RetroPug's Ph.1 Diablo Gti-6

[RetroPug]

Spent quite a bit of time sound-deadening the whole rear of the car and the roof today. I also added two more layers to the boot floor.

Stripping:


Weighted the large flat areas of sheet metal in the rear quarters:


Added lots of underlay as a sound barrier and to stop this area from being hollow. Hollow areas are not good. The OEM matting went back on top of this behind the trim so this area is absolutely packed.


Weighted the flat areas of the roof:


Covered the flat areas with underlay, being careful to keep it below the profile of the struts so the sunroof couldn't catch on them:


Added some between the gaps on the rear arches:


Work in progress:



This has made a huge difference. I haven't driven it far home at all, and road noise is particularly bad on the motorway, however the three layers in the boot have damped exhaust noise a lot, and the rear quarters now sound absolutely solid when you tap them, and overall the car doesn't produce as much noise. I think the roof being damped has also helped as it does vibrate a lot over rough roads. Next time you go to your car, tap the rear quarter below the window and listen to how hollow that area is!

I'm going to do the doors and front footwells soon too as this is where A LOT of the road noise seems to come from, especially on the motorway.