muffler design 2

[baris23]

i need same constants or diagrams that relates
the frequency of noise coming to muffler and engine power/rpm of engine
i mean im searching for some costants that relates the engine power and
noise charactheristics at muffler.
and necessary muffler characteristics(effectlve lenght,porosity,
inner-outer diameter etc.) depending on engine type and power..
thank you..
best wishes

baris EROGLU
XX

 

[Rob45]

Check my reply to another topic "Muffler Design Rules"
thread384-80519 point is that in general, total system muffler volume will run 5 - 8 engine horspower per liter of muffler displacement, just as a rule of thumb. There are of course variations depending on whether the vehicle is a luxury car, a "sporty" car, a truck etc.

The basic design is that the muffler internals consist of a group of both side-branch-type and annular Helmholtz tuners, designed within the parameters discussed in that other post.
- Robert