BB wowbagger

As i got bored one afternoon i started thinking of a idea of a muffler that a friend of mine had told me about.He had told me that racebikes uses a a "cross" welded inside the mufflers to be able to get the noice down when they race at the tracks.
So i thought that i could use this on my sidepipes,but have more than one cross.
The sound is nice,a little on the quiet side (may have overdone the number of crosses) but gives a real nice rumble and doesnt seem to cost much HP. Going to make a new set with less crosses.. :smash: :smash:
I made these in a couple of hours as a Prototype,so they can be made more serious :smash:
Any thoughts on the design?



[Modified by BB wowbagger, 4:14 PM 5/19/2004]

427V8

That really works??

What are the crosses, just welding rod?

:cool:

BB wowbagger

They work really nice.I had an augger type muffler before but i`ve always thought that they sounded a bit "hard",no rumble..
These inserts are made by 27 inch long 3 inch diameter perforated tube and the crosses are normal weldingrod inserted in a "spiral" pattern and i used steelwool as dampingmaterial.. :smash: :smash:

BeaterShark

Do you know the theory as to why a welded "cross" will reduce the noise?

BB wowbagger

I have no idea,but it works :thumbs:
It could be that they break up the sound/pressurewaves and reflects them into the damping materiel?