I haven't seen any discussion on propane injection on thses engines. It is a topic of some popularity on my "other" diesel board, "The DieselStop.com", (fka, Ford-Diesel.com).
It seems that on those 7liter engines using up to 6psi thru a 3/8" orifice gives substantial power boost--like from 25 HP and up. (I think all those numbers are correct)
The benefits claimed include, more power, more complete combustion, no smoke.
It seems the propane acts as a catalyst for the combustion of the diesel fuel. Both turbo and naturally aspirated moters benefit from this modification, although the turbos gain more.
The set up is quite simple-- a propane tank and the proper regulator ( BBQ regulators do not supply enough), some simple plumbing run to the air cleaner, a restriction and some sort of a difuser inside the air cleaner. a solenoid valve and a micro swith on the injection pump linkage to open the solenoid at W.O.T. There may be some other minor parts, but that seems like the whole system.
I can't see any reason why this would not work on MB engines, Has it been tried?
Any comments?
Michael