Sound Proofing Defender 90 TD5

Your doing it all wrong.

I have a year 2k Td5 and have been "improving" on an ongoing basis. I have all sorts of material used in different places, which I buy, as and when I can afford.

The open cell 4mm fire retardant foam is cheep and easy to fix, with an appropriate high temperature spray adhesive. You can buy the self adhesive version, but I don't rate it as highly as plenty of adhesive. That's fitted to my new GPS Puma style bonnet in two layers.

I have fitted an Alpine system, with head unit, amp, six speakers and an Alpine under seat subwoofer. The speakers are fitted just behind the front driver and passage doors. I have built a long fitted box in 4mm ply that hold 2 9x6 Alpine speakers. The ply was very carefully cut with two boxes for the speakers. I then filled any gaps and used spray foam to fill the cavities. I also used the ply to cover both sides of the internal bulk head, fitted one (so far) amplified, sub woofer. I then filled the cavities with more spray foam.

I also fitted a plywood rear floor, wheel arch upsands and tops. Beneath the plywood I used expanded polystyrene foam sheet and bolted down with s/s .

In the headlining, I bought some foam mats from Liddle (the type that are used for floor excercise). Very cheap, easy to fitt with high temp spray adhesive. I them filler the gaps between the fron head lining with 6 mm close cell foam. I have still to finish the rear headlining, but intend to use the same product.

I did a huge amount of research before I undertook, but was totally confused by the end of the process. I am of the view, that anything that you can use to either absorb sound or eliminate vibration has to be a set in the right direction

AJJackson1 said:

Right guys, I just spent £175 on products today and they will be delivered Monday and hopefully fitted pretty damn soon after.
I have done a few test runs and I seem to get between 95 and 100dB at 55mph with no sound deadening. I will report back with my findings early next week.
Just so you all know, my strategy is 100% 2mm silentcoat coverage, maybe double up on the big panels as suggested, 100% camping mat (closed cell isolator), 100% MLV.
I'm hoping for good results!

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I've bought the AWR4147 Bonnet insulation sheet for my 110 but it doesn't come with a fitting kit. Anybody got any experience of fitting this panel? Should I buy a kit or just use self tappers and glue?

Late to the thread but if the end goal is reducing noise at motorway speeds than an overdrive install is the best bet you've got!
Glad I stumbled across this, loads of useful information. I was about to pull the trigger on a precut "kit" but that now seems expensive and fruitless.

I love the sound of the TD5 engine.