Pulled the trigger on a 3.8 RS inspired 964 - development journal
Thread Starter
Race Car
Joined: Nov 2011
Posts: 4,356
Likes: 49
From: Cape Town, RSA & Sarasota FL
Got 6,9,18mm thickness so I can try double it in places ie firewall ... Density of 45
Only issue is making sure the glue is upto the task re the aluminum, but it went on with little grooves and folds so lots to purchase on
Cheers Jack ... we're both graduating to over the 'big mod hump' together it seems
Sounds just about right Paul... I'll be back to that side of the equation in a week or two I hope
Here's my ground control to major Tom moment!
Idle DBs down from 78 to 72 ...
As the scale is geometric that's quite a lot ...
But the foil is mainly there to kill reverb and vibration...
Will be very happy if I get back or close to stock noise levels ie post cat delete and free flows ...
quieter than that and I'll get the wife and little one to come for long trips more often
Thanks for all the encouragement and kind words all
Three Wheelin'
Joined: Jan 2007
Posts: 1,748
Likes: 33
From: London UK & Paris FR
Very interesting ,
I know exactly what you mean, I love when we go on hols with my wife and kid...
Love your NASA STYLE space ship picture , I would probably do the same when I will fit RS carpets
I know exactly what you mean, I love when we go on hols with my wife and kid...
Love your NASA STYLE space ship picture , I would probably do the same when I will fit RS carpets
Thread Starter
Race Car
Joined: Nov 2011
Posts: 4,356
Likes: 49
From: Cape Town, RSA & Sarasota FL
Great Pierre ... Racing the Extreme as part of the international historics tour? Let me know and I can try get you into our pits on main pit lane ... Or are you with the 917s and 956s!?
Burning Brakes
Joined: Oct 2003
Posts: 884
Likes: 0
From: Durban, South Africa
You racing your GT3 in Extreme?
Addict
Rennlist Member
Rennlist Member
Joined: Apr 2002
Posts: 6,229
Likes: 171
From: Boston
Three Wheelin'
Joined: Jan 2013
Posts: 1,609
Likes: 9
From: Bucks
>That's it Rob - bought the closed cell foam today - 5kgs for 2 964s worth ...
>Got 6,9,18mm thickness so I can try double it in places ie firewall ... Density of 45
Did you source locally or eBay? Some I've seen is adhesive backed which provided the adhesive is good may be preferable since you'll use less spray adhesive.
Does the foam provide anything quantifiable in the way of sound proofing? Or is that all down to the left over wall paper from the mir space station
>Got 6,9,18mm thickness so I can try double it in places ie firewall ... Density of 45
Did you source locally or eBay? Some I've seen is adhesive backed which provided the adhesive is good may be preferable since you'll use less spray adhesive.
Does the foam provide anything quantifiable in the way of sound proofing? Or is that all down to the left over wall paper from the mir space station
Burning Brakes
Joined: Oct 2003
Posts: 884
Likes: 0
From: Durban, South Africa
(Sorry HiWind)
20131224_145936_zpsd6d95248.jpg
20131116_134233_zpsbbfe0b69.jpg
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Thinking of Buying a Porsche? Do These 10 Things First
Joe Kucinski
Pixar Pals Turned Into 1-of-1 Porsches!
Michael S. Palmer
Theon Goes Full Carbon Fiber With Stunning New Build
Verdad Gallardo
Genius Porsche-Themed Gifts That'll Make Any Dad or Grad Smile
Joe Kucinski
10 Used Porsches Are Selling for Way Too Cheap
Joe Kucinski
Tuner Is Converting Porsche 911s Into Shooting Brakes
Verdad Gallardo
This Coachbuilt Creation Is A Modern Take on the Legendary Porsche 917
Verdad Gallardo
Is This Convertible Cayenne A Steal, Or A Returnless Investment?
Verdad Gallardo
10 Best Non-Flat Six Porsches You Can Buy For Under $100K
Joe Kucinski
Thread Starter
Race Car
Joined: Nov 2011
Posts: 4,356
Likes: 49
From: Cape Town, RSA & Sarasota FL
Robt: I got it from the manufacturer and decided to go with non adhesive backed as I want to use something I know will stick. Aviation glue allows you to slide and reposition for the first minute or 2 so I figured that would help get the foam seated/worked/wedged in best.
The foam IS the main sound deadener from what I've read, with the bitumen-foil being there to lower reverb and transmission of rattles etc.. Effectively lowering the 'tininess' of the body. Per 80/20 rule you don't need to cover entire surface, just strips on 50-60% of the surface to achieve most of the density gain ... But it's more spaceship this way
KenD, Pierre: go ahead, perfect car - white, Carrera stripe, modeled on RS, M&R built engine ... Pierre's thread could have the same title as this one but w/o the 964 Pierre do you have a pic with yr 964 side by side the new one? Ps pm sent.
The foam IS the main sound deadener from what I've read, with the bitumen-foil being there to lower reverb and transmission of rattles etc.. Effectively lowering the 'tininess' of the body. Per 80/20 rule you don't need to cover entire surface, just strips on 50-60% of the surface to achieve most of the density gain ... But it's more spaceship this way
KenD, Pierre: go ahead, perfect car - white, Carrera stripe, modeled on RS, M&R built engine ... Pierre's thread could have the same title as this one but w/o the 964
Pierre do you have a pic with yr 964 side by side the new one? Ps pm sent.
Thread Starter
Race Car
Joined: Nov 2011
Posts: 4,356
Likes: 49
From: Cape Town, RSA & Sarasota FL
There are 3 ways to look at this:
1. either I'm not going to have any of cell fon reception in the car, or
2. Houston, I'm ready for count down
3. I have Disco fever!
Foam & Carpet begins today.
Also will get a decibel reading at 2k revs - was 79 then 75, now ??? and then some open road tests too.
Now I shd add that the audio guys don't believe in covering everything with the bitumyl/foil products.
http://www.sounddeadenershowdown.com/ ... talking their own book to a degree
I figured that I'd use what I had bought and budget 5kg of new material - which is what I have here with a bit left over.
The science is that you can dampen reverb and vibration this way but you cannot barrier noise.
I was surprised by the (app store) decibel readings ... but they did drop and egine tone was noticeably less "airy"/windy.
But Mass Loaded Vinyl (MLV), while effective and Rolls Roycey is very heavy .. so for now I'm going with Velcro/Glue mounted closed cell foam.
1. either I'm not going to have any of cell fon reception in the car, or
2. Houston, I'm ready for count down
3. I have Disco fever!
Foam & Carpet begins today.
Also will get a decibel reading at 2k revs - was 79 then 75, now ??? and then some open road tests too.
Now I shd add that the audio guys don't believe in covering everything with the bitumyl/foil products.
http://www.sounddeadenershowdown.com/ ... talking their own book to a degree
I figured that I'd use what I had bought and budget 5kg of new material - which is what I have here with a bit left over.
The science is that you can dampen reverb and vibration this way but you cannot barrier noise.
I was surprised by the (app store) decibel readings ... but they did drop and egine tone was noticeably less "airy"/windy.
But Mass Loaded Vinyl (MLV), while effective and Rolls Roycey is very heavy .. so for now I'm going with Velcro/Glue mounted closed cell foam.
Last edited by HiWind; Feb 1, 2014 at 01:24 AM.
