964TT

Thanks! The original cushions on the seats are the triple grey ones, I think those will look great as well. But I wanted to have an all black interior option including black 5point seat belts. I almost had the dash covered in leather as well, but decided the original still looks great so why bother.

964TT

Small update of the work being done right now. I'm having everything removed, center console isolation as well.
I think it will be covered in Dynamat (strategically) and some other material on the rear barrier where the engine is for heat insulation.
Maybe I'll just have all old insulation removed and do the whole thing new...

964TT

Some more progress, unfortunately they took the damping of the doors by mistake...now it has to be redone. Although this weighs quite a bit I just want the great sound!

HiWind

check my thread for liberally applied bitumen flashing - suggested by Robert at Appbiz
as he says there's very little difference between that and dynamat ... beside 400% markup and branding.
I put in 10kgs worth - it covered pretty much everything - but doesnt compare to the stock soundproofing
but is 25kg lighter

964TT

Actually I am not using Dynamat but something similar. The doors need the heavy soundproofing to make them work as a soundbox for the woofer. I am using high quality woofers which make a sub unnecessary, if used in this way.
I really enjoyed having the speakers setup like that, it is a huge difference.
I think I will also use some of this material on the rear wheel arches, just placed strategically (sparingly).
The rest of the car I use bitumen which is much lighter.

964TT

These are the specifics for the bitumen sound proofing material, if anyone has any suggestions or tips please let me know. I hope this is the most efficient way to get the results I want, keeping the weight as low as possible along the way.

964TT

HiWind,
I reread your post, had to look for it a bit. I actually had read it before and I have a question about the insulation material.
My interior guy says the bitumen layer with the carpet is enough. But you used another closed cell foam layer in-between, right?
the bitumen layer is only 2mm thick, I can't imagine this to be enough of a sound proofing solution...
As he is doing the work these days, any quick tips are very welcome!

HiWind

No problem.... Here is my thinking/logic flawed as it may be

Bitumen is a vibration deadener ... Makes the metal 'denser' thereby dulling vibes.
I did 2 layers on firewall and wheel arches as they are the biggest noise areas I've read.
Then I did some close cell foam on rear to provide more noise suppression .... Little extra weight ... Used 6 and 10 mm based on how easily it could fit. Then 2mm rubber over that to smooth it.

Knowing what I know now I'd likely just cut out pieces of closed cell for the 5-6 main surfaces and then use a softer foam over that in 3-5mm to make carpet smoother and provides another layer. Rubber worked to smooth it out but didn't help much at all sound wise - the soft open cell would I think doa better job. Seats and carpet had a material impact tho so I came out at a db level that is alive but still long drive comfortable consider I have vry little mufflers.

hope that helps...apologies I only saw this now

964TT

Thanks! Thats what I understood but my interior guy claims the 2mm bitumen layer is enough...
I don't want to redo it again of course. I do have less exhaust noise with the turbos but engine, road and tire noise are also factors.

964TT

Just got some photos in from the guy who did my gauges, everything is ready.
I had the black rings replaced because they were dented and ugly and all lights checked and replaced. Ended up with ten new lights in the gauges...
Also decided to have the milage at the original milage instead of zeroed. Last time when he worked on the gauges he zeroed the milage because of a miscommunication between us and I thought what the heck, I'll just leave it at that. But after all I rather have the original milage.

964TT

Progress at the upholstery place...looking sharp!

964TT

Doors looking good. Only thing I don't like is the speaker 'edge'. I asked if he can make it look flush, move the speaker forward a bit I mean so there is no edge.
Will look a lot better.

perrew

Everything is coming along nicely on this beautiful build, really like the wheels. But agree you should have that speaker grill flush.

evoderby

Great build! Regarding the speaker, would it be possible to solid mount the speaker in the door before mounting the door panel...do some nice 1-2mm perforations in the leather where the speaker is fitted for a nice and stealthy look.

HiWind

^^ yes, exactly what I'm doing ... using a slightly thicker board for the door card to accomodate just that
but the door shape also helps