Acousta-fil exhaust packing

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k.russell
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i was advised to put it in very loose, this is because the blanket grows considerably with heat , try a bit on a flame, i would think if it is put in tight when new it will compact too much and not absorb any sound. my 200bhp VX is around 95db at 5000rpm here was a lot quieter like thishere tested at 88 db at 5000rpm static at Cadwell, but it used to drag the road a bit Kevin R black(but sometimes orange)-ali HPC here
Low Flying Vehicle
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There is an Acoustafil calculator http://www.thermalvelocity.co.uk/calc/calc2.asp So for example on a K series Superlight R3/4/500 STD Caterham titanium silencer it suggests 2.5m (500 x 50) As Nolimits has said above the manufacture Saveguard will calculate your required length and they calculated 2.356m to be correct for my Superlight, this as Andy Whittle suggests in the previous thread this is hard work to squeeze into the can (successfully achieved though) and therefore is tightly packed. I did query with Saveguard there pictures on their web site to make sure that I was doing this correctly which they confirmed, they did give an explanation for there loosely packed pictures but I have forgotten what that was. It could be that they do various Fabric Styles, I am using S2 Glass as it works up to 900 Degrees . Nolimits do you use S2 Glass and does this mean you pack your exhausts tightly or loose? Jon
Parker
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What is the current wisdom on the use or not of the wire wool wrapping around the silencer core. I am looking for the best sound reduction rather than longevity. Any thoughts much appreciated.
NoLimits
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Acoustafil ZT1 Fabric 1000gsm x 700mm wide is the product I am using. This is the product info page. I guess I am packing loose as although its not "easy" to slide over the carbon skin its not difficult either. I wind the fabric pretty tightly but I could always go tighter. Cling film over to keep it in place as you slide the skin over. (As recommended by Saveguard as it melts away). As I posted above dims given to Saveguard and they told me what I needed.