Look on the DLS for wva-usa there are some good engine sounds from him but don't take too much notice of the description.
For instance the description might say large American articulated locomotive but if your engine spec is set up properly it will only have four chuffs per revolution of the drivers. Your engine spec must have two tags :- "number-cylinders 2" and "number-power-strokes 2" for the sound to work as intended.
Cheers,
Bill69