oem muffler hack

[szentej]

"Well, I'm still confused -- can't figure out how that stock muffler really works internally. Besides, comparing the pictures, there's obviously some difference between the 986 and the 986s muffler (assuming they both are stock).

The reason why I'm eager to know how a stock 986 muffler works, is that I recently bought one to try do a hack myself... but before cutting it open, I thought that I at least needed to know how it works -- but so far no luck.

I might need to emphasize that I'm looking for performance enhancements rather than sound, although I wouldn't mind if also the sound was improved (as long as it's not too loud or sound buzzy).

-- peer"

By labeling the chambers of the first picture of this thread from the left, one through five. The gasses from the left inlet pipe travel through a pipe and are released into chamber two. From there they travel through a pipe and are released into chamber five. Then through a pipe (which you cannot see) into chamber three and out the exhaust pipe. The gasses from the right inlet pipe travel through a pipe and are released into chamber four. From there they pass through a pipe and are released into chamber one. Then through a pipe (which you cannot see) into chamber three and out through the exhaust pipe. The exhaust gasses from the right and left sides do not interact with each other. They each have a separate path through the muffler.

You probably will not gain any performance on making mods to the muffler. Only increased sound.