On 04/25/2011 11:07 PM, Bill Bradburry wrote:

Hi Bobby,

 

The cutaway drawing I saw shows the “Vs” welded to two spiral strips that are then inserted into the muffler.  That is why I was wondering about the marks on the outside of the muffler.  The 4 inch inlet on a 4 inch diameter muffler would lead one to believe that you could weld the “Vs” up inside a pipe and produce a muffler.

 

How would one weld up inside the pipe anyway???

 

Cut square holes with a die, and then weld in square tube.

At least, that is how I would do it.