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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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.

Weld in a smaller hot dog muffler.....I dunno, Pack it full of stainless steel wool....

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.

http://images.thesamba.com/vw/gallery/pix/575462.jpg
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Well??? How does it sound? Bet a lot quieter.

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.

What you need to do is completely stop the combustion in the engine, instead of merely muffle it.

I used steel wool in a muffler once. It lasted 50 miles. Coarse FG works a lot better.

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.

http://images.thesamba.com/vw/gallery/pix/575485.jpg

hebster52 has a thread on a homemade pea shooter

http://forums.pelicanparts.com/porsche-356-technical-forum/445451-sebring-style-mufflers.html?highlight=hebster52

That guy does some crazy metalwork. He made this dogleg by hand.

http://i45.photobucket.com/albums/f9...l/DSC_0898.jpg

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.