I've been off line for some time, so a little late in picking up the supercharger thread. If I remember correctly, (a little over thirty years have gone by!) two stroke diesels of the Detroit kind cannot run without supercharging, as the crankcase compression isn't sufficient and uncontrollable over reving due to lubricating oil creating fuel excess. Turbo charging and suppercharging have very similar effects on diesels. Not much point in doing both, just a question of getting the boost pressure right!
Matthew
