What I meant was, if you don't know what the thing sounds like, any Diesel sound would do. How could you be dissatisfied if you had nothing to compare it to?
Bob the problem comes when you are running more than one diesel and they are prototypes from different manufacturers (EMD, Alco, etc) even different models from the same manufacturer which used different motors. The two engines shouldn't have the same sound.
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I imagine the QSI would be closer? 12 cyl. vs 6 cyl is nearer to your target.
I agree Chris, thanks.