FLYVMO

I thought about moving my bed into the garage

FLYVMO

Had a few days to do some light work, and started putting the car together. The biggest project is the sound insulation, and it takes quite a bit of material and time. I decided to go with a foundation of SecondSkin Audio's Damplifier Pro on the metal surfaces. This is a very thick damper and much more rigid than the Dynamat Extreme I had used in the past. It is more labor intensive to put in, but it dampens significantly better than Dynamat in my experience. It also has a black (charcoal almost) face, so it blends in better with the black paint.

For materials, the car needs 2 bulk packs (36 sq.ft each) of the Damplifier Pro if you want to do the entire interior and roof panel (no sunroof). I started out by ordering one pack, but that only did half the car and roof panel. EDIT: You will need one more pack as 72 sq.ft is not enough.
The roof alone (non-sunroof) takes four pieces, so I ran out of Damplifier before I could finish the trunk. So a more accurate number should be around 80-90 sq. feet for full coverage.

For the doors, I went with Cascade Audio's VB-2 damper, and it is amazing. It makes the door look like it is dipped in plastic. It is highly recommended to have a helper (my daughter in my case), one applying heat with a hair dryer while the other applies and smooths the surface. It stretches (up to 40%) and conforms to the doors irregularities, but I overdid the heat a little and caused a tear at the bottom of the door. It will be hidden by the door panel so I am not too worried about it. Practice makes perfect. A word of caution, the adhesive is very aggressive and once the VB-2 is on there and allowed to cool down, it is not coming off easily. In it's shipping state it is fairly stiff, so a little heat from the hair dryer prior to measuring against the panel will make things easier.

One pack of VB-2 covers around 13.8 sq.ft which is just enough to NOT be enough for both doors, so I had to order another pack. I decided to play around with the left overs and put it on top of the Damplifier Pro, and it looks really neat and clean, so I think I will be covering the rest of the interior with it as well. Closed cell foam will be used to build up the areas previously covered by the factory installed foam.

Weight wise, the complete Damplifier Pro installation weighs 44 pounds max. Each box weighs 22 pounds and that includes box and paper liner. The VB-2 weighs 6 pounds including the box, so the complete installation should still net a weight saving compared to the factory sound proofing.

Also managed to get the upper and lower control arms in on one side. They are "new" rebuilt lower ones from 928 International and it is amazing how much thicker the rubber is on these compared to the original lower arms.

I took some Flitz metal polish and managed to get the grounding points around the car looking all nice and shiny. The one for the ABS pump grounding point can be seen in one photo.

Hope to have some more pictures up by the weekend.

Cheers!
Carl

AirtekHVAC

Awesome work!

Orantes

Great work Carl. Nice to see you had a little helper!

BC

I did an entire 928 in RAAmatt and a foam cell layer, so It will be interesting to see the differences when done.

FLYVMO

Thanks Tony, it is a great bonding opportunity and she loves crawling around the car figuring out what all the parts are, and where they go Might just have to find a project 928 for her later...ouch

Carl

FLYVMO

Hi Brendan,

I actually have some Raamat in the garage, and the difference is like day and night (non-scientific test). I did one test panel to compare them and the Damplifier Pro dampens significantly more. The Raamat is much easier to apply though and I think it will probably still be better than the factory solution, especially when covered with the foam like you did. There are certainly some locations on the car that the Damplifier causes me to utter words of lesser quality

Once it is done I will test it with the dB meter application on the iPhone and see what the result is. Did you notice a difference in your car compared to the "original" insulation?

Cheers!
Carl

77tony

Your daughter is doing an excellent job and that 90 is looking incredible. Ask her if she is running a small sound deadening patch on the middle of the inner door skin for additional dampeneing Keep the updates flowing and Happy Birthday Carl T

Tom in Austin

Amazing project, keep the updates and pics coming! Those rebuilt lower arms are great, I put a pair under my car this year and it really makes the ride and steering like Porsche intended.

BC

Yes. I did another car as well, with less Raamat and it made a difference in both road noise and the "fatigue" factor on long drives. The exhaust is loud, but I like that, but need it to not drone.

The rear area is a big deal, as are the doors and front floor as I am sure you figured already.

The roof is also a big panel.

FLYVMO

Hey Tony, thank you!

I will run it by her and see what she says
Actually my doors already have an asphalt damper on the inside of the outer skin, and it is still in perfect condition in one door, while cracked in the other. I may use the Raamat or Cascade Audio VB- 2 there if I have any left over. I am making small panels to cover the big 3 openings in the door, so it should be sealed up pretty good.

Cheers!
Carl

FLYVMO

Brendan,

What thickness closed cell foam did you use in the car?

Cheers!
Carl

FLYVMO

Thanks Tom!

Did you notice any difference in firmness with them, or was it mostly improved steering response?

Cheers!
Carl

BC

Hi Carl. I is basically between 1/8 and 1/4. I think 3/16.

FLYVMO

Some more progress made during the past week. Got my radiator flushed, pressure tested and no with no leaks, it went back into the car, along with new rubber suspension bushings that hopefully will keep the radiator safe for another 10 years. So far this all aluminum radiator has worked very well, knock on wood. Perhaps it is because it has always had fresh and soft bushings to rest on and been properly grounded throughout its life. Still have to straighten the cooling fins and cut off the tabs to make it fit the later fan shrouds.

Steering rack also went back in, along with all new rubber grommets for all cable entry holes. Summit racing sells a kit that has the most common grommet sizes and most fit perfectly on the 928.

The sound insulation is also coming along nicely, the bottom layer of Damplifier Pro is all installed (in progress in the picture) and I am currently installing the Cascade Audio VB2 on top of the Damplifier. All to be covered by closed cell foam of various thicknesses throughout the car.

Horns will be installed next, Hella's super horns that are VERY loud, perfect for getting texting drivers a nice wakeup call!

Hopefully more to come after the weekend!

Cheers!
Carl