Exhaust silencers / tone control

[mike90045]

I really like the  "blongg  blongg" sound that the lister(oids) make, when they have the long pipe/expansion chambers.  Is there a good rule of thumb to get the sound - [small muffler - long pipe]  or [long, large bore pipe] .
  http://www.youtube.com/watch?v=MvpdYWNFHnU    is a video with an engine at 370 RPM, does that sound change much when at 650 ?  So many engines are recorded with the pepper pot muffler, they nearly sound like the 3600 rpm screamers.
  Just looking for the right sound.

[dieseldave]

  I would imagine that a large bore pipe that is about 20 feet long would have a nice mellow sound.

   Years back,I remember removing the catalytic converter from  a 302 cu in Mustang. We cut a hole in the bottom,smashed out all the ceramic,and welded it back up with stainless rod.  This acted like an expansion chamber and gave that 2 barrel 302 a nice throaty sound!!!!