How to build a muffler

[D8R]

Thanks for the input.
I will set up engine (not ever started it yet) and start with some telescoping tubing to see what lenght means to sound. maybee the idee of building it square is bad, But the space limits the possibility to build a muffler like on motorcycles.
My first idea was to have the box as outside limit and try to make an inside with different walls, making the exhaust travel upto 4 times inside the box.
I´m well avare that the sound of a 3406 can not be duplicated this way but I do not want the "lawn-mover" sound!
Will keep you updated, any more info velcome
Dan

[foub01]

your idea of deviding the box up into sections would work if you put the pipes through at at staggered points with packing in each section would probably be your easiest option.bad drawing but hope this helps a bit