Noise Insulation for AE86

[decryphe]

Hello everyone!

As you might have read in my project thread, I think my 86 is a little on the noisy side, specifically the exhaust. Still, I quite like how it sounds on the exterior and it's nice inside the car too - just loud inside. To me it seems louder inside the car than outside. So here it goes:
Where are the most efficient places to put sound insulation (foams, sheets, woven stuff, ...) in an AE86 to block out some of the exhaust noise? More specifically the mid range (~300 - 800 Hz)?

I can't be the only one who isn't building a race car

Oh, fun fact: Tires with one flat surface sound quite accurately like a podracer (previous owner must have stopped hard with locked wheels).

Regards Decryphe

[mad.matt]

I would feel the best place to go would to be some dynamat (or similar bitumen based adhesive sheets). Spread on the flat surfaces of the boot floor, underneath the rear bench and see how you are getting on from there.
Acoustic carpet or filler can be had for cheap as well to supplement your boot carpet.

Your exhaust hangers will also transmit noise through vibration so if you've upgraded, you might want to revert to OEM or equivalents.

I've heard some people have also had a limited reduction from wrapping the exhaust. Not sure how worth while it is...

(11-01-2016 10:35 PM)decryphe Wrote:  Oh, fun fact: Tires with one flat surface sound quite accurately like a podracer (previous owner must have stopped hard with locked wheels).

Sticky Track/Gravel tyres on the road do too, amazing noise hah.