DeTomaso Mailing List: January 99, Message #228

Mike Drew wrote:
>I'm also going berserk soundproofing my Pantera, per Richard "to ski or not to
>ski" Barkley.  I will have two metal fire walls, three layers of 1/2 inch thick
>insulation, and Super Dynamat on my firewall.  The floors will have Dynamat,
>and then about one inch of sound insulation underneath the carpets.  The roof
>will have Dynamat, and I'm still thinking about what to do with the doors.

Mike,
  Some other areas to consider. I'm putting stuff (Dynamat and Hall's foam
insulation) on the water pipe tunnel. Also, the rocker panels are like
sound tubes going strait from the headers to the cockpit so I'm covering
them with either Dynamat or the Q-Pads I've previously mentioned both
inside and in the engine compartment. Finally, I discovered that there is a
sizeable air gap where the roof side rails (for lack of a better term) and
upper part of the rear window frame come together. I plan to get some
POR-15 in the area as best I can, and then fill with some expanding foam.
The roof side frame should probably also be filled at that point to block
sound traveling down it. As for the doors, some Dynamat on the skins and
maybe some of Hall's foam would be good. But what is really needed is some
modern rubber seal whiskers. Has anyone done this? Wilkinson mentioned one
time that he thought BMW rubber whiskers would work.

Also, I'm going to build a little plastic gizmo to fit over the shift
linkage where it comes through the firewall: the boot doesn't block much
sound. Side to side motion is less than +/- 1/4 inch at that point, so a
small disk with a close fit to the shaft, sandwiched but free to move in a
slightly larger case should work.

For my dual pane rear window I had two pieces of rear window glass cut
about 3/16 larger than stock. These will be bonded together with a spacer
around the edge. They fit in the frame with about 1/8" gap. I plan to clamp
them in place, sealing them with weather stripping or silicone. I'm going
to try and make the window easily removable to give access to the top of
the motor. Based on my calculations, these cannot be sealed if you plan to
drive at altitude: at 10k ft, there would be about 4psi pressure which
would blow it apart I'm sure. I'm thinking of running a tube to a small
bladder (plastic bag?) to make a closed dry system.

I'd be interested in hearing what others have done and/or critiques of what
I've outlined above are welcome.


Sincerely,
Richard Barkley

To Ski or not to Ski, that is the question!

Richard Barkley
(310) 373-6695 (home), 813-2432 (work)
E-mail: richard.barkley@trw.com (work), rbarkley@earthlink.net (home)
Mammoth Condo 2BR+loft/3Bath - Horizons 4 #186 (760) 934-6758
Condo web address: http://home.earthlink.net/~rbarkley