Soundproofing update.

Post by **Longdog** » Tue Dec 30, 2008 5:36 am

Hi folks, for those that are interested in driving their Mog without earplugs here's an update.
I have tackled the soundproofing with different materials depending on access in the future, these are as follows;
Dynamat.Used where panels are likely to drone, applied to bulkhead behind dash, underside of dash,gearbox tunnel,doors,kidney bowls,rear quarter panels,roof over cab (traveller) and strategic panels applied to floor.
13mm Closed cell foam.I applied this to floor pan,behind dash on bulkhead,rear quarter panels,under rear seat,and under "parcel shelf",apertures in doors not covered by mat,secured with gaffer tape.
Original Jute soundproofing.This was used on floorpan,gearbox/prop tunnel and under rear seat.There is only a layer of foam and Dnamat under the pedal area.
The results are amazing.It is no longer possible to hear the fuel pump ticking and at cruising speed the car feels refined and it is possible to hear the stereo with renewed clarity.
Bearing in mind I have a fairly rorty maniflow system on the car it's impressive.
There is one downside however,all of the rattles and squeeks which were masked by engine noise have become apparent, I shall now be tackling them.

Post by **Longdog** » Tue Dec 30, 2008 5:39 am

More.

Post by **millerman** » Tue Dec 30, 2008 9:16 am

Tidy job, where did you purchase Dynamat and approx cost?

Cheers and have a good New Year

Post by **Longdog** » Tue Dec 30, 2008 1:21 pm

Hi millerman,Dynamat came from ebay.I bought a bulk pack of 9 sheets for £120 which was more than sufficient.As it is a buy it now job I think they may still have some.Some retailers want £200 for a pack this size so the advice is to shop around.

Post by **Longdog** » Tue Dec 30, 2008 1:24 pm

Hi small update, car audio security is the company and they still have some at the same price.This is Dynamat Extreme not to be confused with ordinary Dynamat.

Post by **Longdog** » Tue Dec 30, 2008 1:25 pm

Oh and sorry happy New year to you too

linearaudio · Post by **linearaudio** » Tue Dec 30, 2008 8:05 pm

Merry New year!! Super job, can't get my head round the idea of £120 even let alone £200, but looks excellent! Where did you source the closed cell sheet, at what size/price?

Post by **Longdog** » Tue Dec 30, 2008 8:16 pm

Thanks.applying this stuff is very addictive as it sticks like shoot to a blanket so justifies the price

The closed cell foam was pipe insulation also from ebay.Cost of this was £50 for enough to do two mogs.Product is called Armaflex which is fireproof and water resistant and comes in a flat sheet 1m in width so is ideal and a fraction of the price of automotive stuff.
Happy New year.

Post by **aupickup** » Tue Dec 30, 2008 8:54 pm

i got some by ivanoho and it again seems good, has good sticky qualities, foil backed and £20.00 for 20 sq ft

Post by **tortron** » Tue Dec 30, 2008 11:25 pm

what thickness did you use? all the same?

Post by **Longdog** » Wed Dec 31, 2008 7:12 am

All panels treated have only 1 layer which seems sufficient.

Post by **PAULJ** » Thu Jan 01, 2009 6:35 pm

Im at the point of soundproofing mine. before i spend that sort of money will you be able to tell if its any good?
Cheers

Post by **tortron** » Thu Jan 01, 2009 9:21 pm

Longdog wrote:All panels treated have only 1 layer which seems sufficient.

what thickness of dynamat?
1/8, 1/4, 1/2 (i think those the the thicknesses it comes in?)

Im at the point where the interior can be done(new rubbers

) and am quite interested in soundproofing

have you gone for something under the hood?

Post by **Longdog** » Sat Jan 03, 2009 6:44 am

Hi thickness of Dynamat extreme is about 1.5mm, it is the aluminium backed Butyl that I used.The foam they make comes in the thicknesses you quoted.

Post by **Longdog** » Sun Jan 04, 2009 4:29 pm

I used Newton commercial quilted mat under bonnet so did not use dynamat here

Post by **aupickup** » Sun Jan 04, 2009 4:36 pm

how is that fitted on

Post by **PAULJ** » Sun Jan 04, 2009 5:11 pm

Thats nice, how much do they want for one of those

Post by **Longdog** » Sun Jan 04, 2009 5:27 pm

I cant remember exactly, about 50 sheets rings a bell.It is fitted with contact adhesive.Gives the bonnet a nice thud when it is closed too.

Post by **MarkyB** » Sun Jan 04, 2009 6:07 pm

Did you do it all in one go?
If not, which made the most difference.
Particularly doing the doors, how much quieter did they make it?

Post by **Longdog** » Mon Jan 05, 2009 1:53 pm

Hi Mark I did do the job in one go.I would have thought the bulkhead, followed by the floor make the most difference however doing the doors gives them a nice dull thud when they are closed and cuts down some noise.You can always do the job in stages though.I also found putting this stuff in the roof reduces drumming.You can tell by tapping panels where the matting will have the greatest effect.A lot of people who have used Dynamat suggest that you can fit 2 inch strips 2 inches apart but obviously total coverage works best.Hope this helps, Andy.