Here is a mod of the sound of a 7.3L Powerstroke idling. This mod replaces the sound for the Gavril D-Series pickup truck. Just place the "powerstroke.zip" file into your mods folder.
I've found it difficult to find a satisfying sound for this vehicle so I decided to make one myself. I literally spent HOURS in Audacity perfecting the loop so there are no stutters that can be heard, like in some other mods.
One thing I want to point out is that I realize the sound-to-RPM ratio isn't that accurate, meaning the pitch gain is slower than the RPM gain. I did this because it sounds weird at a higher pitch, at least to me. I wish I knew a way to change the speed without changing the pitch as much.
You'll also notice two audio files in the mod folder, one "powerstroke_engine.ogg" and "powerstroke_engine_high.ogg". I set the volume values low for the second file, but you can open the *.sbeam file and edit it if you want.
I've uploaded a video preview of the sound (I muffled the sound for interior shots to make it seem more realistic):
I might improve this in the future but right now I don't have the time.
Experimental 7.3L Powerstroke Sound Mod 1.1
A perfect loop of a 7.3L Powerstroke engine idle sound.