Hey, @Ron045! I've been following you since the AEM7 install and you're leading the pack on some of these installs! Kudos!
I also love the sound of two slightly different EMD's in my F units, although I use TMCC sounds and swap sounds. My favorite part is the slightly notch up / down differences and the different pressure releases.
The one engine is a 645E 12 Cylinder Non Turbo and the other is a 645 Non Turbo. Just enough so they don't sound alike.
I read somewhere that NS actually put turbos in the B units. Since Soundtraxx actually gives you half a dozen or so prime mover options in every Blunami, I might try a Turbo in one of the units just to see how it sounds.
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