silicon between the aluminium and the square chassis section behind the seat to stop it rattling and that also reduced some of the harshness of the diff noise. There's no doubt that the noises created by the diff are amplified by resonances in the panel work. I suspect some careful checking to see how well you panels are bonded to the chassis would help (but perhaps not eliminate noise)
My thoughts exactly!The subject of the advantages of an LSD has been discussed extensively.
My own personal view is : If the noise generated is so intrusive that it negatively effects your sense of enjoyment, simply fit a standard dif. The noise is present 100% of the time, whereas the advantages of the LSD are apparent mainly when your road driving style is more extreme, or when on track.
My own car has every upgrade except LSD and what I've not had, I've not missed. The fact that I have a fully independent rear suspension set up obviously helps.
My advice - fit a standard dif. It may handle slightly differently but the drive will be just as much fun with no noise, no reliability issues, no additional servicing and the saving of agro and cost of these issues. (These are regularly discussed).
I drive mine now and again. I get great fun and an adrenaline from doing so. As I don't track it, I've never come close to the the limit of adhesion or handling, other than when "playing". I guess that I'm not alone in how I use my 7. There seems to be a great deal of Kudos in having an LSD but not necessary if your use is similar to mine. Try swapping it out and see how you get on.
My own personal view is : If the noise generated is so intrusive that it negatively effects your sense of enjoyment, simply fit a standard dif. The noise is present 100% of the time, whereas the advantages of the LSD are apparent mainly when your road driving style is more extreme, or when on track.
My own car has every upgrade except LSD and what I've not had, I've not missed. The fact that I have a fully independent rear suspension set up obviously helps.
My advice - fit a standard dif. It may handle slightly differently but the drive will be just as much fun with no noise, no reliability issues, no additional servicing and the saving of agro and cost of these issues. (These are regularly discussed).
I drive mine now and again. I get great fun and an adrenaline from doing so. As I don't track it, I've never come close to the the limit of adhesion or handling, other than when "playing". I guess that I'm not alone in how I use my 7. There seems to be a great deal of Kudos in having an LSD but not necessary if your use is similar to mine. Try swapping it out and see how you get on.
analog_me said:
BertBert said:
Then why add the dynamat?
This issue is not how to get around a problem, but how not to have one.
The problem is excessive noise right?
Where and how that noise is prevented from causing hearing damage is largely academic.
Ear plugs are cheaper and lighter.
Or buy a Focus.
the av8er said:
I agree. But not all of the experience is desired by all the people.
Personally, I'd find the constant whining and loud chatter of the dif really annoying
I was just reading this and must agree with av8er, part of the experience i.e. induction and exhaust were fine for me personally but diff noise was terrible, so bad in fact that I could not live with it and had to get rid of the car.Personally, I'd find the constant whining and loud chatter of the dif really annoying
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