Well, I'm having serious second thoughts about my plan to turn my 968 into a dedicated track car, so, since I have the drivers side door panel off (to replace the door loct actuator), I think I will go ahead and add some sound deadening material to the inside of the door, at least if the consensus is that it will make a noticeable difference in the level and quality of the road noise entering the cabin. So, are there any tips on how/where to apply the stuff inside the panel, or do I just stick it in there anywhere I can reach? And what brand/type material do you guys recommend? Thanks.
line the sheet metal of the outside surface, NOT the surface the door panel goes up against - this is a painful and difficult process, and you will be screaming about the tight spaces and how much of a pain it is to get the roller in there, but it will be worth it in the end
dynamat extreme - accept no substitutes if you want all of the performance - there are a couple of other products out there that get most of it though for less money (fat mat, etc)
it takes a full sheet to do each door - i generally buy the big box, and that will cover every part of the car you can get to
Thanks for the great answer. Any idea, as best can be conveyed over a non-auditory medium like this one, how much improvement can be expected by putting sound deadening material in both the doors of a coupe, if I forego putting any in the hatch area? It seems that most of the din is coming from the back (I recently rode in an early-2000's BMW M Coupe, which has a similar rear hatch layout as the 968 coupe, and the level and quality of the rod noise was eerily similar).
So, let's say that putting dynatmat extreme in every place it is possible to put in a 968 coupe (without doing any serious dissasembly of the bodywork, other than removing interior panels) provides 100% of the achieveable noise reduction, as perceived by people riding in the drivers and passengers seats. Of that 100%, what percentage would you say would come from doing only the doors? Thanks.
Thanks; that looks like the ticket. I remember Flash helped DS968 install this stuff very extensively throughout his car, and that it made a huge difference in the level of road noise.
FYI, I bought 50 sq ft. of B-Quiet Ulimate and I still have ~15-17 sq ft left after doing the doors, under the back seat and all of the rear including the 2 cubbies.
What's the difference between Dynamat Xtreme and B-Quiet Ultimate?
b-quiet gets about 75% of the effect of dynamat extreme, but costs about half the cost (though you can get some pretty good deals on extreme if you shop) - it's up to you to determine just how much you want to kill in there, and if the extra 25% is that important
Thanks; you're right about the opportunity to get a good deal on Dynamat Xtreme - I found a huge disparity in prices from just the quick search I did last night.
yup - so, if you shop around, the difference in price isn't so much
i've seen both, and heard both - they are similar in appearance and seemingly construction, but there does seem to be a difference - b-quiet is a good product, and i'm not slagging it at all - extreme is just better - as much of a pain as it was to do, i opted to use the best thing i could get, and not have to go back in there
This table shouldn't be subjective (one never knows) but it does show the B-Quiet Ultimate performs better that Dynamat above 20C and it's less than 1/2 the price.
http://www.b-quiet.com/compare.html
i love those misleading charts
did you notice there is no chart showing a comparison against dynamat extreme with the actual db loss at any particular frequency?
it's like those danged oil charts
Flash, why do you say you should line the outside sheet metal? On the picture in Porsche's link the dynamat is installed on the metal that sits under the door card.
It does seem a lot easier doing it like in the picture...
it is easier - but it isn't as effective - in fact, that works against what you are trying to do, which is deaden the outside noise - in lining the surface the door panel mounts to, you essentially create a resonance chamber in the door - very bad
I have a question I've never seen asked before. I've finally finished the projects on the other family cars (Dad is always at the bottom of the totem pole...), so I'm ready to tackle the Dynamat Xtreme installaion, when something ocurred to me. My doors each have a few dings in them that I need to remove. Do I need to do this before installing the Dynamat? In other words, does anybody know if having Dynamat against the door skins on the inside will get in the way of the paintless dent repair I need to have done? Thanks.
Yes, have any PDR done prior to installing the Dynamat.
- Darryl
Thanks; glad I thought to ask...
@Cloud...I asked that
question a year ago already [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]
There really is nothing new in this world [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img]
Oh man, that means that as soon as I put this stuff in someone will ding the door huh???
you've got those strips on the side, right? so of course they won't ding it. you'll leave it open and back into something and rip it right off the hinges, but there won't be a ding in it, and it will only make a "thud" sound when it hits the ground.