Hi Remon
You can use this mod to make the torpedoes more powerful.
One Ship, One Torpedo v1.00
http://www.subsim.com/radioroom/downloads.php?do=file&id=3366
There are 2 versions.
Version v1.00 is the more powerful one of the 2 and is the one I use.
Do not give any bonus points to your torpedo man as you will find your torpedoes will start missing the target.
Peter