Quote:
Originally Posted by Cavpilot2k
Question:
Many of us don't like the sound of the M3/M4 and blame it's "fartiness" on the S55, and hope against hope that the M2 Comp sounds better (since most of us think the N55 M2 sounds better than an M3/4).
Isn't that something that can be solved by a better exhaust setup though? Why is it the engine's fault. The farty sound seems to me to be the result of a valve flapping (much like a butt cheek). Wouldn't a valve-less exhaust cure much of that problem?
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The problem with the S55 sound is fundamental to that engine.
6 headers routed into 2 individual turbos that does not combine down the stream results in the lawnmower 3 cylinder engine sound.
They designed the engine that way and chances are they aren't going to be able to change the exhaust routing without affecting the factory design.
There's only so much they can sound tune. People make it louder with aftermarket stuff but it still sounds very raspy and empty
There are aftermarket full length exhausts out there for the M3/4 that combine the exhaust routing to make a better sound, but still falls short when the revs go high.
With what we have seen from the test cars, the S55 sound remains.