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Too big to fail
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Muffler experts - how can I make this quieter?
This is a Danish repro muffler for a 36hp, and it's annoyingly loud. I'm sure there's a way to modify the internals to make it quieter. I was thinking I could insert a roll of perforated metal across the middle, and then pack fiberglass on around it, and maybe pack some fiberglass on the ends, although I haven't torn one of the ends open yet to see what it looks like. Thoughts?
  
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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07-12-2009, 11:55 AM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
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Jeez, its like they forgot ANYTHING inside. Would try what you suggested, and maybe get some metal mesh for the ends and sandwich it with glass in the middle.
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2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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07-12-2009, 03:38 PM
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Join Date: Jan 2007
Location: Australia
Posts: 7,917
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Weld in a smaller hot dog muffler.....I dunno, Pack it full of stainless steel wool....
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07-12-2009, 03:41 PM
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Too big to fail
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So I made a tube of perforated steel, welded it in, and then packed it with layers of fiberglass and steel wool. I also had to relocated the outlet lower so it would clear the bumper, but that's a different story.
I think that next time I do this, I'll just knock out the mesh pieces in the ends, and push the new mesh tube through those holes.     
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs Last edited by widebody911; 07-12-2009 at 04:38 PM.. |
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07-12-2009, 04:34 PM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
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Well??? How does it sound? Bet a lot quieter.
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2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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07-12-2009, 04:53 PM
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Join Date: Mar 2005
Location: chicago
Posts: 816
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On a VW, I thought the sound was controlled by the tailpipe. You know that little tweet,tweet sound a VW makes. That sound is because of the chrome tailpipes. If you remove those chrome tailpipes, the car will have a more throaty sound.
I'm not sure if the 36 had a tailpipe. |
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07-12-2009, 05:37 PM
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Cars & Coffee Killer
Join Date: Sep 2004
Location: State of Failure
Posts: 32,246
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What you need to do is completely stop the combustion in the engine, instead of merely muffle it.
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Some Porsches long ago...then a wankle... 5 liters of VVT fury now -Chris "There is freedom in risk, just as there is oppression in security." |
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07-12-2009, 05:50 PM
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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,665
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I used steel wool in a muffler once. It lasted 50 miles. Coarse FG works a lot better.
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07-12-2009, 06:00 PM
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Too big to fail
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Dunno about the sound yet - I still have to put the rest of the motor back together, but the oil cooler is still in the hot tank.
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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07-12-2009, 06:02 PM
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Location: chicago
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07-12-2009, 06:21 PM
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Too big to fail
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Quote:
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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07-12-2009, 06:46 PM
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Too big to fail
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Ok, I got the muffler installed this weekend. It is now a lot quieter, even though I didn't put any insulation under the end caps. I'm not sure how long the insulation will last, but I am happy with the outcome of the experiment.
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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07-20-2009, 05:33 AM
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