[Tommy]

One straightforward way to address this matter would be to do a double blind test where people who claimed to be able to hear the difference would listen to a variety of engines and express their opinons as to what they were hearing. I think that would go a lot further toward explaining the differences in perceived sounds than analyzing the mechanics of each engine. After all, it may be that people who spent a substantially higher sum of money for the privilege of owning a 427 FE may just find it comforting to believe that they can hear evidence of what they paid for.