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Originally Posted by Mikester
^^agree to disagree.
A 1", 2" or 2.5" , 4" or any other exhaust will be louder on a KA than an SR too. So how exactly does the piping diameter make a difference? I promise you, my exhaust is 3" and fairly quiet... and it will outflow a loud-ass 2.5" fart can with less resonating/muffling all day long. There is a difference between engine design that comes into play there- apples & oranges.
Now, if you are saying that 2 identical exhausts... one @ 2.5" & one @ 3" with the exact same resonating/muffling system are put side by side; the 3" will actually be quieter... the one with the bigger piping will theoretically be louder because it flows better; but that isn't the case.
MagnaFlow Performance Exhaust - FAQ, Frequently Asked Questions
Increasing the diameter of the piping actually decreases the velocity of the exhaust flow because the engine isn't working as hard to push it out due to less back pressure. End result will be a quieter, deeper tone all things being equal. |
First off, the page you linked to on the magnaflow website has NOTHING to do with this discussion. OF COURSE a smaller muffler will produce more noise. That has nothing to do with piping diameter, that is discussing overall muffler dimensions.
This discussion has nothing to do with engine design, it has to do with exhaust flow. No apples and oranges here. The one argument you could make on that is that the turbo muffles the exhaust noise, which is theoretically possible, but the turbo produces some noise of it's own as well.
Are you an exhaust engineer? It seems to me that you're just spouting an opinion and presenting it as fact with no technical evidence to back it up. You're taking this much more technical than is necessary. The bottom line is that an exhaust that is quiet on an SR will not be so quiet on a KA...