Acoustafil fitting Instructions
Fitting Acoustafil
If you have a removable baffle tube - it's quite easy to roll the material around the tube & fit the baffle back in the silencer outer.
If you do not have a removable baffle things get a little more tricky....
We have devised a way of overcoming this problem - not as easy as with the removable baffle - but should help to fit the packing as it should be - with the correct density of packing.
The Acoustafil Volume Calculator will allow you to work out how much packing you need - it may look a bit complicated - but as long as you have the dimensions of your silencer entered - it will tell you how many layers of wrap you need - to arrive at the correct density - the "Fill Length metres" (green box) is the figure to look at - after you have entered your dimensions in the Blue Boxes.
There will also be a table below the calculator - showing the diameter of the wrap for each added layer. (to convert inches to centimetres - multiply by 2.54)
Here's an example of a 2.5" perforated tube - with an outer of 6" - (a very big silencer !)
The calculator gives a packing fill length of 2.173 metres - this particular silencer is 22" long so using 300mm wide packing - will need 2.173 x 2 - & as the 2 x 300mm is a little over on length - if the extra length can be compressed in to the silencer - and the end cap fitted - the nearest full metre length should work out ok.
If you have a removable baffle tube - it's quite easy to roll the material around the tube & fit the baffle back in the silencer outer.
If you do not have a removable baffle things get a little more tricky....
We have devised a way of overcoming this problem - not as easy as with the removable baffle - but should help to fit the packing as it should be - with the correct density of packing.
The Acoustafil Volume Calculator will allow you to work out how much packing you need - it may look a bit complicated - but as long as you have the dimensions of your silencer entered - it will tell you how many layers of wrap you need - to arrive at the correct density - the "Fill Length metres" (green box) is the figure to look at - after you have entered your dimensions in the Blue Boxes.
There will also be a table below the calculator - showing the diameter of the wrap for each added layer. (to convert inches to centimetres - multiply by 2.54)
| This is how the Acoustafil should be fitted - not with the big gap ! - this is just to illustrate the general idea ! |
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| The use of tubing the same size as the perforated silencer inner tube diameter (preferably smooth tubing) - will allow you to roll the wrap the correct number of times. |
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| Wrap Acoustafil around the tube - then slide into the silencer - You may find it easier by holding in place with some thin wire (not too tight) |
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Here's an example of a 2.5" perforated tube - with an outer of 6" - (a very big silencer !)
The calculator gives a packing fill length of 2.173 metres - this particular silencer is 22" long so using 300mm wide packing - will need 2.173 x 2 - & as the 2 x 300mm is a little over on length - if the extra length can be compressed in to the silencer - and the end cap fitted - the nearest full metre length should work out ok.
| Inner Dia (mm) | Length | Accumulative length of packing (mm) | |
|---|---|---|---|
| 63.5 | |||
| Layer 1 | 79.5 | 249.79 | 249.79 |
| Layer 2 | 95.5 | 300.06 | 549.85 |
| Layer 3 | 111.5 | 350.33 | 900.18 |
| Layer 4 | 127.5 | 400.61 | 1300.79 |
| Layer 5 | 143.5 | 450.88 | 1751.67 |
| Layer 6 | 159.5 | 501.15 | 2252.81 |
