[brucepick]

Thanks Coyote X and RH77.

RH77, I just finished reading through the article. Very informative.
I wouldn't be so quick to discount your observations. If it happened, it happened.

I think the disconnect between our needs and the article's 'Mufflers' section is in the different goal - we're looking for FE. He says a stock muffler doesn't perform well, right after describing how it cancels sound pretty well. And he says that free-flow mufflers won't really help much because the pipe already is restricting flow. I think that he's saying, if you really want performance, you need bigger pipes and a freer flowing muffler.

That's probably true when you need performance. Wide open throttle (wot) between say, 3.5K and redline. That's performance driving, not FE driving or humdrum commuting. In performance situations just adding a free flow fart can won't give significant added breathing room if you've opened up the intake and maybe done some cam or valve mods. At lower rpms were we FE people live, even if at 75-80% throttle, things are different, I'd guess.