After desiring more from the U-Boat engines sounds, I made this. Consists of 2 versions, lower RPM and higher RPM diesel's with audible forced induction present.
http://www.filefront.com/14347691/SH...eSoundMod.rar/
Simply choose one and place the files in your SH3/data/Sound directory.
Enjoy
SH3 (Mez)