Bonneville America Forums Forums Technical Forums Exhaust who would know muffler packing inside and out?

Anyone know who i could contact that would be a real expert on the subject? I need at ask details such as whether there are any materials that will give a wothwhile reduction in noise over fiberglass and any tricks that will also help make it quiet as possible. I've asked here before so i know the answer isn't here. But maybe someone here can point me to someone who knows this stuff inside and out.

the major pipe companys could help. just say you have there pipes. try places like vance and hines.

Frank

I did that with thunderbike (no help) and staintune. (haven't yet replied) I think when you talk to them in order to get the REAL truth from a knowledgable person you'd need to talk to the designers, and usually you don't get to. It's generally someone whjo the company assigned to that task, a rep or such. And while they may know a lot they usually don't knbow things like this which are known to those who've done it all themselves and truly know such fine details.

I need to find an independant guy who's very experienced at this perticular task.

what pipes are you running? why don't you just run the stockers if you want it to be quiet? If you pack any more material in any of the open / less restrictive pipes it will compromise the performance.

IJohn, as Fox Mulder and Dana Scully once said "The Truth Is Out There" Keep searching, try the internet, you'll will find what you want.

yea, i have been. haven't found anything yet that was nearly as informative as i need. But it ain't over yet.

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As for restriction, the pipe is straight thru so the material i use and how i use it to pack them shouldn't have any impact on performance.

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You're right on that count. Wish I could help you but haven't done much of that.
Maybe you'll just have to experiment and become the resident 'spert.

I call one of the big mail-order places:
Chaparral, Competition Accessories, Brockton Cycle Center. Check with their dirt bike parts person. Those dirt bikers are always repacking their mufflers.

There is a good writup on repacking mufflers on Dingua's web site. Sorry I don't have the link here.

To reduce the loud crack in the exhaust note I made a reducer and inserted it at the clamp end.
The reducer is a tight fit and you push them in from the clamp end I made mine with an opening of 30mm,this reduces the overall loudness and cracking note and leaves you with a very deep rumble ,it also improves the back pressure which in turn improved the performance a little.Just do the same with both pipes and you can even experiment with smaller diamanters if you like.It worked for me and was simple ,then if you want it loud at a later date ,you just pull the reducers out again.
Cheers
Steve

Steve......that sounds fabulous ! But i have no idea what to do. I can't even envision it. This has me rather excited, but could you elaborate to a degree that would make it do-able or would that be to hard to explain?

Ok, i found some reducers on google so i see what they are no. heres a pic, i assume this is what i need? (of course with the correct in and out diameters) How do you make them tho, and do you know the diameter it needs at the large end? i suppose if i got a piece of pipe from a hardware store and slit it from about 1/2 way down and bend it to form a cone that would work eh? Also, how long did you make them?