Looking for help with exhaust gas accoustical questions
Looking for help with exhaust gas accoustical questions
(OP)
I have a muffler that I have built for a a sport boat. Problem is, it works to well. The boat is way to quiet. Some how I think i have actually got the dimensions correct to cancel out most of the desirable exhaust note. I have look around and cannot find anywher to get any answer on what I should change. I though that maybe someone here might know.
It is a v8 engine and the exhaust goes into a 6" dia tube that is 3 ft long that is mounted accross the transom of the boat. It has two inlets that are 4" in dia and are 28" apart c to c. The oultlets are 4" dia alos and are centerd on the tube and are 12" apart.They are all fluch mounted. Have I fluked out and got the distancese so that the exhaust waves are colliding and cancelling each other out? I can shorten the inlet ends of the tube 2" and the outlets 4" if needed. Or I can add length also.
Mark
It is a v8 engine and the exhaust goes into a 6" dia tube that is 3 ft long that is mounted accross the transom of the boat. It has two inlets that are 4" in dia and are 28" apart c to c. The oultlets are 4" dia alos and are centerd on the tube and are 12" apart.They are all fluch mounted. Have I fluked out and got the distancese so that the exhaust waves are colliding and cancelling each other out? I can shorten the inlet ends of the tube 2" and the outlets 4" if needed. Or I can add length also.
Mark





RE: Looking for help with exhaust gas accoustical questions
Figure out what you did right, market it and sell it!!
RE: Looking for help with exhaust gas accoustical questions
From what I can tell it is the equal distance from the inlets and teh distance between the oulets that are the reason.
RE: Looking for help with exhaust gas accoustical questions
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
A drawing, showing the interior details as well as the connections, might help us better understand your problem.
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
- Steve
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
Maybe you've got some kind of cavity resonance, or anti-resonance, going there, but it's hard to evaluate, since we have no data on the gas flow, the water flow, the noise vs. rpm, the system geometry in 3D, etc.
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
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RE: Looking for help with exhaust gas accoustical questions
Mike Halloran
Pembroke Pines, FL, USA
RE: Looking for help with exhaust gas accoustical questions
RE: Looking for help with exhaust gas accoustical questions