Don't ask me what it is, all I've found is the name and application on another site, found with google. May the site have had incorrect info? BTW, it was explaining the system YS engines use, and called it "passive crankcase supercharging". I'm thinking it's supposed to be "positive" instead of "passive", as that'd make more sense, but, all I know is what the site said.

The reason I'm asking is to figure out if supercharging will work on a model diesel. If it heats the air too much, it'll mess with the timing, and make it impossible to run. What kind of boost could one expect?