Most bows now are pretty efficient so you should gain somewhere between 10-15 fps, but it just depends on the cam system and limbs, Also if the bow is set-up to spec and tuned right aswell
Which way do the letters run on your module, To lenghten the DL you will be wanting to move the module out away from the cam more to take-up more of the cable, Brownings maybe different or you may have a short draw module installed now, I was thinking the Rage with the MT cam would go to 30" DL so That would be letter "A"