I would cut a 45 degree on the end of the pipe to soften the note.
I rode 10 hours each way in a truck with no muffler--except for the
deafening noise reflected off the trailer we were pulling--you never
know it had a straight pipe. :)
The muffler needs to under the box and not the cab to help also the
hangers need to be the stock ones.
Pat
On Jul 21, 3:41 pm, Buy_Sell <werksp...@[EMAIL PROTECTED]
> wrote:
> Since its so quiet around here and nobody seems to have anything to
> talk about, I've got a question about hovercraft mufflers. I realize
> that a considerable amount of noise comes from the props/fans but if
> you were trying to design your own muffler, what method would you
> choose?
>
> I've got no muffler or catalytic converter on my F350 turbodiesel and
> it doesn't seem to make any more noise than when all of this
> restrictive stuff was attached. It appears that the turbocharger eats
> most of the noise. BTW - the reason for removing these parts was to
> improve fuel economy which it appears to have done.
>
> I recently purchased a book on how to make the ultimate 10/22 ruger
> and it has a section in it pertaining to silencers. The author's
> research leads him to believe that rolled up wire mesh, similar to
> window screen, seems to make the best silencer. So, here are two
> ideas that might be applicable to making the ultimate hovercraft
> muffler.
>
> Then, there was the 'amazing muffler' which I saw in a science
> magazine several years ago. This muffler design divided the airflow
> into two pathways around a vee, into another chamber which had an
> opposite facing vee with an exit hole in the middle of the vee. The
> claim was that each chamber would reduce the sound by 70%. The
> reflected sounds in each chamber would cancel each other out. I've
> noticed a similar effect when target shooting at the local gravel
> pits. I am constantly amazed at how a high powered shock wave can be
> almost completely cancelled by standing in the right spot.
>
> So, for all of you quiet guys out there, let's hear your thoughts on
> making things more quiet...
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