Chris_R
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| posted on 24/8/04 at 10:17 PM |
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DIY Silencer
Has anyone made one? I'm thinking of making a straight through back box using wire wool to deaden the sound. Don't want it to be too
quiet though. Any tips?
It's not for the locost, it's for my Cav.
A bit of slapstick never hurt anyone.
http://www.chris.renney.dsl.pipex.com/
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Viper
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| posted on 24/8/04 at 10:57 PM |
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dont use wire wool, it burns, you can get exhaust waddind it is pretty much the same as loft insulation.
Tim
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type 907
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| posted on 24/8/04 at 11:09 PM |
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Back box
I'v got a half made back box in my garage
for an alfa cloverleaf.
I put a straight through pipe on so he could still use the car
while I made the box. He came back the next night and said,
" forget the box, I'll keep the pipe, sounds gorgeous".  
Paul G
Too much is just enough
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DaveFJ
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| posted on 25/8/04 at 07:51 AM |
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I'll vouch for Paul G's silencers........
When I visited he was in the middle of making a pair for an Aston martin IIRC.... and damn fine they looked too !
Cheers
Dave
"In Support of Help the Heroes" - Always
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craig1410
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| posted on 25/8/04 at 12:14 PM |
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Chris,
Make sure you use stainless steel wool around the perforated tube and then some form of loft insulation/rockwool material around that. Also, make
sure you pack it in really really tightly.
I didn't actually do this myself because by the time I priced the various materials required I was able to buy a ready made silencer more
cheaply, even from Demon Tweaks... £57 each for a 5" outer diameter, 625mm long, 3" centre bore straight through glass-pack. It's
not stainless but I didn't want stainlessa anyway.
Cheers,
Craig.
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Chris_R
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| posted on 25/8/04 at 05:45 PM |
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Thought about just replacing the box with a pipe. Is it legal?
A bit of slapstick never hurt anyone.
http://www.chris.renney.dsl.pipex.com/
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blueshift
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| posted on 25/8/04 at 05:51 PM |
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There's a sound level test for SVA, and I think in theory you can be pulled for having a noisy exhaust fitted post-sva.
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Peteff
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| posted on 25/8/04 at 05:51 PM |
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It's legal as long as it's not replacing a catastrophic converter and doesn't make too much noise. I don't think they SVA
Cavaliers Blueshift .
[Edited on 25/8/04 by Peteff]
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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ned
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| posted on 26/8/04 at 08:21 AM |
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use the insulation type material, but dn't pack it too tight as it can be noisier! You want the material to absord noise, not let it bounce
around/echo in there..
Ned.
beware, I've got yellow skin
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Chris_R
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| posted on 26/8/04 at 05:27 PM |
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Cheers guys, thanks for the info. For me louder is better so will give it a go and see what happens.
A bit of slapstick never hurt anyone.
http://www.chris.renney.dsl.pipex.com/
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craig1410
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| posted on 26/8/04 at 10:23 PM |
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Ned,
I was going by what "Simon" said, if you'll pardon the pun. He made up some exhaust silencers for his Rover V8 and realised later
that he hadn't packed the cans tightly enough and had to get more wadding. I did a lot of research when considering making my own silencers and
a recurring theme was to make sure they were packed tightly and to use stainless steel wool around the perf tube.
Cheers,
Craig.
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jmbillings
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| posted on 27/8/04 at 01:52 PM |
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we made one, used to buzz at a certain rpm but worked ok. We've recently replaced it with an MK one, and it sounds *so* much nicer tho!
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