Good Afternoon Folks,
Just an update on my opening post(Quest to quieten and improve my Golf) for anyone interested.
Acoustic work done:
Boot area and rear wheel arches - Sound deadening only applied so far
4 doors - Sound deadening applied. Mix of 4mm and 8mm Noico Red installed in various locations
Car Floor & under rear seat - Sound deadening applied. Mix of 4mm and 8mm Noico Red installed in various locations
50mph - Before 73db -- After 70db (
3db improvement)
60mph - Before 77db -- After 72db (
5db improvement)
70mph - Before 80db -- After 73db (
7db improvement)
Additional work done:
2 x rear bumper pressure vents sealed to prevent reoccurrence of puddle found in spare wheel well.
1 x Harmonic Damper installed on rear subframe(Thanks GolfDave).
1 x drain hose(VW badge boot opening handle) replaced, found perished, causing moisture ingress.
2 x rear doors modified internally with silicone to alter the moisture path taken by the drain water. The water was coming in at either end of the window glass seals. The forward entry point had the water naturally draining down over the back of the speaker. If your speaker seals and destroyed(
Very likely) then this water will come inside the car and pool in the rear passenger footwells.
NOTE: I was unaware i even had this water inside as it goes through the carpet and gets soaked up in the underlay. I found a puddle, maybe 1 litre or more.
4 x Speakers and tweeters replaced from stock 20W to Pioneer 80W.
Overall i am very happy with the acoustics. The car is noticeably more quiet. I had a long journey of 400 miles this week and it's less noisy. You can listen to music at a lower level as it's not fighting other noise. I can hear frequencies in music/radio that i was missing before. I'm not having to raise my voice to have a conversation with a passenger(unless i need to raise my voice to that passenger
). The car is also much warmer.
I'm sure i haven't done everything right as i'm only learning as i go, but it's been very enjoyable to get good results and i've learned alot. The weak points in the car in relation to moisture ingress i hope to had addressed without any unintended consequences, time will tell.
This took a long time and ideally you should have a garage or dry/warmer weather. I did this outside in the cold with a heatgun
If anyone wants to do this and i can save them time/effort with the benefit of my experience, just message me.
Tel