hugo_wilson
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| posted on 10/6/10 at 11:42 AM |
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Noise issues again
So I posted a couple of weeks ago about a failed iva, most of the stuff i have fixed. One problem remaining, exhaust still too loud by a couple of
db.
Any cheap easy tips. Test is on Tuesday so I only have this weekend. People were saying re packing but the silencer I have is welded so I can't
get back into it. How much difference would heavy restriction at the manifold end make? If so how much should i do it by.
Cheers
Hugo
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austin man
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| posted on 10/6/10 at 11:50 AM |
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cant u put a reducer in the end of the pipe
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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andrew
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| posted on 10/6/10 at 11:55 AM |
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try poping a stailess steel pan scrub in see how much it deadens it if not enough put more in try tying a bit of wire on to get them back out again
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hugo_wilson
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| posted on 10/6/10 at 12:04 PM |
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quote:
Originally posted by andrew
try poping a stailess steel pan scrub in see how much it deadens it if not enough put more in try tying a bit of wire on to get them back out again
R u suggesting putting it in at the manifold end or stuffing it up the outlet. How much difference does this make in ur experience, it almost seems
too simple.
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suparuss
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| posted on 11/6/10 at 04:49 PM |
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all you need to do is restrict the flow of sound waves coming out of your pipe. steel wool, pan scrubbers, fibreglass wadding, any thing that wont
melt and wont stop the fumes exiting will do the trick. stick a load of wire wool in your mouth and try shouting! 
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Hellfire
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| posted on 11/6/10 at 05:25 PM |
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This thread reminds me of our SVA back in 2004. We initially failed the noise test and the tester suggested he was going to have a cup of tea and that
if we could figure a way to quieten the exhaust, he would re-test the noise.
We eventually managed to get some wire wool from the local builders merchants round the corner and rammed it up the tail pipe as tight as we could.
The wire wool would hold firm til about 7,500 rpm, where it would shoot out of the exhaust about 20 yards down the carpark. We kept running to
retrieve it and kept ramming it back up with a screwdriver but the same thing kept happening.
The SVA tester knew we weren't going to give up until it passed and after about 20 minutes of him laughing hysterically, it eventually held for
long enough to get a pass........
Phil
[Edited on 11-6-10 by Hellfire]
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hugo_wilson
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| posted on 15/6/10 at 09:17 AM |
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PASSED. Thanks for all of the help!
98 dba
Used a sorta wirewool mufflernup by the manifold 
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