Beardy
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 posted on 29/1/16 at 12:47 AM |
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Silencer design
I have seen postings on how an expansion chamber can help reduce noise and cool gasses and read many posts here and elsewhere on how the only way to
get a quiet, free flowing exhaust is to use a very large box. Assuming you want a pipe that is perhaps 2 - 2 1/2" diameter for a typical
engine...
Is there any value in trying something like
http://www.magnaflow.com/products?partNumber=12773
and then putting (welding) a perforated stainless pipe down the middle of the desired diameter?
you would get a considerable empty volume around the inner perforated pipe and you would also have a large volume of acoustic material. Perhaps the
material might last a bit longer being protected by some air gap and an additional perforated pipe.
Or is it a daft idea...?
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ianhurley20
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| posted on 29/1/16 at 10:46 AM |
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I made up my own exhaust system with a 400 cell CAT welded in before a stainless 24" x 6" stainless silencer with 2" pipe in and
out. Silencer came from http://www.mijexhaust.com/ who sell universal silencers through ebay. It cost about £50.
The car sounds very good with a deep note to the exhaust but is very quiet indeed. I didn't want a lot of noise as it gets to you on a long
journey. I suppose my set up is similar to what you propose with the CAT being an expansion chamber then the straight through silencer so I can
confirm the idea works.
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johnemms
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| posted on 29/1/16 at 11:25 AM |
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2.0L Blacktop - just put a 2" bore 5"x 24" from MJ Exhausts - drove it round the block - its so quiet.. 
Someone said longer silencers are more effective than fat ones ... don't quote me lol
Own chassis & Build - First time pass!!
"7's" aren't really "cars", they are 'experiences"
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